Natural Resources
Conservation Service
Major Land Resource Area 048A
Major Land Resource Area
Accessed: 04/23/2026
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Located in LRU RM-1. These sites are found on the east side of Sangre de Cristo mountains.
Located in LRU RM-2. These sites are found on the west side of Sangre de Cristo mountains, Tusas Mountains (southern San Juan mountains) and Jemez Mountains.
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
Site receives no extra water beyond normal precipitation
Site has water table 0-36 inches in depth, soil depth is > 60 inches; family particle size is fine or fine loamy
R048AY006NM – Mountain Meadow
R048AY006NM – Mountain Meadow
Site not as above
Site in landscape position that receives run-in water, no water table present in 6 feet; family particle size is fine-loamy or fine
R048AY003NM – Mountain Valley
R048AY003NM – Mountain Valley
Site not as above - not written
Precipitation is 20-30”; Elevation is 9,000 ft or higher – Subalpine climate zone
Precipitation is usually 16-20 inches (precipitation can range from 15 to 25 with aspect differences); elevation is approximately 7,000 to 9,000 feet.– Mountain climate zone
Parent material basalt; soils depth is greater than 60 inches; family particle size can be fine, fine-loamy or loamy-skeletal
R048AY001NM – Subalpine Grassland
R048AY001NM – Subalpine Grassland
Site not as above not written or see Colorado MLRA 48A key for more sites
Precipitation 9-12 inches(ustic bordering on aridic moisture regime); frigid temperature regime; approximately 6,000-8,000 feet in elevation – Semidesert climate zone
Precipitation is 12-16 inches (aridic bordering on ustic moisture regime); frigid temperature regime; approximately 7,000 -8,500 feet in elevation - Dry Mountain/foothills/ climate zone (Note: This climate zone is called Upland in Utah sites.)
Precipitation 16-20 inches (typic ustic moisture regime); frigid or cryic temperature regime; approximately 7,000-9,000 feet in elevation – Mountains climate zone
Precipitation 20-40 inches (ustic udic and typic udic); cryic temperature regime; below tree-line; approximately 8,000 – 10,000 feet in elevation - Subalpine Climate zone
Precipitation is 30-50 inches (Typic Udic); cryic temperature regime; above tree-line; approximately 10,000-14,440 feet in elevation - Alpine Climate Zone
Site has bedrock within 20 inches of the soil surface
Site not as above - soil depth is greater than 20 inches
Parent material is shale
Parent material is not shale
Family particle size is fine
R048AY007NM – Mountain Shale
R048AY007NM – Mountain Shale
Site not as above
Family particle size is loamy
R048AY008NM – Mountain Brush
R048AY008NM – Mountain Brush
Site not as above - not written
Soils are skeletal (greater than 35% rock fragments)
Site not as above
Parent material basalt, volcanic rock and metamorphic rock; family particle size is clayey-skeletal or loamy-skeletal
R048AY005NM – Mountain Malpais
R048AY005NM – Mountain Malpais
Site not as above - not written
Parent material sandstone, shale, basalt and limestone family particle size is loamy
R048AY008NM – Mountain Brush
R048AY008NM – Mountain Brush
Site not as above - not written
Soils are skeletal (greater than 35% rock fragments)
Site not as above
Family particle size – clayey-skeletal
R048AY004NM – Mountain Loam
R048AY004NM – Mountain Loam
Site not as above - not written
Fine family particle size
Site not as above
Parent material is shale, soil depth 20-40 inches
R048AY007NM – Mountain Shale
R048AY007NM – Mountain Shale
Site not as above
Parent material is basalt, igneous rock, metamorphic rock, sandstone, shale, or other sedimentary rock, soil depth greater than 40 inches
R048AY002NM – Mountain Grassland
R048AY002NM – Mountain Grassland
Site not as above - not written
Site is fine-loamy family particle size
Site not as above - not written
Parent material is basalt, igneous rock, metamorphic rock, sandstone, shale, or other sedimentary rock, soil depth greater than 40 inches
R048AY002NM – Mountain Grassland
R048AY002NM – Mountain Grassland
Site not as above - not written
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
Site receives no extra water beyond normal precipitation
Site has water table 0-60 inches in depth, soil depth is greater than 60 inches; family particle size is fine or fine loamy
R048AY016NM – Mountain Meadows
R048AY016NM – Mountain Meadows
Site not as above
Site in landscape position and receives run-in water, no water table present in 6 feet; family particle size –fine; parent material - shale
R048AY014NM – Mountain Valley Dry
R048AY014NM – Mountain Valley Dry
Site not as above - not written
Precipitation is 25-40”; approximately 9,000 to 12,000 feet in elevation – Subalpine climate zone
Precipitation is 16-25”; approximately 7,000 to 9,000 feet in elevation Mountain climate zone
Soils depth is greater than 60 inches; family particle size is loamy-skeletal; parent material, rhyolite, granite, gneiss, volcanic rock metamorphic
R048AY011NM – Subalpine Grassland Dry
R048AY011NM – Subalpine Grassland Dry
Site not as above not written or see Colorado MLRA 48A key for more sites
Precipitation 9-12 inches(ustic bordering on aridic moisture regime); frigid temperature regime; approximately 6,000-8,000 feet in elevation – Semidesert climate zone
Precipitation is 12-16 inches (aridic bordering on ustic moisture regime); frigid temperature regime; approximately 7,000 -8,500 feet in elevation - Dry Mountain/foothills/ climate zone (Note: This climate zone is called Upland in Utah sites.)
Precipitation 16-20 inches (typic ustic moisture regime); frigid or cryic temperature regime; approximately 7,000-9,000 feet in elevation – Mountains climate zone
Precipitation 20-40 inches (ustic udic and typic udic); cryic temperature regime; below tree-line; approximately 8,000 – 10,000 feet in elevation - Subalpine Climate zone
Precipitation is 30-50 inches (Typic Udic); cryic temperature regime; above tree-line; approximately 10,000-14,440 feet in elevation - Alpine Climate Zone
Site has bedrock within 20 inches of the soil surface
Site not as above - soil depth is greater than 20 inches
Family particle size is clayey
Site not as above - not written
Parent material – sandstone and/or shale
R048AY015NM – Mountain Shale Dry
R048AY015NM – Mountain Shale Dry
Site not as above
Parent material - igneous rock and/or metamorphic rock
R048AY010NM – Pine Grassland
R048AY010NM – Pine Grassland
Site not as above - not written
Site has greater than 35% rock fragments
Site not as above; less than 35% rock fragments
Family particle size is clayey-skeletal; parent material is igneous rock and/or metamorphic rock
R048AY010NM – Pine Grassland
R048AY010NM – Pine Grassland
site not as above
Family particle size is loamy-skeletal; parent material is igneous rock and/or metamorphic rock
R048AY009NM – Mountain Breaks
R048AY009NM – Mountain Breaks
Site not as above
Family particle size is loamy-skeletal; parent material is rhyolite, tuff, sandstone and/or shale
R048AY012NM – Mountain Loam Dry
R048AY012NM – Mountain Loam Dry
Site not as above - not written
Family particle size is fine; parent material is sandstone and/or shale
Site not as above
Surface texture is loam and soil depth is greater than 20 inches
R048AY013NM – Mountain Slopes
R048AY013NM – Mountain Slopes
Site not as above
Surface texture clay loam or channery clay loam; soils are 20-40 inches in depth
R048AY015NM – Mountain Shale Dry
R048AY015NM – Mountain Shale Dry
Site not as above - not written
Family particle size is fine-loamy
Site not as above - not written
Parent material is igneous rock and/or metamorphic rock, soil surface texture is gravelly loam, soil depth greater than 60 inches
R048AY009NM – Mountain Breaks
R048AY009NM – Mountain Breaks
Site not as above
Parent material is rhyolite, tuff, sandstone and/or shale; soil surface texture is loam or silt loam, soil depth greater than 60 inches
R048AY012NM – Mountain Loam Dry
R048AY012NM – Mountain Loam Dry
Site not as above - not written
No water table or run-in moisture; soil depth is 20-40 inches; family particle size is fine-loamy; soil surface is sandy loam
R048AY270CO – Valley Bench
R048AY270CO – Valley Bench
Site not as above - Not Applicable
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
Site receives no extra water beyond normal precipitation
Site has water table 12-72 inches in depth; soil depth is greater than 60 inches; family particle size is fine loamy; soil surface texture is loam
R048AY243CO – Swale Meadow
R048AY243CO – Swale Meadow
Site is not as above
Site in landscape position and receives run-in water, no water table in 6 feet; family particle size is fine-loamy; soil surface texture is loam, sandy loam, clay loam or gravelly sandy clay loam
R048AY285CO – Foothill Swale
R048AY285CO – Foothill Swale
Site not as above - Not Applicable
Site has bedrock within 20 inches of the soil surface (shallow soil)
Site not as above, site is greater than 20 inches to bedrock
Site is located in the Gunnison Basin
Site not as above
Parent material is granite, gneiss, family particle size is loamy; soil surface texture is very gravely loam, very gravelly sandy loam or gravelly loam
R048AA235CO – Dry Exposure Gunnison Basin LRU
R048AA235CO – Dry Exposure Gunnison Basin LRU
Site not as above - Not Applicable
Family particle size is clayey
Site not as above
Parent material sandstone and/or shale; surface texture is channery loam, very channery loam, flaggy clay loam, channery silty clay loam, sandy loam, or gravelly coarse sandy loam
R048AY235CO – Dry Exposure
R048AY235CO – Dry Exposure
Site not as above - Not Applicable
Family particle size is loamy-skeletal
Site not as above
Parent material sandstone, and/or siltstone; surface texture is loam, sandy loam, channery loam, or very gravelly loam
F048AY448CO – Mountain Pinyon
F048AY448CO – Mountain Pinyon
Parent material sandstone and/or shale; surface texture is channery loam, very channery loam, flaggy clay loam, channery silty clay loam, sandy loam, or gravelly coarse sandy loam
R048AY235CO – Dry Exposure
R048AY235CO – Dry Exposure
Site not as above - Not Applicable
Family particle size is loamy
Site not as above - Not Applicable
Parent material sandstone, and/or siltstone; surface texture is loam, sandy loam, channery loam, or very gravelly loam
F048AY448CO – Mountain Pinyon
F048AY448CO – Mountain Pinyon
Parent material sandstone and/or shale; surface texture is channery loam, very channery loam, flaggy clay loam, channery silty clay loam, sandy loam, or gravelly coarse sandy loam
R048AY235CO – Dry Exposure
R048AY235CO – Dry Exposure
Parent material limestone or sandstone; surface texture is sandy loam or gravelly sandy loam
R048AY307CO – Shallow Slopes
R048AY307CO – Shallow Slopes
Site not as above - Not Applicable
Soils are skeletal soils (greater than 35% rock fragments)
Site not as above, soils are non-skeletal (less than 35% rock fragments
Family particle size is loamy-skeletal
Site is not loamy-skeletal family particle size
Site occurs as long narrow belts on fan terraces, alluvial fans and glacial outwash plains adjacent to the Arkansas River
Site not as above
Parent material is outwash and alluvium; surface texture is stony sandy loam or very gravelly loamy sand
R048AY282CO – Boulder Flats
R048AY282CO – Boulder Flats
Site not as above - Not Applicable
Parent material is basalt, sandstone, and/or shale; soil surface is stony sandy loam, gravelly sandy loam, very cobbly loam, or very stony sandy loam; slope is 3-30%
R048AY287CO – Stony Foothills
R048AY287CO – Stony Foothills
Parent material shale, sandstone, and/or basalt, surface texture is cobbly sandy loam, cobbly loam, very flaggy loam or channery loam; slope is 25-65%
R048AY303CO – Loamy Slopes
R048AY303CO – Loamy Slopes
Site not as above - Not Applicable
Family particle size is sandy-skeletal, soil surface texture is generally a gravelly sandy loam; site occurs on fan terraces and alluvial fans
R048AY316CO – Dry Mountain Outwash
R048AY316CO – Dry Mountain Outwash
Site not as above - Not Applicable
Family particle size is fine
Site not as above
Parent material is sandstone and shale; surface texture is a loam
R048AY244CO – Mountain Shale
R048AY244CO – Mountain Shale
Site not as above - Not Applicable
Family particle size is coarse-loamy.
Site not as above
Parent material is alluvium; surface textures is sandy loam, gravelly sandy loam, or gravelly loam
R048AY272CO – Sandy Bench
R048AY272CO – Sandy Bench
Site not as above - Not Applicable
Family particle size is fine-loamy
Site not as above - Not Applicable
Located in the Gunnison Basin
Site not as above
Parent material is rhyolite, sedimentary rock, or granite; soil surface textures is gravelly sandy loam or fine sandy loam
R048AA231CO – Dry Mountain Loam Gunnison Basin LRU
R048AA231CO – Dry Mountain Loam Gunnison Basin LRU
Site not as above - Not Applicable
Parent material is sedimentary rock, basalt or sandstone; soil surface texture is loam
R048AY231CO – Dry Mountain Loam
R048AY231CO – Dry Mountain Loam
Parent material is sandstone and shale, or basalt; soil surface texture is loam, very channery loam, or sandy clay loam
R048AY292CO – Deep Loam
R048AY292CO – Deep Loam
Parent material is sandstone and shale; soil surface texture is loam
R048AY242CO – Dry Mountain Shale
R048AY242CO – Dry Mountain Shale
Site is located in the Wescliffe area, parent material is alluvium, colluvium and eolian materials; soil surface is sandy loam or gravelly sandy loam
R048AY226CO – Mountain Loam 13-18 PZ Westcliffe Area
R048AY226CO – Mountain Loam 13-18 PZ Westcliffe Area
Site not as above - Not Applicable
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
Site receives no extra water beyond normal precipitation
Site has perennial water table 0-24 inches in depth; soil depth is greater 40 inches; family particle size is fine-loamy or fine
Site not as above
Site located in the Gunnison Basin
R048AA241CO – Mountain Meadow Gunnison Basin LRU
R048AA241CO – Mountain Meadow Gunnison Basin LRU
Site not as above
R048AY241CO – Mountain Meadow
R048AY241CO – Mountain Meadow
Site located in the Gunnison Basin
Site not as above
Water table 60 inches or greater in depth and seasonally in early spring; family particle size is fine-loamy
R048AA245CO – Mountain Swale Gunnison Basin LRU
R048AA245CO – Mountain Swale Gunnison Basin LRU
Site not as above - Not Applicable
Site in landscape position that receives run-in water; 60 inches or greater in depth; no water table present in 6 feet; family particle size – fine-loamy
R048AY245CO – Mountain Swale
R048AY245CO – Mountain Swale
Site not as above - Not Applicable
Site has bedrock within 20 inches of the soil surface (shallow soil)
Site not as above, site is greater than 20 inches to bedrock
Family particle size is loamy
Site not as above
Parent material is tachylyte, volcanic breccia, igneous rock, tuff, granite, gneiss and/or sandstone; surface soil textures isgravelly sandy loam, channery loam, or fine sandy loam
R048AY230CO – Shallow Loam
R048AY230CO – Shallow Loam
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam
R048AY255CO – Pine Grasslands
R048AY255CO – Pine Grasslands
Site not as above - Not Applicable
Site is loamy-skeletal
Site not as above - Not Applicable
Parent material is granite, gneiss, phyllite, schist, sandstone and/or limestone; Soil surface texture is gravelly sandy loam, channery loam or fine sandy loam
R048AY229CO – Rocky Loam
R048AY229CO – Rocky Loam
Parent material is tachylyte, volcanic breccia, igneous rock, tuff, granite, gneiss and/or sandstone; surface soil textures isgravelly sandy loam, channery loam, or fine sandy loam
R048AY230CO – Shallow Loam
R048AY230CO – Shallow Loam
Parent material is monzonite, granite, gneiss and/or granodiorite; surface soil textures is very gravelly sandy loam
R048AY218CO – Dry Shallow Pine
R048AY218CO – Dry Shallow Pine
Parent material is volcanic breccia, granite, gneiss, sandstone, and/or granodiorite; surface soil textures is very gravelly sandy loam, gravelly sandy loam, or very gravelly loam
R048AY240CO – Shallow Pine
R048AY240CO – Shallow Pine
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam
R048AY255CO – Pine Grasslands
R048AY255CO – Pine Grasslands
Site not as above - Not Applicable
Soils are skeletal soils (greater than 35% rock fragments)
Site not as above, soils are non-skeletal (less than 35% rock fragments
Family particle size is sandy-skeletal
Site not as above
Parent material is alluvium and outwash; surface texture is gravelly sandy loam or stony sandy loam
R048AY311CO – Mountain Outwash
R048AY311CO – Mountain Outwash
Site not as above - Not Applicable
Family particle size is clayey-skeletal
Site not as above
Parent material is sandstone and/or shale; surface texture is loam or clay loam
R048AY238CO – Brushy Loam
R048AY238CO – Brushy Loam
Parent material is igneous, metamorphic and sedimentary rock; surface texture is very gravelly sandy clay loam, very stony loam or gravelly loam
R048AY239CO – Brushy Mountain Loam
R048AY239CO – Brushy Mountain Loam
Soils are > 40” in depth; surface texture very gravelly, gravelly or very cobbly loam or very sandy loam.
R048AY377CO – Skeletal Loam
R048AY377CO – Skeletal Loam
Family particle size is loamy-skeletal
Site not as above - Not Applicable
Parent material is basalt, sandstone, till, outwash, schist, granite, gneiss, igneous and/or metamorphic rock; soil surface texture is stony loam, extremely stony loam, cobbly loam, very stony loam, cobbly sandy loam or very cobbly sandy loam
R048AY237CO – Stony Loam
R048AY237CO – Stony Loam
Parent material is sandstone and/or shale; surface texture is loam or clay loam
R048AY238CO – Brushy Loam
R048AY238CO – Brushy Loam
Parent material is igneous, metamorphic and sedimentary rock; surface texture is very gravelly sandy clay loam, very stony loam or gravelly loam
R048AY239CO – Brushy Mountain Loam
R048AY239CO – Brushy Mountain Loam
Site not as above - Not Applicable
Family particle size is fine-silty
Site not as above
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam
R048AY255CO – Pine Grasslands
R048AY255CO – Pine Grasslands
Site not as above - Not Applicable
Family particle size is fine-loamy
Site not as above
Located in the Gunnison Basin
Site not as above
Parent material is rhyolite, granite volcanic rock, sedimentary rock, igneous and/or metamorphic rock; surface texture is loam or gravelly sandy loam
R048AA228CO – Mountain Loam Gunnison Basin LRU
R048AA228CO – Mountain Loam Gunnison Basin LRU
Site not as above - Not Applicable
Parent material is sandstone, shale, igneous rock, metamorphic rock, schist, and/or granite. Surface texture is loam, sandy loam, gravelly sandy loam or silt loam; 0-30% slope
R048AY228CO – Mountain Loam
R048AY228CO – Mountain Loam
Parent material is granite, gneiss, schist, sandstone, shale, igneous rock and/or metamorphic rock, surface texture is loam or sandy loam, slope 0-30%
R048AY222CO – Loamy Park
R048AY222CO – Loamy Park
Parent material is igneous, metamorphic and/or sedimentary rock; surface texture is very gravelly sandy clay loam, very stony loam or gravelly loam; 3-50% slope
R048AY239CO – Brushy Mountain Loam
R048AY239CO – Brushy Mountain Loam
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam; 0-30% slope
R048AY255CO – Pine Grasslands
R048AY255CO – Pine Grasslands
Parent material is sandstone; surface texture is cobbly fine sandy loam; slope is 25-75%
R048AY379CO – Brushy Slopes
R048AY379CO – Brushy Slopes
Site not as above - Not Applicable
Family particle size is fine
Site not as above - Not Applicable
Located on the western slope in Colorado around the Grand Mesa to the North/West part of the San Juan Mountains and the Gunnison Basin (Shale Highlands LRU); parent material is Mancos/ Wasatch shale and/or siltstone; surface texture is clay loam, silty clay loam or loam
R048AA247CO – Deep Clay Loam Shale Highlands LRU
R048AA247CO – Deep Clay Loam Shale Highlands LRU
Not located in Shale Highland LRU (Grand Mesa to the North/West part of the San Juan Mountains and the Gunnison Basin); Parent material is shale, igneous rock, metamorphic rock and/or sedimentary rock, surface texture is clay loam, loam, or silt loam
R048AY247CO – Deep Clay Loam
R048AY247CO – Deep Clay Loam
Parent material sandstone and/or shale. Surface texture is loam, clay loam, very stony loam, cobbly loam, sandy loam, cobbly sandy loam, very bouldery sandy loam, or fine sandy loam
F048AY925CO – Ponderosa Pine Forest
F048AY925CO – Ponderosa Pine Forest
Parent material sandstone and shale; surface texture is loam, clay loam, or very cobbly loam
R048AY234CO – Mountain Clay
R048AY234CO – Mountain Clay
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam
R048AY255CO – Pine Grasslands
R048AY255CO – Pine Grasslands
Parent material is shale, sandstone and/or siltstone; surface texture is clay loam, loam, gravelly loam, or silty clay loam
R048AY248CO – Mountain Clay Loam
R048AY248CO – Mountain Clay Loam
Parent material is shale and/or sandstone; surface textures is clay loam or loam
R048AY257CO – Clayey Valley
R048AY257CO – Clayey Valley
Site not as above - Not Applicable
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
Site receives no extra water beyond normal precipitation
Site occurs on the Grand Mesa; precipitation is 37-45 inches; Site in landscape position and receives run-in water; 20 inches or greater in depth; no water table present in 6 feet; family particle size is fine-loamy, clayey-skeletal or loamy-skeletal; soil surface texture is loam or gravelly loam
R048AY253CO – Wet Subalpine
R048AY253CO – Wet Subalpine
Site not as above - Not Applicable
Site has bedrock within 20 inches of the soil surface
Not as above, site is greater than 20 inches in depth to bedrock
Family particle size is loamy
Site not as above
Precipitation is 20-30 inches; Parent material is sandstone, shale; basalt, andesite, tuff breccia and/or rhyolite; surface texture – loam, channery loam, sandy loam, extremely stony loam, gravelly silt loam or gravelly loam
R048AY251CO – Shallow Subalpine
R048AY251CO – Shallow Subalpine
Site not as above - Not Applicable
Family particle size is clayey-skeletal
Site not as above
Precipitation is 20-30 inches; parent material is shale and/or sandstone; surface texture is very gravelly loam, fine sandy loam or cobbly fine sandy loam
F048AY912CO – Lodgepole Pine
F048AY912CO – Lodgepole Pine
Site not as above - Not Applicable
Family particle size is loamy-skeletal
Site not as above - Not Applicable
Precipitation is 20-30 inches; Parent material is sandstone, shale; basalt, andesite, tuff breccia and/or rhyolite; surface texture – loam, channery loam, sandy loam, extremely stony loam, gravelly silt loam or gravelly loam
R048AY251CO – Shallow Subalpine
R048AY251CO – Shallow Subalpine
Precipitation is 20-30 inches; parent material is shale and/or sandstone; surface texture is very gravelly loam, fine sandy loam or cobbly fine sandy loam
F048AY912CO – Lodgepole Pine
F048AY912CO – Lodgepole Pine
Site not as above - Not Applicable
Rock fragments greater than 35%
Site is not as above, rock fragments less than 35%
Family particle size is clayey-skeletal
Site not as above
Precipitation is 20-30 inches; parent material is shale and/or sandstone; surface texture is very gravelly loam, fine sandy loam or cobbly fine sandy loam
F048AY912CO – Lodgepole Pine
F048AY912CO – Lodgepole Pine
Precipitation is 20-30 inches; parent material is igneous, metamorphic rock, sedimentary rock; sandstone and shale, diorite and or rhyolite; surface texture is loam, stony loam, very stony loam, cobbly loam, gravelly loam or very cobbly loam
F048AY449CO – Aspen Woodland
F048AY449CO – Aspen Woodland
Precipitation is 20-40 inches; parent material is igneous rock, metamorphic rock, sedimentary rock, sandstone and shale and/or volcanic breccia; surface texture is very cobbly sandy loam, very gravelly sandy loam very stony sandy loam, very cobbly fine sandy loam, stony fine sandy loam, loam, cobbly loam or gravelly loam
F048AY918CO – Spruce-Fir Woodland
F048AY918CO – Spruce-Fir Woodland
Site not as above - Not Applicable
Family particle size is Loamy-skeletal
Site not as above - Not Applicable
Precipitation is 20 to 25 inches; parent material is sandstone and shale, andesite, or sedimentary rock; surface texture is very stony loam, loam, clay loam, stony sandy clay loam, or very stony sandy loam
F048AY924CO – Douglas Fir/Gambel Oak
F048AY924CO – Douglas Fir/Gambel Oak
Precipitation is 20-30 inches; parent material is igneous, metamorphic rock, sedimentary rock; sandstone and shale, diorite and or rhyolite; surface texture is loam, stony loam, very stony loam, cobbly loam, gravelly loam or very cobbly loam
F048AY449CO – Aspen Woodland
F048AY449CO – Aspen Woodland
Precipitation is 20-30 inches; parent material is shale and/or sandstone; surface texture is very gravelly loam, fine sandy loam or cobbly fine sandy loam
F048AY912CO – Lodgepole Pine
F048AY912CO – Lodgepole Pine
Precipitation is 20-40 inches; parent material is granite, sandstone and shale, volcanic rock, gneiss, mica schist, or sandstone; surface textures is loam, very gravelly sandy loam, very stony sandy loam, stony sandy loam, stony loam, very stony loam, very cobbly loam, or gravelly fine sandy loam
F048AY908CO – Mixed Conifer
F048AY908CO – Mixed Conifer
Precipitation is 20-40 inches; parent material is volcanic breccia; surface texture is cobbly ashy loam, cobbly ashy silt loam or cobbly loam
F048AY915CO – Engelmann Spruce – Whortleberry– Jacob's-Ladder
F048AY915CO – Engelmann Spruce – Whortleberry– Jacob's-Ladder
Precipitation is 20-40 inches; parent material is volcanic breccia or sandstone; surface textures is stony loam, stony ashy loam, or cobbly ashy loam
F048AY917CO – Abies lasiocarpa/Paxistima myrsinites/Erigeron eximius
F048AY917CO – Abies lasiocarpa/Paxistima myrsinites/Erigeron eximius
Precipitation is 20-40 inches; parent material is volcanic breccia; surface textures is very stony ashy loam
F048AY919CO – Subalpine Fir/Blueberry/Twinflower
F048AY919CO – Subalpine Fir/Blueberry/Twinflower
Precipitation is 20-40 inches; parent material is volcanic breccia or tuff; surface textures is stony ashy loam or cobbly loam
F048AY921CO – White Fir/Snowberry
F048AY921CO – White Fir/Snowberry
Precipitation is 20-40 inches; parent material is igneous rock, metamorphic rock, sedimentary rock, sandstone and shale and/or volcanic breccia; surface texture is very cobbly sandy loam, very gravelly sandy loam very stony sandy loam, very cobbly fine sandy loam, stony fine sandy loam, loam, cobbly loam or gravelly loam
F048AY918CO – Spruce-Fir Woodland
F048AY918CO – Spruce-Fir Woodland
Site not as above - Not applicable
Family particle size is fine
Site not as above
Precipitation is 20-30 inches; parent material is igneous, metamorphic rock, sedimentary rock; sandstone and shale, diorite and or rhyolite; surface texture is loam, stony loam, very stony loam, cobbly loam, gravelly loam or very cobbly loam
F048AY449CO – Aspen Woodland
F048AY449CO – Aspen Woodland
Precipitation is 20-30 inches; parent material is sandstone and shale; or igneous, metamorphic and sedimentary rock; surface texture is loam, clay loam or silt loam
R048AY252CO – Subalpine Clay
R048AY252CO – Subalpine Clay
Site not as above - Not Applicable
Family particle size is fine-loamy
Site not as above - Not Applicable
Precipitation is 20 to 25 inches; parent material is sandstone and shale, andesite, or sedimentary rock; surface texture is very stony loam, loam, clay loam, stony sandy clay loam, or very stony sandy loam
F048AY924CO – Douglas Fir/Gambel Oak
F048AY924CO – Douglas Fir/Gambel Oak
Located in Gunnison Basin; precipitation is 20-30 inches; parent materials andesite, rhyolite or sandstone and shale; surface texture is loam
R048AA250CO – Subalpine Loam Gunnison Basin LRU
R048AA250CO – Subalpine Loam Gunnison Basin LRU
Site not in the Gunnison Basin; parent material is sandstone, shale, volcanic rock, or igneous, metamorphic and sedimentary rock; surface texture is loam
R048AY250CO – Subalpine Loam
R048AY250CO – Subalpine Loam
Precipitation is 20-30 inches; parent material is igneous, metamorphic rock, sedimentary rock; sandstone and shale, diorite and or rhyolite; surface texture is loam, stony loam, very stony loam, cobbly loam, gravelly loam or very cobbly loam
F048AY449CO – Aspen Woodland
F048AY449CO – Aspen Woodland
Precipitation is 20-40 inches; parent material is granite, sandstone and shale, volcanic rock, gneiss, mica schist, or sandstone; surface textures is loam, very gravelly sandy loam, very stony sandy loam, stony sandy loam, stony loam, very stony loam, very cobbly loam, or gravelly fine sandy loam
F048AY908CO – Mixed Conifer
F048AY908CO – Mixed Conifer
Precipitation is 20-40 inches; parent material is igneous rock, metamorphic rock, sedimentary rock, sandstone and shale and/or volcanic breccia; surface texture is very cobbly sandy loam, very gravelly sandy loam very stony sandy loam, very cobbly fine sandy loam, stony fine sandy loam, loam, cobbly loam or gravelly loam
F048AY918CO – Spruce-Fir Woodland
F048AY918CO – Spruce-Fir Woodland
Site not as above - Not applicable
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
Site receives no extra water beyond normal precipitation
Site has perennial water table 0-12 inches in depth; soil depth is greater than 60 inches; soil surface texture is loam, cobbly loam or silt loam
R048AY305CO – Alpine Meadow
R048AY305CO – Alpine Meadow
Site not as above
Site occurs on the Grand Mesa; precipitation is 37-45 inches; Site in landscape position and receives run-in water; 20 inches or greater in depth; no water table present in 6 feet; family particle size is fine-loamy, clayey-skeletal or loamy-skeletal; soil surface texture is loam or gravelly loam
R048AY253CO – Wet Subalpine
R048AY253CO – Wet Subalpine
Site not as above - Not Applicable
Site have bedrock within 20 inches of the soil surface
Not as above, Site is greater than 20 inches in depth to bedrock
Family particle size is loamy or loamy-skeletal; Surface texture is very gravelly loam, very stony loam, very cobbly loam, very stony sandy loam, very cobbly sandy loam, loam or very cobbly silt loam
R048AY308CO – Shallow Alpine
R048AY308CO – Shallow Alpine
Site not as above - Not Applicable
Rock fragments greater than 35% and family particle size is loamy-skeletal
Site not as above - Not applicable
0-30% slopes
Slopes is 30-60%
Parent material is colluvium, till, basalt, rhyolite, tuff, volcanic breccia, and/or andesite; soil surface texture is very gravelly loam, cobbly loam, stony loam, or gravelly silt loam
R048AY306CO – Shrubby Alpine
R048AY306CO – Shrubby Alpine
Parent material rhyolite, tuff, volcanic rock and/or sandstone; soil surface texture is very gravelly loam, loam, or very stony sandy loam; 10-60% slopes
R048AY309CO – Warm Alpine
R048AY309CO – Warm Alpine
Site not as above - Not applicable
Parent material rhyolite, tuff, volcanic rock and/or sandstone; soil surface texture is very gravelly loam, loam, or very stony sandy loam; 10-60% slopes
R048AY309CO – Warm Alpine
R048AY309CO – Warm Alpine
Parent material is monzonite, diorite, conglomerate, rhyolite, volcanic rock sandstone, granite, gneiss, schist, andesite, tuffigneous rock and/or metamorphic rock; Surface texture is very gravelly loam, gravelly loam, extremely gravelly loam, very cobbly loam, extremely cobbly loam, very stony loam, or extremely stony sandy loam; 30-60% slopes
R048AY304CO – Alpine Slopes
R048AY304CO – Alpine Slopes
Site not as above - Not applicable
No water table or run-in moisture; soil depth is 20-40 inches; family particle size is fine-loamy; soil surface is sandy loam
R048AY270CO – Valley Bench
R048AY270CO – Valley Bench
Site not as above - Not Applicable
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
Site receives no extra water beyond normal precipitation
Site has water table 12-72 inches in depth; soil depth is greater than 60 inches; family particle size is fine loamy; soil surface texture is loam
R048AY243CO – Swale Meadow
R048AY243CO – Swale Meadow
Site is not as above
Site in landscape position and receives run-in water, no water table in 6 feet; family particle size is fine-loamy; soil surface texture is loam, sandy loam, clay loam or gravelly sandy clay loam
R048AY285CO – Foothill Swale
R048AY285CO – Foothill Swale
Site not as above - Not Applicable
Site has bedrock within 20 inches of the soil surface (shallow soil)
Site not as above, site is greater than 20 inches to bedrock
Site is located in the Gunnison Basin
Site not as above
Parent material is granite, gneiss, family particle size is loamy; soil surface texture is very gravely loam, very gravelly sandy loam or gravelly loam
R048AA235CO – Dry Exposure Gunnison Basin LRU
R048AA235CO – Dry Exposure Gunnison Basin LRU
Site not as above - Not Applicable
Family particle size is clayey
Site not as above
Parent material sandstone and/or shale; surface texture is channery loam, very channery loam, flaggy clay loam, channery silty clay loam, sandy loam, or gravelly coarse sandy loam
R048AY235CO – Dry Exposure
R048AY235CO – Dry Exposure
Site not as above - Not Applicable
Family particle size is loamy-skeletal
Site not as above
Parent material sandstone, and/or siltstone; surface texture is loam, sandy loam, channery loam, or very gravelly loam
F048AY448CO – Mountain Pinyon
F048AY448CO – Mountain Pinyon
Parent material sandstone and/or shale; surface texture is channery loam, very channery loam, flaggy clay loam, channery silty clay loam, sandy loam, or gravelly coarse sandy loam
R048AY235CO – Dry Exposure
R048AY235CO – Dry Exposure
Site not as above - Not Applicable
Family particle size is loamy
Site not as above - Not Applicable
Parent material sandstone, and/or siltstone; surface texture is loam, sandy loam, channery loam, or very gravelly loam
F048AY448CO – Mountain Pinyon
F048AY448CO – Mountain Pinyon
Parent material sandstone and/or shale; surface texture is channery loam, very channery loam, flaggy clay loam, channery silty clay loam, sandy loam, or gravelly coarse sandy loam
R048AY235CO – Dry Exposure
R048AY235CO – Dry Exposure
Parent material limestone or sandstone; surface texture is sandy loam or gravelly sandy loam
R048AY307CO – Shallow Slopes
R048AY307CO – Shallow Slopes
Site not as above - Not Applicable
Soils are skeletal soils (greater than 35% rock fragments)
Site not as above, soils are non-skeletal (less than 35% rock fragments
Family particle size is loamy-skeletal
Site is not loamy-skeletal family particle size
Site occurs as long narrow belts on fan terraces, alluvial fans and glacial outwash plains adjacent to the Arkansas River
Site not as above
Parent material is outwash and alluvium; surface texture is stony sandy loam or very gravelly loamy sand
R048AY282CO – Boulder Flats
R048AY282CO – Boulder Flats
Site not as above - Not Applicable
Parent material is basalt, sandstone, and/or shale; soil surface is stony sandy loam, gravelly sandy loam, very cobbly loam, or very stony sandy loam; slope is 3-30%
R048AY287CO – Stony Foothills
R048AY287CO – Stony Foothills
Parent material shale, sandstone, and/or basalt, surface texture is cobbly sandy loam, cobbly loam, very flaggy loam or channery loam; slope is 25-65%
R048AY303CO – Loamy Slopes
R048AY303CO – Loamy Slopes
Site not as above - Not Applicable
Family particle size is sandy-skeletal, soil surface texture is generally a gravelly sandy loam; site occurs on fan terraces and alluvial fans
R048AY316CO – Dry Mountain Outwash
R048AY316CO – Dry Mountain Outwash
Site not as above - Not Applicable
Family particle size is fine
Site not as above
Parent material is sandstone and shale; surface texture is a loam
R048AY244CO – Mountain Shale
R048AY244CO – Mountain Shale
Site not as above - Not Applicable
Family particle size is coarse-loamy.
Site not as above
Parent material is alluvium; surface textures is sandy loam, gravelly sandy loam, or gravelly loam
R048AY272CO – Sandy Bench
R048AY272CO – Sandy Bench
Site not as above - Not Applicable
Family particle size is fine-loamy
Site not as above - Not Applicable
Located in the Gunnison Basin
Site not as above
Parent material is rhyolite, sedimentary rock, or granite; soil surface textures is gravelly sandy loam or fine sandy loam
R048AA231CO – Dry Mountain Loam Gunnison Basin LRU
R048AA231CO – Dry Mountain Loam Gunnison Basin LRU
Site not as above - Not Applicable
Parent material is sedimentary rock, basalt or sandstone; soil surface texture is loam
R048AY231CO – Dry Mountain Loam
R048AY231CO – Dry Mountain Loam
Parent material is sandstone and shale, or basalt; soil surface texture is loam, very channery loam, or sandy clay loam
R048AY292CO – Deep Loam
R048AY292CO – Deep Loam
Parent material is sandstone and shale; soil surface texture is loam
R048AY242CO – Dry Mountain Shale
R048AY242CO – Dry Mountain Shale
Site is located in the Wescliffe area, parent material is alluvium, colluvium and eolian materials; soil surface is sandy loam or gravelly sandy loam
R048AY226CO – Mountain Loam 13-18 PZ Westcliffe Area
R048AY226CO – Mountain Loam 13-18 PZ Westcliffe Area
Site not as above - Not Applicable
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
Site receives no extra water beyond normal precipitation
Site has perennial water table 0-24 inches in depth; soil depth is greater 40 inches; family particle size is fine-loamy or fine
Site not as above
Site located in the Gunnison Basin
R048AA241CO – Mountain Meadow Gunnison Basin LRU
R048AA241CO – Mountain Meadow Gunnison Basin LRU
Site not as above
R048AY241CO – Mountain Meadow
R048AY241CO – Mountain Meadow
Site located in the Gunnison Basin
Site not as above
Water table 60 inches or greater in depth and seasonally in early spring; family particle size is fine-loamy
R048AA245CO – Mountain Swale Gunnison Basin LRU
R048AA245CO – Mountain Swale Gunnison Basin LRU
Site not as above - Not Applicable
Site in landscape position that receives run-in water; 60 inches or greater in depth; no water table present in 6 feet; family particle size – fine-loamy
R048AY245CO – Mountain Swale
R048AY245CO – Mountain Swale
Site not as above - Not Applicable
Site has bedrock within 20 inches of the soil surface (shallow soil)
Site not as above, site is greater than 20 inches to bedrock
Family particle size is loamy
Site not as above
Parent material is tachylyte, volcanic breccia, igneous rock, tuff, granite, gneiss and/or sandstone; surface soil textures isgravelly sandy loam, channery loam, or fine sandy loam
R048AY230CO – Shallow Loam
R048AY230CO – Shallow Loam
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam
R048AY255CO – Pine Grasslands
R048AY255CO – Pine Grasslands
Site not as above - Not Applicable
Site is loamy-skeletal
Site not as above - Not Applicable
Parent material is granite, gneiss, phyllite, schist, sandstone and/or limestone; Soil surface texture is gravelly sandy loam, channery loam or fine sandy loam
R048AY229CO – Rocky Loam
R048AY229CO – Rocky Loam
Parent material is tachylyte, volcanic breccia, igneous rock, tuff, granite, gneiss and/or sandstone; surface soil textures isgravelly sandy loam, channery loam, or fine sandy loam
R048AY230CO – Shallow Loam
R048AY230CO – Shallow Loam
Parent material is monzonite, granite, gneiss and/or granodiorite; surface soil textures is very gravelly sandy loam
R048AY218CO – Dry Shallow Pine
R048AY218CO – Dry Shallow Pine
Parent material is volcanic breccia, granite, gneiss, sandstone, and/or granodiorite; surface soil textures is very gravelly sandy loam, gravelly sandy loam, or very gravelly loam
R048AY240CO – Shallow Pine
R048AY240CO – Shallow Pine
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam
R048AY255CO – Pine Grasslands
R048AY255CO – Pine Grasslands
Site not as above - Not Applicable
Soils are skeletal soils (greater than 35% rock fragments)
Site not as above, soils are non-skeletal (less than 35% rock fragments
Family particle size is sandy-skeletal
Site not as above
Parent material is alluvium and outwash; surface texture is gravelly sandy loam or stony sandy loam
R048AY311CO – Mountain Outwash
R048AY311CO – Mountain Outwash
Site not as above - Not Applicable
Family particle size is clayey-skeletal
Site not as above
Parent material is sandstone and/or shale; surface texture is loam or clay loam
R048AY238CO – Brushy Loam
R048AY238CO – Brushy Loam
Parent material is igneous, metamorphic and sedimentary rock; surface texture is very gravelly sandy clay loam, very stony loam or gravelly loam
R048AY239CO – Brushy Mountain Loam
R048AY239CO – Brushy Mountain Loam
Soils are > 40” in depth; surface texture very gravelly, gravelly or very cobbly loam or very sandy loam.
R048AY377CO – Skeletal Loam
R048AY377CO – Skeletal Loam
Family particle size is loamy-skeletal
Site not as above - Not Applicable
Parent material is basalt, sandstone, till, outwash, schist, granite, gneiss, igneous and/or metamorphic rock; soil surface texture is stony loam, extremely stony loam, cobbly loam, very stony loam, cobbly sandy loam or very cobbly sandy loam
R048AY237CO – Stony Loam
R048AY237CO – Stony Loam
Parent material is sandstone and/or shale; surface texture is loam or clay loam
R048AY238CO – Brushy Loam
R048AY238CO – Brushy Loam
Parent material is igneous, metamorphic and sedimentary rock; surface texture is very gravelly sandy clay loam, very stony loam or gravelly loam
R048AY239CO – Brushy Mountain Loam
R048AY239CO – Brushy Mountain Loam
Site not as above - Not Applicable
Family particle size is fine-silty
Site not as above
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam
R048AY255CO – Pine Grasslands
R048AY255CO – Pine Grasslands
Site not as above - Not Applicable
Family particle size is fine-loamy
Site not as above
Located in the Gunnison Basin
Site not as above
Parent material is rhyolite, granite volcanic rock, sedimentary rock, igneous and/or metamorphic rock; surface texture is loam or gravelly sandy loam
R048AA228CO – Mountain Loam Gunnison Basin LRU
R048AA228CO – Mountain Loam Gunnison Basin LRU
Site not as above - Not Applicable
Parent material is sandstone, shale, igneous rock, metamorphic rock, schist, and/or granite. Surface texture is loam, sandy loam, gravelly sandy loam or silt loam; 0-30% slope
R048AY228CO – Mountain Loam
R048AY228CO – Mountain Loam
Parent material is granite, gneiss, schist, sandstone, shale, igneous rock and/or metamorphic rock, surface texture is loam or sandy loam, slope 0-30%
R048AY222CO – Loamy Park
R048AY222CO – Loamy Park
Parent material is igneous, metamorphic and/or sedimentary rock; surface texture is very gravelly sandy clay loam, very stony loam or gravelly loam; 3-50% slope
R048AY239CO – Brushy Mountain Loam
R048AY239CO – Brushy Mountain Loam
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam; 0-30% slope
R048AY255CO – Pine Grasslands
R048AY255CO – Pine Grasslands
Parent material is sandstone; surface texture is cobbly fine sandy loam; slope is 25-75%
R048AY379CO – Brushy Slopes
R048AY379CO – Brushy Slopes
Site not as above - Not Applicable
Family particle size is fine
Site not as above - Not Applicable
Located on the western slope in Colorado around the Grand Mesa to the North/West part of the San Juan Mountains and the Gunnison Basin (Shale Highlands LRU); parent material is Mancos/ Wasatch shale and/or siltstone; surface texture is clay loam, silty clay loam or loam
R048AA247CO – Deep Clay Loam Shale Highlands LRU
R048AA247CO – Deep Clay Loam Shale Highlands LRU
Not located in Shale Highland LRU (Grand Mesa to the North/West part of the San Juan Mountains and the Gunnison Basin); Parent material is shale, igneous rock, metamorphic rock and/or sedimentary rock, surface texture is clay loam, loam, or silt loam
R048AY247CO – Deep Clay Loam
R048AY247CO – Deep Clay Loam
Parent material sandstone and/or shale. Surface texture is loam, clay loam, very stony loam, cobbly loam, sandy loam, cobbly sandy loam, very bouldery sandy loam, or fine sandy loam
F048AY925CO – Ponderosa Pine Forest
F048AY925CO – Ponderosa Pine Forest
Parent material sandstone and shale; surface texture is loam, clay loam, or very cobbly loam
R048AY234CO – Mountain Clay
R048AY234CO – Mountain Clay
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam
R048AY255CO – Pine Grasslands
R048AY255CO – Pine Grasslands
Parent material is shale, sandstone and/or siltstone; surface texture is clay loam, loam, gravelly loam, or silty clay loam
R048AY248CO – Mountain Clay Loam
R048AY248CO – Mountain Clay Loam
Parent material is shale and/or sandstone; surface textures is clay loam or loam
R048AY257CO – Clayey Valley
R048AY257CO – Clayey Valley
Site not as above - Not Applicable
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
Site receives no extra water beyond normal precipitation
Site occurs on the Grand Mesa; precipitation is 37-45 inches; Site in landscape position and receives run-in water; 20 inches or greater in depth; no water table present in 6 feet; family particle size is fine-loamy, clayey-skeletal or loamy-skeletal; soil surface texture is loam or gravelly loam
R048AY253CO – Wet Subalpine
R048AY253CO – Wet Subalpine
Site not as above - Not Applicable
Site has bedrock within 20 inches of the soil surface
Not as above, site is greater than 20 inches in depth to bedrock
Family particle size is loamy
Site not as above
Precipitation is 20-30 inches; Parent material is sandstone, shale; basalt, andesite, tuff breccia and/or rhyolite; surface texture – loam, channery loam, sandy loam, extremely stony loam, gravelly silt loam or gravelly loam
R048AY251CO – Shallow Subalpine
R048AY251CO – Shallow Subalpine
Site not as above - Not Applicable
Family particle size is clayey-skeletal
Site not as above
Precipitation is 20-30 inches; parent material is shale and/or sandstone; surface texture is very gravelly loam, fine sandy loam or cobbly fine sandy loam
F048AY912CO – Lodgepole Pine
F048AY912CO – Lodgepole Pine
Site not as above - Not Applicable
Family particle size is loamy-skeletal
Site not as above - Not Applicable
Precipitation is 20-30 inches; Parent material is sandstone, shale; basalt, andesite, tuff breccia and/or rhyolite; surface texture – loam, channery loam, sandy loam, extremely stony loam, gravelly silt loam or gravelly loam
R048AY251CO – Shallow Subalpine
R048AY251CO – Shallow Subalpine
Precipitation is 20-30 inches; parent material is shale and/or sandstone; surface texture is very gravelly loam, fine sandy loam or cobbly fine sandy loam
F048AY912CO – Lodgepole Pine
F048AY912CO – Lodgepole Pine
Site not as above - Not Applicable
Rock fragments greater than 35%
Site is not as above, rock fragments less than 35%
Family particle size is clayey-skeletal
Site not as above
Precipitation is 20-30 inches; parent material is shale and/or sandstone; surface texture is very gravelly loam, fine sandy loam or cobbly fine sandy loam
F048AY912CO – Lodgepole Pine
F048AY912CO – Lodgepole Pine
Precipitation is 20-30 inches; parent material is igneous, metamorphic rock, sedimentary rock; sandstone and shale, diorite and or rhyolite; surface texture is loam, stony loam, very stony loam, cobbly loam, gravelly loam or very cobbly loam
F048AY449CO – Aspen Woodland
F048AY449CO – Aspen Woodland
Precipitation is 20-40 inches; parent material is igneous rock, metamorphic rock, sedimentary rock, sandstone and shale and/or volcanic breccia; surface texture is very cobbly sandy loam, very gravelly sandy loam very stony sandy loam, very cobbly fine sandy loam, stony fine sandy loam, loam, cobbly loam or gravelly loam
F048AY918CO – Spruce-Fir Woodland
F048AY918CO – Spruce-Fir Woodland
Site not as above - Not Applicable
Family particle size is Loamy-skeletal
Site not as above - Not Applicable
Precipitation is 20 to 25 inches; parent material is sandstone and shale, andesite, or sedimentary rock; surface texture is very stony loam, loam, clay loam, stony sandy clay loam, or very stony sandy loam
F048AY924CO – Douglas Fir/Gambel Oak
F048AY924CO – Douglas Fir/Gambel Oak
Precipitation is 20-30 inches; parent material is igneous, metamorphic rock, sedimentary rock; sandstone and shale, diorite and or rhyolite; surface texture is loam, stony loam, very stony loam, cobbly loam, gravelly loam or very cobbly loam
F048AY449CO – Aspen Woodland
F048AY449CO – Aspen Woodland
Precipitation is 20-30 inches; parent material is shale and/or sandstone; surface texture is very gravelly loam, fine sandy loam or cobbly fine sandy loam
F048AY912CO – Lodgepole Pine
F048AY912CO – Lodgepole Pine
Precipitation is 20-40 inches; parent material is granite, sandstone and shale, volcanic rock, gneiss, mica schist, or sandstone; surface textures is loam, very gravelly sandy loam, very stony sandy loam, stony sandy loam, stony loam, very stony loam, very cobbly loam, or gravelly fine sandy loam
F048AY908CO – Mixed Conifer
F048AY908CO – Mixed Conifer
Precipitation is 20-40 inches; parent material is volcanic breccia; surface texture is cobbly ashy loam, cobbly ashy silt loam or cobbly loam
F048AY915CO – Engelmann Spruce – Whortleberry– Jacob's-Ladder
F048AY915CO – Engelmann Spruce – Whortleberry– Jacob's-Ladder
Precipitation is 20-40 inches; parent material is volcanic breccia or sandstone; surface textures is stony loam, stony ashy loam, or cobbly ashy loam
F048AY917CO – Abies lasiocarpa/Paxistima myrsinites/Erigeron eximius
F048AY917CO – Abies lasiocarpa/Paxistima myrsinites/Erigeron eximius
Precipitation is 20-40 inches; parent material is volcanic breccia; surface textures is very stony ashy loam
F048AY919CO – Subalpine Fir/Blueberry/Twinflower
F048AY919CO – Subalpine Fir/Blueberry/Twinflower
Precipitation is 20-40 inches; parent material is volcanic breccia or tuff; surface textures is stony ashy loam or cobbly loam
F048AY921CO – White Fir/Snowberry
F048AY921CO – White Fir/Snowberry
Precipitation is 20-40 inches; parent material is igneous rock, metamorphic rock, sedimentary rock, sandstone and shale and/or volcanic breccia; surface texture is very cobbly sandy loam, very gravelly sandy loam very stony sandy loam, very cobbly fine sandy loam, stony fine sandy loam, loam, cobbly loam or gravelly loam
F048AY918CO – Spruce-Fir Woodland
F048AY918CO – Spruce-Fir Woodland
Site not as above - Not applicable
Family particle size is fine
Site not as above
Precipitation is 20-30 inches; parent material is igneous, metamorphic rock, sedimentary rock; sandstone and shale, diorite and or rhyolite; surface texture is loam, stony loam, very stony loam, cobbly loam, gravelly loam or very cobbly loam
F048AY449CO – Aspen Woodland
F048AY449CO – Aspen Woodland
Precipitation is 20-30 inches; parent material is sandstone and shale; or igneous, metamorphic and sedimentary rock; surface texture is loam, clay loam or silt loam
R048AY252CO – Subalpine Clay
R048AY252CO – Subalpine Clay
Site not as above - Not Applicable
Family particle size is fine-loamy
Site not as above - Not Applicable
Precipitation is 20 to 25 inches; parent material is sandstone and shale, andesite, or sedimentary rock; surface texture is very stony loam, loam, clay loam, stony sandy clay loam, or very stony sandy loam
F048AY924CO – Douglas Fir/Gambel Oak
F048AY924CO – Douglas Fir/Gambel Oak
Located in Gunnison Basin; precipitation is 20-30 inches; parent materials andesite, rhyolite or sandstone and shale; surface texture is loam
R048AA250CO – Subalpine Loam Gunnison Basin LRU
R048AA250CO – Subalpine Loam Gunnison Basin LRU
Site not in the Gunnison Basin; parent material is sandstone, shale, volcanic rock, or igneous, metamorphic and sedimentary rock; surface texture is loam
R048AY250CO – Subalpine Loam
R048AY250CO – Subalpine Loam
Precipitation is 20-30 inches; parent material is igneous, metamorphic rock, sedimentary rock; sandstone and shale, diorite and or rhyolite; surface texture is loam, stony loam, very stony loam, cobbly loam, gravelly loam or very cobbly loam
F048AY449CO – Aspen Woodland
F048AY449CO – Aspen Woodland
Precipitation is 20-40 inches; parent material is granite, sandstone and shale, volcanic rock, gneiss, mica schist, or sandstone; surface textures is loam, very gravelly sandy loam, very stony sandy loam, stony sandy loam, stony loam, very stony loam, very cobbly loam, or gravelly fine sandy loam
F048AY908CO – Mixed Conifer
F048AY908CO – Mixed Conifer
Precipitation is 20-40 inches; parent material is igneous rock, metamorphic rock, sedimentary rock, sandstone and shale and/or volcanic breccia; surface texture is very cobbly sandy loam, very gravelly sandy loam very stony sandy loam, very cobbly fine sandy loam, stony fine sandy loam, loam, cobbly loam or gravelly loam
F048AY918CO – Spruce-Fir Woodland
F048AY918CO – Spruce-Fir Woodland
Site not as above - Not applicable
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
Site receives no extra water beyond normal precipitation
Site has perennial water table 0-12 inches in depth; soil depth is greater than 60 inches; soil surface texture is loam, cobbly loam or silt loam
R048AY305CO – Alpine Meadow
R048AY305CO – Alpine Meadow
Site not as above
Site occurs on the Grand Mesa; precipitation is 37-45 inches; Site in landscape position and receives run-in water; 20 inches or greater in depth; no water table present in 6 feet; family particle size is fine-loamy, clayey-skeletal or loamy-skeletal; soil surface texture is loam or gravelly loam
R048AY253CO – Wet Subalpine
R048AY253CO – Wet Subalpine
Site not as above - Not Applicable
Site have bedrock within 20 inches of the soil surface
Not as above, Site is greater than 20 inches in depth to bedrock
Family particle size is loamy or loamy-skeletal; Surface texture is very gravelly loam, very stony loam, very cobbly loam, very stony sandy loam, very cobbly sandy loam, loam or very cobbly silt loam
R048AY308CO – Shallow Alpine
R048AY308CO – Shallow Alpine
Site not as above - Not Applicable
Rock fragments greater than 35% and family particle size is loamy-skeletal
Site not as above - Not applicable
0-30% slopes
Slopes is 30-60%
Parent material is colluvium, till, basalt, rhyolite, tuff, volcanic breccia, and/or andesite; soil surface texture is very gravelly loam, cobbly loam, stony loam, or gravelly silt loam
R048AY306CO – Shrubby Alpine
R048AY306CO – Shrubby Alpine
Parent material rhyolite, tuff, volcanic rock and/or sandstone; soil surface texture is very gravelly loam, loam, or very stony sandy loam; 10-60% slopes
R048AY309CO – Warm Alpine
R048AY309CO – Warm Alpine
Site not as above - Not applicable
Parent material rhyolite, tuff, volcanic rock and/or sandstone; soil surface texture is very gravelly loam, loam, or very stony sandy loam; 10-60% slopes
R048AY309CO – Warm Alpine
R048AY309CO – Warm Alpine
Parent material is monzonite, diorite, conglomerate, rhyolite, volcanic rock sandstone, granite, gneiss, schist, andesite, tuffigneous rock and/or metamorphic rock; Surface texture is very gravelly loam, gravelly loam, extremely gravelly loam, very cobbly loam, extremely cobbly loam, very stony loam, or extremely stony sandy loam; 30-60% slopes
R048AY304CO – Alpine Slopes
R048AY304CO – Alpine Slopes
Site not as above - Not applicable
Site receives extra water beyond normal precipitation through high water table and/or run-in water
Greater than 35" annual precipitation
16" - 22" annual precipitation (except some south and west slopes or soils with poor water holding capacity), adjacent areas are capable of supporting gambel oak
12" - 16" annual precipitation. Up to 20" on south and west slopes or soils with poor water holding capacity, site is too dry to support gambel oak
Water table depth is generally 50 inches or greater below the surface and soils are loamy skelatal (>35% rock fragment)
Dominant aspect of this site is shrubs
R048AY007UT – Loamy Bottom (Basin Big Sagebrush/Basin Wildrye)
R048AY007UT – Loamy Bottom (Basin Big Sagebrush/Basin Wildrye)
Dominant aspect of this site is shrub
Soil sub-surface gravel volume is generally greater than 30% and dominant tree is narrowleaf cottonwood
Site dominated by willows, soil profile is fine loamy (low rock content, 18-35% clay)
R048AY008UT – Wet Fresh Meadow (Willow-Sedge)
R048AY008UT – Wet Fresh Meadow (Willow-Sedge)
Site dominated by willow, and soil profile is coarse loamy (<35% rock fragments)
R048AY010UT – Wet Fresh Streambank (Willow)
R048AY010UT – Wet Fresh Streambank (Willow)
Soil sub-surface gravel volume is generally greater than 30% and dominant tree is narrowleaf cottonwood
R048AY005UT – Semiwet Fresh Streambank (Narrowleaf Cottonwood)
R048AY005UT – Semiwet Fresh Streambank (Narrowleaf Cottonwood)
Soil sub-surface gravel volume is less than 10% and the dominant tree is water birch
R048AY006UT – Semiwet Fresh Streambank
R048AY006UT – Semiwet Fresh Streambank
Site is above timberline
22" - 40" annual precipitation
Gravels on surface are greater than 20% and soil profile is loamy-skeletal and fragmental (>35% rock fragments by volume)
R048AY610UT – Alpine Slope
R048AY610UT – Alpine Slope
Slope generally less than 30%
Slope generally greater than 30%
Surface soil texture loam and soil profile contains less than 10% rock fragment by volume
R048AY516UT – High Mountain Loam (Mountain Big Sagebrush)
R048AY516UT – High Mountain Loam (Mountain Big Sagebrush)
Surface soil texture loam to silt loam and soil profile contains greater than 10% rock fragment by volume
R048AY503UT – High Mountain Clay
R048AY503UT – High Mountain Clay
Soil depth is generally moderately deep to deep (20-60”) with gravels on the surface less than 15% by volume
F048AY506UT – High Mountain Loam (Aspen)
F048AY506UT – High Mountain Loam (Aspen)
Soil depth is generally moderately deep (20-40”) and are generally associated/adjacent to aspen sites dominated by herbaceous species
R048AY515UT – High Mountain Loam (Thurber Fescue)
R048AY515UT – High Mountain Loam (Thurber Fescue)
Soil depths generally shallow (< 20%) with gravelly silt loam surface texture.
R048AY518UT – High Mountain Gravelly Loam (Mountain Big Sagebrush)
R048AY518UT – High Mountain Gravelly Loam (Mountain Big Sagebrush)
Rock fragments in the top 24” generally greater than 50% by volume
Rock fragments in the top 24” generally less than 50% by volume
Surface textures are generally gravelly or cobbly loam with surface rock fragments greater than 10%
F048AY524UT – High Mountain Stony Loam (Engelmann Spruce)
F048AY524UT – High Mountain Stony Loam (Engelmann Spruce)
Surface textures are generally fine sandy loam to gravelly sandy loam with surface rock fragments less than 10%.
F048AY523UT – High Mountain Stony Loam (Douglas Fir)
F048AY523UT – High Mountain Stony Loam (Douglas Fir)
Soil epipedon is generally pachic (mollic and greater than 20” thick)
F048AY528UT – High Mountain Very Steep Loam (Aspen)
F048AY528UT – High Mountain Very Steep Loam (Aspen)
Surface soil texture is coarse (very stony or bouldery)
F048AY530UT – High Mountain Very Steep Loam (Douglas Fir)
F048AY530UT – High Mountain Very Steep Loam (Douglas Fir)
Surface soil texture is finer (loam to fine sandy loam)
Rock fragments on the soil surface are generally greater than 15%.
F048AY532UT – High Mountain Very Steep Stony Loam (Engelmann Spruce)
F048AY532UT – High Mountain Very Steep Stony Loam (Engelmann Spruce)
Rock fragments on the soil surface are generally less than 15%.
F048AY509UT – High Mountain Loam (Douglas-Fir)
F048AY509UT – High Mountain Loam (Douglas-Fir)
Generally restrictive layer 20” or less from the soil surface
Generally restrictive layer greater than 20” from the soil surface
Surface textures are mostly cobbly loam (rocks 3-10” 10-20% of by volume)
R048AY442UT – Mountain Shallow Loam (Salina Wildrye)
R048AY442UT – Mountain Shallow Loam (Salina Wildrye)
Surface textures are mostly channery loam with current or past evidence of trees occupying the site
R048AY443UT – Mountain Shallow Loam (Mixed Conifer)
R048AY443UT – Mountain Shallow Loam (Mixed Conifer)
Surface textures are mostly very gravelly loam (gravels 10-30% by volume)
R048AY433UT – Mountain Shallow Loam (Black Sagebrush)
R048AY433UT – Mountain Shallow Loam (Black Sagebrush)
Surface textures are mostly gravelly sandy loam with current or past evidence of trees occupying the site
F048AY439UT – Mountain Shallow Loam (Ponderosa pine)
F048AY439UT – Mountain Shallow Loam (Ponderosa pine)
Surface textures are loam with Gambel’s oak likely the dominant aspect of the site
R048AY430UT – Mountain Shallow Loam (Oak)
R048AY430UT – Mountain Shallow Loam (Oak)
Surface soil textures are predominately fine sandy loam, but have a gravel modifier as well
R048AY436UT – Mountain Shallow Loam (Mountain Big Sagebrush)
R048AY436UT – Mountain Shallow Loam (Mountain Big Sagebrush)
Top 24” of soil profile generally contains greater than 50% rock fragments by volume
Top 24” of soil profile generally contains less than 50% rock fragments by volume
Surface soil texture mainly extremely boulder fine sandy loam or very channery loam
R048AY478UT – Mountain Windswept Ridge
R048AY478UT – Mountain Windswept Ridge
Surface soil texture mainly channery/very channery loam with past or present evidence of tree occupying the site
F048AY452UT – Mountain Stony Loam (Douglas Fir)
F048AY452UT – Mountain Stony Loam (Douglas Fir)
Surface soil texture mainly loam to very fine sandy loam
R048AY448UT – Mountain Stony Loam (Mountain Big Sagebrush)
R048AY448UT – Mountain Stony Loam (Mountain Big Sagebrush)
Surface soil texture mainly very cobbly very fine sandy loam to stony loam with past or present evidence of trees occupying the site
F048AY457UT – Mountain Stony Loam (Ponderosa pine)
F048AY457UT – Mountain Stony Loam (Ponderosa pine)
Surface soil texture mainly sandy loam to gravelly sandy loam and does not have rock fragments greater than 3” on the soil surface
R048AY449UT – Mountain Stony Loam (Black sagebrush)
R048AY449UT – Mountain Stony Loam (Black sagebrush)
Surface soil texture mainly gravelly sandy loam to loam, has less than 10% rock fragments on the soils surface greater than 3”
R048AY451UT – Mountain Stony Loam (Shrub)
R048AY451UT – Mountain Stony Loam (Shrub)
Surface soil textures mainly extremely stony loam to extremely boulder fine sandy loam with slopes typically greater than 50% and past/present evidence of trees occupying the site
F048AY475UT – Mountain Very Steep Stony Loam (Douglas Fir)
F048AY475UT – Mountain Very Steep Stony Loam (Douglas Fir)
Surface soil textures mainly gravelly sandy loam with slopes generally greater than 50%
R048AY473UT – Mountain Very Steep Stony Loam (Shrub)
R048AY473UT – Mountain Very Steep Stony Loam (Shrub)
Slopes on site typically greater than 50%
Slopes on site typically less than 50%
Surface soil texture sandy loam with past/present evidence of trees occupying the site
F048AY463UT – Mountain Very Steep Loam (Douglas Fir)
F048AY463UT – Mountain Very Steep Loam (Douglas Fir)
Surface soil textures mainly stony/extremely stony loam, to very channery loam
R048AY466UT – Mountain Very Steep Loam (Salina Wildrye)
R048AY466UT – Mountain Very Steep Loam (Salina Wildrye)
Surface soil textures are mainly very channery loam and rock fragment on the soil surface is larger than 3”
R048AY471UT – Mountain Very Steep Loam (Curlleaf mountainmahogany)
R048AY471UT – Mountain Very Steep Loam (Curlleaf mountainmahogany)
Surface soil textures mainly fine sandy loam to loam with past/present evidence of Gambel’s oak on the site
R048AY465UT – Mountain Very Steep Loam (Oak)
R048AY465UT – Mountain Very Steep Loam (Oak)
Site occurs in area that receive additional moisture from adjacent upland sites
R048AY410UT – Mountain Loamy Bottom (Basin Wildrye)
R048AY410UT – Mountain Loamy Bottom (Basin Wildrye)
Site not as above
Present or past evidence that trees dominated this site
R048AY417UT – Mountain Loam (Ponderosa Pine)
R048AY417UT – Mountain Loam (Ponderosa Pine)
Surface soil texture mainly loam to stony loam with the past/present evidence of Gambel’s oak as the dominant aspect of the site
R048AY415UT – Mountain Loam (Oak)
R048AY415UT – Mountain Loam (Oak)
Surface soil texture mainly stony to clay loam with the dominant aspect of the site being a grass
R048AY409UT – Mountain Loam (Salina Wildrye)
R048AY409UT – Mountain Loam (Salina Wildrye)
Surface soil texture mainly gravelly fine sandy loam
R048AY406UT – Mountain Loam (Shrub)
R048AY406UT – Mountain Loam (Shrub)
Surface soil texture mainly loam, fine sandy loam to cobbly fine sandy loam
R048AY405UT – Mountain Loam (Mountain Big Sagebrush)
R048AY405UT – Mountain Loam (Mountain Big Sagebrush)
Generally restrictive layer 20” or less from the soil surface
Generally restrictive layer greater than 20” from the soil surface
Surface textures are mostly clay loam
R048AY315UT – Upland Clay Loam (Utah Juniper-Pinyon)
R048AY315UT – Upland Clay Loam (Utah Juniper-Pinyon)
Surface textures are mostly channery or gravelly sandy loam (surface fragments 10-30% by volume)
R048AY320UT – Upland Shallow Loam (Black sagebrush)
R048AY320UT – Upland Shallow Loam (Black sagebrush)
Surface textures are mostly very channery loam (surface fragments 10-30% by volume)
R048AY322UT – Upland Shallow Loam (Two-Needle Pinyon / Utah Juniper)
R048AY322UT – Upland Shallow Loam (Two-Needle Pinyon / Utah Juniper)
Surface textures are mostly very channery loam and rock content in the top 24" is greater than 35% by volume.
F048AY330UT – Upland Shallow Stony Loam (Two-Needle Pinyon /Douglas Fir)
F048AY330UT – Upland Shallow Stony Loam (Two-Needle Pinyon /Douglas Fir)
Surface soil textures are fine gravelly silty clay loam to gravelly loam and rock content is generally less than 35% of the soil volume
R048AY309UT – Upland Loam (Birchleaf Mountain Mahogany)
R048AY309UT – Upland Loam (Birchleaf Mountain Mahogany)
Surface soil textures are predominately gravelly loam on outwash terraces (surface fragments 10-30%).
R048AY323UT – Upland Shallow Hardpan (Black Sagebrush)
R048AY323UT – Upland Shallow Hardpan (Black Sagebrush)
Surface soil texture mainly very channery loam (surface fragments 20-70%) with slopes greater than 35%.
R048AY366UT – Upland Very Steep Loam (Salina Wildrye)
R048AY366UT – Upland Very Steep Loam (Salina Wildrye)
Surface textures are mostly gravelly fine sandy loam (surface fragments 10-40% by volume)
R048AY332UT – Upland Shallow Stony Loam (Bonneville Big Sagebrush)
R048AY332UT – Upland Shallow Stony Loam (Bonneville Big Sagebrush)
Surface textures are channery loam with slopes greater than 35%
R048AY342UT – Upland Very Steep Shallow Loam (Pinyon-Utah Juniper)
R048AY342UT – Upland Very Steep Shallow Loam (Pinyon-Utah Juniper)
Top 24” of soil profile generally contains greater than 35% rock fragments by volume
Top 24” of soil profile generally contains less than 35% rock fragments by volume
Surface soil texture mainly channery/extremely channery loam (surface fragments 10-60%).
R048AY331UT – Upland Stony Loam (Pinyon-Utah Juniper)
R048AY331UT – Upland Stony Loam (Pinyon-Utah Juniper)
Surface soil texture mainly channery or bouldery sandy loam (surface fragments greater than 35%).
R048AY334UT – Upland Stony Loam (basin big sagebrush-saline wildrye)
R048AY334UT – Upland Stony Loam (basin big sagebrush-saline wildrye)
Surface soil texture mainly channery fine sandy loam (surface fragments 10-30%).
R048AY311UT – Upland Gravelly Loam (Bonneville Big Sagebrush)
R048AY311UT – Upland Gravelly Loam (Bonneville Big Sagebrush)
Surface soil texture mainly loamy sand are excessively drained on alluvial fans
R048AY312UT – Upland Sand (Basin big sagebrush)
R048AY312UT – Upland Sand (Basin big sagebrush)
Surface soil texture mainly loam, may have a gravelly modifier, has less than 10% rock fragments on the soils surface
R048AY306UT – Upland Loam (Wyoming Big Sagebrush)
R048AY306UT – Upland Loam (Wyoming Big Sagebrush)
Surface soil texture mainly loam to silty clay loam, may have a gravelly modifier, has less than 10% rock fragments on the soils surface
R048AY308UT – Upland Loam (Bonneville Big Sagebrush)
R048AY308UT – Upland Loam (Bonneville Big Sagebrush)
Precipitation is 16-20 inches; site has no water table or receives run-in moisture; family particle size is fine-loamy; surface texture is loam, clay loam, sandy clay loam or gravelly loam
R048AY122WY – Mountain Loam
R048AY122WY – Mountain Loam
Site not as above
Precipitation 9-12 inches(ustic bordering on aridic moisture regime); frigid temperature regime; approximately 6,000-8,000 feet in elevation – Semidesert climate zone
Precipitation is 12-16 inches (aridic bordering on ustic moisture regime); frigid temperature regime; approximately 7,000 -8,500 feet in elevation - Dry Mountain/foothills/ climate zone (Note: This climate zone is called Upland in Utah sites.)
Precipitation 16-20 inches (typic ustic moisture regime); frigid or cryic temperature regime; approximately 7,000-9,000 feet in elevation – Mountains climate zone
Precipitation 20-40 inches (ustic udic and typic udic); cryic temperature regime; below tree-line; approximately 8,000 – 10,000 feet in elevation - Subalpine Climate zone
Precipitation is 30-50 inches (Typic Udic); cryic temperature regime; above tree-line; approximately 10,000-14,440 feet in elevation - Alpine Climate Zone
No water table or run-in moisture; soil depth is 20-40 inches; family particle size is fine-loamy; soil surface is sandy loam
R048AY270CO – Valley Bench
R048AY270CO – Valley Bench
Site not as above - Not Applicable
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
Site receives no extra water beyond normal precipitation
Site has water table 12-72 inches in depth; soil depth is greater than 60 inches; family particle size is fine loamy; soil surface texture is loam
R048AY243CO – Swale Meadow
R048AY243CO – Swale Meadow
Site is not as above
Site in landscape position and receives run-in water, no water table in 6 feet; family particle size is fine-loamy; soil surface texture is loam, sandy loam, clay loam or gravelly sandy clay loam
R048AY285CO – Foothill Swale
R048AY285CO – Foothill Swale
Site not as above - Not Applicable
Site has bedrock within 20 inches of the soil surface (shallow soil)
Site not as above, site is greater than 20 inches to bedrock
Site is located in the Gunnison Basin
Site not as above
Parent material is granite, gneiss, family particle size is loamy; soil surface texture is very gravely loam, very gravelly sandy loam or gravelly loam
R048AA235CO – Dry Exposure Gunnison Basin LRU
R048AA235CO – Dry Exposure Gunnison Basin LRU
Site not as above - Not Applicable
Family particle size is clayey
Site not as above
Parent material sandstone and/or shale; surface texture is channery loam, very channery loam, flaggy clay loam, channery silty clay loam, sandy loam, or gravelly coarse sandy loam
R048AY235CO – Dry Exposure
R048AY235CO – Dry Exposure
Site not as above - Not Applicable
Family particle size is loamy-skeletal
Site not as above
Parent material sandstone, and/or siltstone; surface texture is loam, sandy loam, channery loam, or very gravelly loam
F048AY448CO – Mountain Pinyon
F048AY448CO – Mountain Pinyon
Parent material sandstone and/or shale; surface texture is channery loam, very channery loam, flaggy clay loam, channery silty clay loam, sandy loam, or gravelly coarse sandy loam
R048AY235CO – Dry Exposure
R048AY235CO – Dry Exposure
Site not as above - Not Applicable
Family particle size is loamy
Site not as above - Not Applicable
Parent material sandstone, and/or siltstone; surface texture is loam, sandy loam, channery loam, or very gravelly loam
F048AY448CO – Mountain Pinyon
F048AY448CO – Mountain Pinyon
Parent material sandstone and/or shale; surface texture is channery loam, very channery loam, flaggy clay loam, channery silty clay loam, sandy loam, or gravelly coarse sandy loam
R048AY235CO – Dry Exposure
R048AY235CO – Dry Exposure
Parent material limestone or sandstone; surface texture is sandy loam or gravelly sandy loam
R048AY307CO – Shallow Slopes
R048AY307CO – Shallow Slopes
Site not as above - Not Applicable
Soils are skeletal soils (greater than 35% rock fragments)
Site not as above, soils are non-skeletal (less than 35% rock fragments
Family particle size is loamy-skeletal
Site is not loamy-skeletal family particle size
Site occurs as long narrow belts on fan terraces, alluvial fans and glacial outwash plains adjacent to the Arkansas River
Site not as above
Parent material is outwash and alluvium; surface texture is stony sandy loam or very gravelly loamy sand
R048AY282CO – Boulder Flats
R048AY282CO – Boulder Flats
Site not as above - Not Applicable
Parent material is basalt, sandstone, and/or shale; soil surface is stony sandy loam, gravelly sandy loam, very cobbly loam, or very stony sandy loam; slope is 3-30%
R048AY287CO – Stony Foothills
R048AY287CO – Stony Foothills
Parent material shale, sandstone, and/or basalt, surface texture is cobbly sandy loam, cobbly loam, very flaggy loam or channery loam; slope is 25-65%
R048AY303CO – Loamy Slopes
R048AY303CO – Loamy Slopes
Site not as above - Not Applicable
Family particle size is sandy-skeletal, soil surface texture is generally a gravelly sandy loam; site occurs on fan terraces and alluvial fans
R048AY316CO – Dry Mountain Outwash
R048AY316CO – Dry Mountain Outwash
Site not as above - Not Applicable
Family particle size is fine
Site not as above
Parent material is sandstone and shale; surface texture is a loam
R048AY244CO – Mountain Shale
R048AY244CO – Mountain Shale
Site not as above - Not Applicable
Family particle size is coarse-loamy.
Site not as above
Parent material is alluvium; surface textures is sandy loam, gravelly sandy loam, or gravelly loam
R048AY272CO – Sandy Bench
R048AY272CO – Sandy Bench
Site not as above - Not Applicable
Family particle size is fine-loamy
Site not as above - Not Applicable
Located in the Gunnison Basin
Site not as above
Parent material is rhyolite, sedimentary rock, or granite; soil surface textures is gravelly sandy loam or fine sandy loam
R048AA231CO – Dry Mountain Loam Gunnison Basin LRU
R048AA231CO – Dry Mountain Loam Gunnison Basin LRU
Site not as above - Not Applicable
Parent material is sedimentary rock, basalt or sandstone; soil surface texture is loam
R048AY231CO – Dry Mountain Loam
R048AY231CO – Dry Mountain Loam
Parent material is sandstone and shale, or basalt; soil surface texture is loam, very channery loam, or sandy clay loam
R048AY292CO – Deep Loam
R048AY292CO – Deep Loam
Parent material is sandstone and shale; soil surface texture is loam
R048AY242CO – Dry Mountain Shale
R048AY242CO – Dry Mountain Shale
Site is located in the Wescliffe area, parent material is alluvium, colluvium and eolian materials; soil surface is sandy loam or gravelly sandy loam
R048AY226CO – Mountain Loam 13-18 PZ Westcliffe Area
R048AY226CO – Mountain Loam 13-18 PZ Westcliffe Area
Site not as above - Not Applicable
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
Site receives no extra water beyond normal precipitation
Site has perennial water table 0-24 inches in depth; soil depth is greater 40 inches; family particle size is fine-loamy or fine
Site not as above
Site located in the Gunnison Basin
R048AA241CO – Mountain Meadow Gunnison Basin LRU
R048AA241CO – Mountain Meadow Gunnison Basin LRU
Site not as above
R048AY241CO – Mountain Meadow
R048AY241CO – Mountain Meadow
Site located in the Gunnison Basin
Site not as above
Water table 60 inches or greater in depth and seasonally in early spring; family particle size is fine-loamy
R048AA245CO – Mountain Swale Gunnison Basin LRU
R048AA245CO – Mountain Swale Gunnison Basin LRU
Site not as above - Not Applicable
Site in landscape position that receives run-in water; 60 inches or greater in depth; no water table present in 6 feet; family particle size – fine-loamy
R048AY245CO – Mountain Swale
R048AY245CO – Mountain Swale
Site not as above - Not Applicable
Site has bedrock within 20 inches of the soil surface (shallow soil)
Site not as above, site is greater than 20 inches to bedrock
Family particle size is loamy
Site not as above
Parent material is tachylyte, volcanic breccia, igneous rock, tuff, granite, gneiss and/or sandstone; surface soil textures isgravelly sandy loam, channery loam, or fine sandy loam
R048AY230CO – Shallow Loam
R048AY230CO – Shallow Loam
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam
R048AY255CO – Pine Grasslands
R048AY255CO – Pine Grasslands
Site not as above - Not Applicable
Site is loamy-skeletal
Site not as above - Not Applicable
Parent material is granite, gneiss, phyllite, schist, sandstone and/or limestone; Soil surface texture is gravelly sandy loam, channery loam or fine sandy loam
R048AY229CO – Rocky Loam
R048AY229CO – Rocky Loam
Parent material is tachylyte, volcanic breccia, igneous rock, tuff, granite, gneiss and/or sandstone; surface soil textures isgravelly sandy loam, channery loam, or fine sandy loam
R048AY230CO – Shallow Loam
R048AY230CO – Shallow Loam
Parent material is monzonite, granite, gneiss and/or granodiorite; surface soil textures is very gravelly sandy loam
R048AY218CO – Dry Shallow Pine
R048AY218CO – Dry Shallow Pine
Parent material is volcanic breccia, granite, gneiss, sandstone, and/or granodiorite; surface soil textures is very gravelly sandy loam, gravelly sandy loam, or very gravelly loam
R048AY240CO – Shallow Pine
R048AY240CO – Shallow Pine
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam
R048AY255CO – Pine Grasslands
R048AY255CO – Pine Grasslands
Site not as above - Not Applicable
Soils are skeletal soils (greater than 35% rock fragments)
Site not as above, soils are non-skeletal (less than 35% rock fragments
Family particle size is sandy-skeletal
Site not as above
Parent material is alluvium and outwash; surface texture is gravelly sandy loam or stony sandy loam
R048AY311CO – Mountain Outwash
R048AY311CO – Mountain Outwash
Site not as above - Not Applicable
Family particle size is clayey-skeletal
Site not as above
Parent material is sandstone and/or shale; surface texture is loam or clay loam
R048AY238CO – Brushy Loam
R048AY238CO – Brushy Loam
Parent material is igneous, metamorphic and sedimentary rock; surface texture is very gravelly sandy clay loam, very stony loam or gravelly loam
R048AY239CO – Brushy Mountain Loam
R048AY239CO – Brushy Mountain Loam
Soils are > 40” in depth; surface texture very gravelly, gravelly or very cobbly loam or very sandy loam.
R048AY377CO – Skeletal Loam
R048AY377CO – Skeletal Loam
Family particle size is loamy-skeletal
Site not as above - Not Applicable
Parent material is basalt, sandstone, till, outwash, schist, granite, gneiss, igneous and/or metamorphic rock; soil surface texture is stony loam, extremely stony loam, cobbly loam, very stony loam, cobbly sandy loam or very cobbly sandy loam
R048AY237CO – Stony Loam
R048AY237CO – Stony Loam
Parent material is sandstone and/or shale; surface texture is loam or clay loam
R048AY238CO – Brushy Loam
R048AY238CO – Brushy Loam
Parent material is igneous, metamorphic and sedimentary rock; surface texture is very gravelly sandy clay loam, very stony loam or gravelly loam
R048AY239CO – Brushy Mountain Loam
R048AY239CO – Brushy Mountain Loam
Site not as above - Not Applicable
Family particle size is fine-silty
Site not as above
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam
R048AY255CO – Pine Grasslands
R048AY255CO – Pine Grasslands
Site not as above - Not Applicable
Family particle size is fine-loamy
Site not as above
Located in the Gunnison Basin
Site not as above
Parent material is rhyolite, granite volcanic rock, sedimentary rock, igneous and/or metamorphic rock; surface texture is loam or gravelly sandy loam
R048AA228CO – Mountain Loam Gunnison Basin LRU
R048AA228CO – Mountain Loam Gunnison Basin LRU
Site not as above - Not Applicable
Parent material is sandstone, shale, igneous rock, metamorphic rock, schist, and/or granite. Surface texture is loam, sandy loam, gravelly sandy loam or silt loam; 0-30% slope
R048AY228CO – Mountain Loam
R048AY228CO – Mountain Loam
Parent material is granite, gneiss, schist, sandstone, shale, igneous rock and/or metamorphic rock, surface texture is loam or sandy loam, slope 0-30%
R048AY222CO – Loamy Park
R048AY222CO – Loamy Park
Parent material is igneous, metamorphic and/or sedimentary rock; surface texture is very gravelly sandy clay loam, very stony loam or gravelly loam; 3-50% slope
R048AY239CO – Brushy Mountain Loam
R048AY239CO – Brushy Mountain Loam
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam; 0-30% slope
R048AY255CO – Pine Grasslands
R048AY255CO – Pine Grasslands
Parent material is sandstone; surface texture is cobbly fine sandy loam; slope is 25-75%
R048AY379CO – Brushy Slopes
R048AY379CO – Brushy Slopes
Site not as above - Not Applicable
Family particle size is fine
Site not as above - Not Applicable
Located on the western slope in Colorado around the Grand Mesa to the North/West part of the San Juan Mountains and the Gunnison Basin (Shale Highlands LRU); parent material is Mancos/ Wasatch shale and/or siltstone; surface texture is clay loam, silty clay loam or loam
R048AA247CO – Deep Clay Loam Shale Highlands LRU
R048AA247CO – Deep Clay Loam Shale Highlands LRU
Not located in Shale Highland LRU (Grand Mesa to the North/West part of the San Juan Mountains and the Gunnison Basin); Parent material is shale, igneous rock, metamorphic rock and/or sedimentary rock, surface texture is clay loam, loam, or silt loam
R048AY247CO – Deep Clay Loam
R048AY247CO – Deep Clay Loam
Parent material sandstone and/or shale. Surface texture is loam, clay loam, very stony loam, cobbly loam, sandy loam, cobbly sandy loam, very bouldery sandy loam, or fine sandy loam
F048AY925CO – Ponderosa Pine Forest
F048AY925CO – Ponderosa Pine Forest
Parent material sandstone and shale; surface texture is loam, clay loam, or very cobbly loam
R048AY234CO – Mountain Clay
R048AY234CO – Mountain Clay
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam
R048AY255CO – Pine Grasslands
R048AY255CO – Pine Grasslands
Parent material is shale, sandstone and/or siltstone; surface texture is clay loam, loam, gravelly loam, or silty clay loam
R048AY248CO – Mountain Clay Loam
R048AY248CO – Mountain Clay Loam
Parent material is shale and/or sandstone; surface textures is clay loam or loam
R048AY257CO – Clayey Valley
R048AY257CO – Clayey Valley
Site not as above - Not Applicable
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
Site receives no extra water beyond normal precipitation
Site occurs on the Grand Mesa; precipitation is 37-45 inches; Site in landscape position and receives run-in water; 20 inches or greater in depth; no water table present in 6 feet; family particle size is fine-loamy, clayey-skeletal or loamy-skeletal; soil surface texture is loam or gravelly loam
R048AY253CO – Wet Subalpine
R048AY253CO – Wet Subalpine
Site not as above - Not Applicable
Site has bedrock within 20 inches of the soil surface
Not as above, site is greater than 20 inches in depth to bedrock
Family particle size is loamy
Site not as above
Precipitation is 20-30 inches; Parent material is sandstone, shale; basalt, andesite, tuff breccia and/or rhyolite; surface texture – loam, channery loam, sandy loam, extremely stony loam, gravelly silt loam or gravelly loam
R048AY251CO – Shallow Subalpine
R048AY251CO – Shallow Subalpine
Site not as above - Not Applicable
Family particle size is clayey-skeletal
Site not as above
Precipitation is 20-30 inches; parent material is shale and/or sandstone; surface texture is very gravelly loam, fine sandy loam or cobbly fine sandy loam
F048AY912CO – Lodgepole Pine
F048AY912CO – Lodgepole Pine
Site not as above - Not Applicable
Family particle size is loamy-skeletal
Site not as above - Not Applicable
Precipitation is 20-30 inches; Parent material is sandstone, shale; basalt, andesite, tuff breccia and/or rhyolite; surface texture – loam, channery loam, sandy loam, extremely stony loam, gravelly silt loam or gravelly loam
R048AY251CO – Shallow Subalpine
R048AY251CO – Shallow Subalpine
Precipitation is 20-30 inches; parent material is shale and/or sandstone; surface texture is very gravelly loam, fine sandy loam or cobbly fine sandy loam
F048AY912CO – Lodgepole Pine
F048AY912CO – Lodgepole Pine
Site not as above - Not Applicable
Rock fragments greater than 35%
Site is not as above, rock fragments less than 35%
Family particle size is clayey-skeletal
Site not as above
Precipitation is 20-30 inches; parent material is shale and/or sandstone; surface texture is very gravelly loam, fine sandy loam or cobbly fine sandy loam
F048AY912CO – Lodgepole Pine
F048AY912CO – Lodgepole Pine
Precipitation is 20-30 inches; parent material is igneous, metamorphic rock, sedimentary rock; sandstone and shale, diorite and or rhyolite; surface texture is loam, stony loam, very stony loam, cobbly loam, gravelly loam or very cobbly loam
F048AY449CO – Aspen Woodland
F048AY449CO – Aspen Woodland
Precipitation is 20-40 inches; parent material is igneous rock, metamorphic rock, sedimentary rock, sandstone and shale and/or volcanic breccia; surface texture is very cobbly sandy loam, very gravelly sandy loam very stony sandy loam, very cobbly fine sandy loam, stony fine sandy loam, loam, cobbly loam or gravelly loam
F048AY918CO – Spruce-Fir Woodland
F048AY918CO – Spruce-Fir Woodland
Site not as above - Not Applicable
Family particle size is Loamy-skeletal
Site not as above - Not Applicable
Precipitation is 20 to 25 inches; parent material is sandstone and shale, andesite, or sedimentary rock; surface texture is very stony loam, loam, clay loam, stony sandy clay loam, or very stony sandy loam
F048AY924CO – Douglas Fir/Gambel Oak
F048AY924CO – Douglas Fir/Gambel Oak
Precipitation is 20-30 inches; parent material is igneous, metamorphic rock, sedimentary rock; sandstone and shale, diorite and or rhyolite; surface texture is loam, stony loam, very stony loam, cobbly loam, gravelly loam or very cobbly loam
F048AY449CO – Aspen Woodland
F048AY449CO – Aspen Woodland
Precipitation is 20-30 inches; parent material is shale and/or sandstone; surface texture is very gravelly loam, fine sandy loam or cobbly fine sandy loam
F048AY912CO – Lodgepole Pine
F048AY912CO – Lodgepole Pine
Precipitation is 20-40 inches; parent material is granite, sandstone and shale, volcanic rock, gneiss, mica schist, or sandstone; surface textures is loam, very gravelly sandy loam, very stony sandy loam, stony sandy loam, stony loam, very stony loam, very cobbly loam, or gravelly fine sandy loam
F048AY908CO – Mixed Conifer
F048AY908CO – Mixed Conifer
Precipitation is 20-40 inches; parent material is volcanic breccia; surface texture is cobbly ashy loam, cobbly ashy silt loam or cobbly loam
F048AY915CO – Engelmann Spruce – Whortleberry– Jacob's-Ladder
F048AY915CO – Engelmann Spruce – Whortleberry– Jacob's-Ladder
Precipitation is 20-40 inches; parent material is volcanic breccia or sandstone; surface textures is stony loam, stony ashy loam, or cobbly ashy loam
F048AY917CO – Abies lasiocarpa/Paxistima myrsinites/Erigeron eximius
F048AY917CO – Abies lasiocarpa/Paxistima myrsinites/Erigeron eximius
Precipitation is 20-40 inches; parent material is volcanic breccia; surface textures is very stony ashy loam
F048AY919CO – Subalpine Fir/Blueberry/Twinflower
F048AY919CO – Subalpine Fir/Blueberry/Twinflower
Precipitation is 20-40 inches; parent material is volcanic breccia or tuff; surface textures is stony ashy loam or cobbly loam
F048AY921CO – White Fir/Snowberry
F048AY921CO – White Fir/Snowberry
Precipitation is 20-40 inches; parent material is igneous rock, metamorphic rock, sedimentary rock, sandstone and shale and/or volcanic breccia; surface texture is very cobbly sandy loam, very gravelly sandy loam very stony sandy loam, very cobbly fine sandy loam, stony fine sandy loam, loam, cobbly loam or gravelly loam
F048AY918CO – Spruce-Fir Woodland
F048AY918CO – Spruce-Fir Woodland
Site not as above - Not applicable
Family particle size is fine
Site not as above
Precipitation is 20-30 inches; parent material is igneous, metamorphic rock, sedimentary rock; sandstone and shale, diorite and or rhyolite; surface texture is loam, stony loam, very stony loam, cobbly loam, gravelly loam or very cobbly loam
F048AY449CO – Aspen Woodland
F048AY449CO – Aspen Woodland
Precipitation is 20-30 inches; parent material is sandstone and shale; or igneous, metamorphic and sedimentary rock; surface texture is loam, clay loam or silt loam
R048AY252CO – Subalpine Clay
R048AY252CO – Subalpine Clay
Site not as above - Not Applicable
Family particle size is fine-loamy
Site not as above - Not Applicable
Precipitation is 20 to 25 inches; parent material is sandstone and shale, andesite, or sedimentary rock; surface texture is very stony loam, loam, clay loam, stony sandy clay loam, or very stony sandy loam
F048AY924CO – Douglas Fir/Gambel Oak
F048AY924CO – Douglas Fir/Gambel Oak
Located in Gunnison Basin; precipitation is 20-30 inches; parent materials andesite, rhyolite or sandstone and shale; surface texture is loam
R048AA250CO – Subalpine Loam Gunnison Basin LRU
R048AA250CO – Subalpine Loam Gunnison Basin LRU
Site not in the Gunnison Basin; parent material is sandstone, shale, volcanic rock, or igneous, metamorphic and sedimentary rock; surface texture is loam
R048AY250CO – Subalpine Loam
R048AY250CO – Subalpine Loam
Precipitation is 20-30 inches; parent material is igneous, metamorphic rock, sedimentary rock; sandstone and shale, diorite and or rhyolite; surface texture is loam, stony loam, very stony loam, cobbly loam, gravelly loam or very cobbly loam
F048AY449CO – Aspen Woodland
F048AY449CO – Aspen Woodland
Precipitation is 20-40 inches; parent material is granite, sandstone and shale, volcanic rock, gneiss, mica schist, or sandstone; surface textures is loam, very gravelly sandy loam, very stony sandy loam, stony sandy loam, stony loam, very stony loam, very cobbly loam, or gravelly fine sandy loam
F048AY908CO – Mixed Conifer
F048AY908CO – Mixed Conifer
Precipitation is 20-40 inches; parent material is igneous rock, metamorphic rock, sedimentary rock, sandstone and shale and/or volcanic breccia; surface texture is very cobbly sandy loam, very gravelly sandy loam very stony sandy loam, very cobbly fine sandy loam, stony fine sandy loam, loam, cobbly loam or gravelly loam
F048AY918CO – Spruce-Fir Woodland
F048AY918CO – Spruce-Fir Woodland
Site not as above - Not applicable
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
Site receives no extra water beyond normal precipitation
Site has perennial water table 0-12 inches in depth; soil depth is greater than 60 inches; soil surface texture is loam, cobbly loam or silt loam
R048AY305CO – Alpine Meadow
R048AY305CO – Alpine Meadow
Site not as above
Site occurs on the Grand Mesa; precipitation is 37-45 inches; Site in landscape position and receives run-in water; 20 inches or greater in depth; no water table present in 6 feet; family particle size is fine-loamy, clayey-skeletal or loamy-skeletal; soil surface texture is loam or gravelly loam
R048AY253CO – Wet Subalpine
R048AY253CO – Wet Subalpine
Site not as above - Not Applicable
Site have bedrock within 20 inches of the soil surface
Not as above, Site is greater than 20 inches in depth to bedrock
Family particle size is loamy or loamy-skeletal; Surface texture is very gravelly loam, very stony loam, very cobbly loam, very stony sandy loam, very cobbly sandy loam, loam or very cobbly silt loam
R048AY308CO – Shallow Alpine
R048AY308CO – Shallow Alpine
Site not as above - Not Applicable
Rock fragments greater than 35% and family particle size is loamy-skeletal
Site not as above - Not applicable
0-30% slopes
Slopes is 30-60%
Parent material is colluvium, till, basalt, rhyolite, tuff, volcanic breccia, and/or andesite; soil surface texture is very gravelly loam, cobbly loam, stony loam, or gravelly silt loam
R048AY306CO – Shrubby Alpine
R048AY306CO – Shrubby Alpine
Parent material rhyolite, tuff, volcanic rock and/or sandstone; soil surface texture is very gravelly loam, loam, or very stony sandy loam; 10-60% slopes
R048AY309CO – Warm Alpine
R048AY309CO – Warm Alpine
Site not as above - Not applicable
Parent material rhyolite, tuff, volcanic rock and/or sandstone; soil surface texture is very gravelly loam, loam, or very stony sandy loam; 10-60% slopes
R048AY309CO – Warm Alpine
R048AY309CO – Warm Alpine
Parent material is monzonite, diorite, conglomerate, rhyolite, volcanic rock sandstone, granite, gneiss, schist, andesite, tuffigneous rock and/or metamorphic rock; Surface texture is very gravelly loam, gravelly loam, extremely gravelly loam, very cobbly loam, extremely cobbly loam, very stony loam, or extremely stony sandy loam; 30-60% slopes
R048AY304CO – Alpine Slopes
R048AY304CO – Alpine Slopes
Site not as above - Not applicable
Long term average mean annual precipitation
- No filter
- 25 – 30cm (10 – 12in)
- 30 – 35cm (12 – 14in)
- 35 – 40cm (14 – 16in)
- 40 – 50cm (16 – 20in)
- 50 – 60cm (20 – 24in)
- 60 – 80cm (24 – 31in)
- 80 – 100cm (31 – 39in)
- 100 – 120cm (39 – 47in)
—
cm
Long term average frost free days
- No filter
- 0 – 30days
- 30 – 50days
- 50 – 70days
- 70 – 90days
- 90 – 110days
- 110 – 130days
- 130 – 150days
—
days
- No filter
- 1400 – 1600m (4600 – 5200ft)
- 1600 – 1800m (5200 – 5900ft)
- 1800 – 2000m (5900 – 6600ft)
- 2000 – 2200m (6600 – 7200ft)
- 2200 – 2400m (7200 – 7900ft)
- 2400 – 2600m (7900 – 8500ft)
- 2600 – 2800m (8500 – 9800ft)
- 2800 – 3000m (9800 – 26240ft)
- 3000 – 8000m
—
m
- No filter
- 0 – 3%
- 3 – 5%
- 5 – 10%
- 10 – 15%
- 15 – 20%
- 20 – 25%
- 25 – 30%
- 30 – 35%
- 35 – 40%
- 40 – 45%
- 45 – 50%
- 50 – 60%
- 60 – 70%
- 70 – 80%
- 80 – 90%
—
%
- No filter
- Alluvial fan
- Basin floor
- Bench
- Canyon
- Canyon bench
- Canyon wall
- Cirque
- Cirque floor
- Complex landslide
- Cuesta
- Depression
- Dip slope
- Drainageway
- Draw
- Ephemeral stream
- Escarpment
- Fan
- Fan remnant
- Fan terrace
- Flood plain
- Flood-plain step
- Hill
- Hillside
- Hillside or mountainside
- Hillslope
- Knob
- Landslide
- Mesa
- Moraine
- Mountain
- Mountain slope
- Mountain valley
- Mountainside
- Outwash fan
- Outwash plain
- Outwash terrace
- Peak
- Pediment
- Plain
- Plateau
- Ridge
- Scarp slope
- Stream
- Stream terrace
- Structural bench
- Swale
- Terrace
- Valley
- Valley floor
- Valley side
- No filter
- Andesite
- Basalt
- Breccia, non-volcanic
- Conglomerate, unspecified
- Diorite
- Gneiss
- Granite
- Granite and gneiss
- Granodiorite
- Igneous and metamorphic
- Igneous and sedimentary
- Igneous, metamorphic and sedimentary
- Igneous, unspecified
- Latite
- Limestone and sandstone
- Limestone and shale
- Limestone, sandstone and shale
- Limestone, unspecified
- Metamorphic and sedimentary
- Metamorphic, unspecified
- Monzonite
- Mudstone
- Phyllite
- Quartzite
- Rhyolite
- Sandstone and shale
- Sandstone and siltstone
- Sandstone, calcareous
- Sandstone, unspecified
- Schist, mica
- Schist, unspecified
- Sedimentary, unspecified
- Shale and siltstone
- Shale, calcareous
- Shale, clayey
- Shale, unspecified
- Tachylite
- Trachyte
- Tuff breccia
- Tuff, unspecified
- Volcanic and metamorphic
- Volcanic and sedimentary
- Volcanic breccia, unspecified
- Volcanic, unspecified
- No filter
- Alluvium
- Ash flow (pyroclastic)
- Colluvium
- Complex landslide deposits
- Debris spread deposits
- Eolian deposits
- Organic, unspecified
- Outwash
- Residuum
- Slide deposits
- Slope alluvium
- Till, unspecified
Soil surface texture
- No filter
- Clay
- Clay loam
- Coarse sandy loam
- Fine sandy loam
- Loam
- Loamy sand
- Sandy clay loam
- Silty clay
- Silty clay loam
- Silt loam
- Sandy loam
- Very fine sandy loam
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Ecological site keys
MLRA 48A Colorado
I.
Precipitation 9-12 inches(ustic bordering on aridic moisture regime); frigid temperature regime; approximately 6,000-8,000 feet in elevation – Semidesert climate zone
A.
No water table or run-in moisture; soil depth is 20-40 inches; family particle size is fine-loamy; soil surface is sandy loam
... R048AY270CO – Valley Bench
B.
Site not as above - Not Applicable
II.
Precipitation is 12-16 inches (aridic bordering on ustic moisture regime); frigid temperature regime; approximately 7,000 -8,500 feet in elevation - Dry Mountain/foothills/ climate zone (Note: This climate zone is called Upland in Utah sites.)
A.
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
1
Site has water table 12-72 inches in depth; soil depth is greater than 60 inches; family particle size is fine loamy; soil surface texture is loam
... R048AY243CO – Swale Meadow
2
Site is not as above
i.
Site in landscape position and receives run-in water, no water table in 6 feet; family particle size is fine-loamy; soil surface texture is loam, sandy loam, clay loam or gravelly sandy clay loam
... R048AY285CO – Foothill Swale
ii.
Site not as above - Not Applicable
B.
Site receives no extra water beyond normal precipitation
1
Site has bedrock within 20 inches of the soil surface (shallow soil)
i.
Site is located in the Gunnison Basin
a.
Parent material is granite, gneiss, family particle size is loamy; soil surface texture is very gravely loam, very gravelly sandy loam or gravelly loam
... R048AA235CO – Dry Exposure Gunnison Basin LRU
b.
Site not as above - Not Applicable
ii.
Site not as above
a.
Family particle size is clayey
1)
Parent material sandstone and/or shale; surface texture is channery loam, very channery loam, flaggy clay loam, channery silty clay loam, sandy loam, or gravelly coarse sandy loam
... R048AY235CO – Dry Exposure
2)
Site not as above - Not Applicable
b.
Site not as above
1)
Family particle size is loamy-skeletal
a)
Parent material sandstone, and/or siltstone; surface texture is loam, sandy loam, channery loam, or very gravelly loam
... F048AY448CO – Mountain Pinyon
b)
Parent material sandstone and/or shale; surface texture is channery loam, very channery loam, flaggy clay loam, channery silty clay loam, sandy loam, or gravelly coarse sandy loam
... R048AY235CO – Dry Exposure
c)
Site not as above - Not Applicable
2)
Site not as above
a)
Family particle size is loamy
(1)
Parent material sandstone, and/or siltstone; surface texture is loam, sandy loam, channery loam, or very gravelly loam
... F048AY448CO – Mountain Pinyon
(2)
Parent material sandstone and/or shale; surface texture is channery loam, very channery loam, flaggy clay loam, channery silty clay loam, sandy loam, or gravelly coarse sandy loam
... R048AY235CO – Dry Exposure
(3)
Parent material limestone or sandstone; surface texture is sandy loam or gravelly sandy loam
... R048AY307CO – Shallow Slopes
(4)
Site not as above - Not Applicable
b)
Site not as above - Not Applicable
2
Site not as above, site is greater than 20 inches to bedrock
i.
Soils are skeletal soils (greater than 35% rock fragments)
a.
Family particle size is loamy-skeletal
1)
Site occurs as long narrow belts on fan terraces, alluvial fans and glacial outwash plains adjacent to the Arkansas River
a)
Parent material is outwash and alluvium; surface texture is stony sandy loam or very gravelly loamy sand
... R048AY282CO – Boulder Flats
b)
Site not as above - Not Applicable
2)
Site not as above
a)
Parent material is basalt, sandstone, and/or shale; soil surface is stony sandy loam, gravelly sandy loam, very cobbly loam, or very stony sandy loam; slope is 3-30%
... R048AY287CO – Stony Foothills
b)
Parent material shale, sandstone, and/or basalt, surface texture is cobbly sandy loam, cobbly loam, very flaggy loam or channery loam; slope is 25-65%
... R048AY303CO – Loamy Slopes
c)
Site not as above - Not Applicable
b.
Site is not loamy-skeletal family particle size
1)
Family particle size is sandy-skeletal, soil surface texture is generally a gravelly sandy loam; site occurs on fan terraces and alluvial fans
... R048AY316CO – Dry Mountain Outwash
2)
Site not as above - Not Applicable
ii.
Site not as above, soils are non-skeletal (less than 35% rock fragments
a.
Family particle size is fine
1)
Parent material is sandstone and shale; surface texture is a loam
... R048AY244CO – Mountain Shale
2)
Site not as above - Not Applicable
b.
Site not as above
1)
Family particle size is coarse-loamy.
a)
Parent material is alluvium; surface textures is sandy loam, gravelly sandy loam, or gravelly loam
... R048AY272CO – Sandy Bench
b)
Site not as above - Not Applicable
2)
Site not as above
a)
Family particle size is fine-loamy
(1)
Located in the Gunnison Basin
(a)
Parent material is rhyolite, sedimentary rock, or granite; soil surface textures is gravelly sandy loam or fine sandy loam
... R048AA231CO – Dry Mountain Loam Gunnison Basin LRU
(b)
Site not as above - Not Applicable
(2)
Site not as above
(a)
Parent material is sedimentary rock, basalt or sandstone; soil surface texture is loam
... R048AY231CO – Dry Mountain Loam
(b)
Parent material is sandstone and shale, or basalt; soil surface texture is loam, very channery loam, or sandy clay loam
... R048AY292CO – Deep Loam
(c)
Parent material is sandstone and shale; soil surface texture is loam
... R048AY242CO – Dry Mountain Shale
(d)
Site is located in the Wescliffe area, parent material is alluvium, colluvium and eolian materials; soil surface is sandy loam or gravelly sandy loam
... R048AY226CO – Mountain Loam 13-18 PZ Westcliffe Area
(e)
Site not as above - Not Applicable
b)
Site not as above - Not Applicable
III.
Precipitation 16-20 inches (typic ustic moisture regime); frigid or cryic temperature regime; approximately 7,000-9,000 feet in elevation – Mountains climate zone
A.
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
1
Site has perennial water table 0-24 inches in depth; soil depth is greater 40 inches; family particle size is fine-loamy or fine
2
Site not as above
i.
Site located in the Gunnison Basin
a.
Water table 60 inches or greater in depth and seasonally in early spring; family particle size is fine-loamy
... R048AA245CO – Mountain Swale Gunnison Basin LRU
b.
Site not as above - Not Applicable
ii.
Site not as above
a.
Site in landscape position that receives run-in water; 60 inches or greater in depth; no water table present in 6 feet; family particle size – fine-loamy
... R048AY245CO – Mountain Swale
b.
Site not as above - Not Applicable
B.
Site receives no extra water beyond normal precipitation
1
Site has bedrock within 20 inches of the soil surface (shallow soil)
i.
Family particle size is loamy
a.
Parent material is tachylyte, volcanic breccia, igneous rock, tuff, granite, gneiss and/or sandstone; surface soil textures isgravelly sandy loam, channery loam, or fine sandy loam
... R048AY230CO – Shallow Loam
b.
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam
... R048AY255CO – Pine Grasslands
c.
Site not as above - Not Applicable
ii.
Site not as above
a.
Site is loamy-skeletal
1)
Parent material is granite, gneiss, phyllite, schist, sandstone and/or limestone; Soil surface texture is gravelly sandy loam, channery loam or fine sandy loam
... R048AY229CO – Rocky Loam
2)
Parent material is tachylyte, volcanic breccia, igneous rock, tuff, granite, gneiss and/or sandstone; surface soil textures isgravelly sandy loam, channery loam, or fine sandy loam
... R048AY230CO – Shallow Loam
3)
Parent material is monzonite, granite, gneiss and/or granodiorite; surface soil textures is very gravelly sandy loam
... R048AY218CO – Dry Shallow Pine
4)
Parent material is volcanic breccia, granite, gneiss, sandstone, and/or granodiorite; surface soil textures is very gravelly sandy loam, gravelly sandy loam, or very gravelly loam
... R048AY240CO – Shallow Pine
5)
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam
... R048AY255CO – Pine Grasslands
6)
Site not as above - Not Applicable
b.
Site not as above - Not Applicable
2
Site not as above, site is greater than 20 inches to bedrock
i.
Soils are skeletal soils (greater than 35% rock fragments)
a.
Family particle size is sandy-skeletal
1)
Parent material is alluvium and outwash; surface texture is gravelly sandy loam or stony sandy loam
... R048AY311CO – Mountain Outwash
2)
Site not as above - Not Applicable
b.
Site not as above
1)
Family particle size is clayey-skeletal
a)
Parent material is sandstone and/or shale; surface texture is loam or clay loam
... R048AY238CO – Brushy Loam
b)
Parent material is igneous, metamorphic and sedimentary rock; surface texture is very gravelly sandy clay loam, very stony loam or gravelly loam
... R048AY239CO – Brushy Mountain Loam
c)
Soils are > 40” in depth; surface texture very gravelly, gravelly or very cobbly loam or very sandy loam.
... R048AY377CO – Skeletal Loam
2)
Site not as above
a)
Family particle size is loamy-skeletal
(1)
Parent material is basalt, sandstone, till, outwash, schist, granite, gneiss, igneous and/or metamorphic rock; soil surface texture is stony loam, extremely stony loam, cobbly loam, very stony loam, cobbly sandy loam or very cobbly sandy loam
... R048AY237CO – Stony Loam
(2)
Parent material is sandstone and/or shale; surface texture is loam or clay loam
... R048AY238CO – Brushy Loam
(3)
Parent material is igneous, metamorphic and sedimentary rock; surface texture is very gravelly sandy clay loam, very stony loam or gravelly loam
... R048AY239CO – Brushy Mountain Loam
(4)
Site not as above - Not Applicable
b)
Site not as above - Not Applicable
ii.
Site not as above, soils are non-skeletal (less than 35% rock fragments
a.
Family particle size is fine-silty
1)
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam
... R048AY255CO – Pine Grasslands
2)
Site not as above - Not Applicable
b.
Site not as above
1)
Family particle size is fine-loamy
a)
Located in the Gunnison Basin
(1)
Parent material is rhyolite, granite volcanic rock, sedimentary rock, igneous and/or metamorphic rock; surface texture is loam or gravelly sandy loam
... R048AA228CO – Mountain Loam Gunnison Basin LRU
(2)
Site not as above - Not Applicable
b)
Site not as above
(1)
Parent material is sandstone, shale, igneous rock, metamorphic rock, schist, and/or granite. Surface texture is loam, sandy loam, gravelly sandy loam or silt loam; 0-30% slope
... R048AY228CO – Mountain Loam
(2)
Parent material is granite, gneiss, schist, sandstone, shale, igneous rock and/or metamorphic rock, surface texture is loam or sandy loam, slope 0-30%
... R048AY222CO – Loamy Park
(3)
Parent material is igneous, metamorphic and/or sedimentary rock; surface texture is very gravelly sandy clay loam, very stony loam or gravelly loam; 3-50% slope
... R048AY239CO – Brushy Mountain Loam
(4)
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam; 0-30% slope
... R048AY255CO – Pine Grasslands
(5)
Parent material is sandstone; surface texture is cobbly fine sandy loam; slope is 25-75%
... R048AY379CO – Brushy Slopes
(6)
Site not as above - Not Applicable
2)
Site not as above
a)
Family particle size is fine
(1)
Located on the western slope in Colorado around the Grand Mesa to the North/West part of the San Juan Mountains and the Gunnison Basin (Shale Highlands LRU); parent material is Mancos/ Wasatch shale and/or siltstone; surface texture is clay loam, silty clay loam or loam
... R048AA247CO – Deep Clay Loam Shale Highlands LRU
(2)
Not located in Shale Highland LRU (Grand Mesa to the North/West part of the San Juan Mountains and the Gunnison Basin); Parent material is shale, igneous rock, metamorphic rock and/or sedimentary rock, surface texture is clay loam, loam, or silt loam
... R048AY247CO – Deep Clay Loam
(3)
Parent material sandstone and/or shale. Surface texture is loam, clay loam, very stony loam, cobbly loam, sandy loam, cobbly sandy loam, very bouldery sandy loam, or fine sandy loam
... F048AY925CO – Ponderosa Pine Forest
(4)
Parent material sandstone and shale; surface texture is loam, clay loam, or very cobbly loam
... R048AY234CO – Mountain Clay
(5)
Parent material is sandstone, shale, siltstone, igneous rock and/or metamorphic rock; surface texture is loam, gravelly loam, cobbly loam, stony loam, channery sandy loam, gravelly fine sandy loam, sandy loam, or fine sandy loam
... R048AY255CO – Pine Grasslands
(6)
Parent material is shale, sandstone and/or siltstone; surface texture is clay loam, loam, gravelly loam, or silty clay loam
... R048AY248CO – Mountain Clay Loam
(7)
Parent material is shale and/or sandstone; surface textures is clay loam or loam
... R048AY257CO – Clayey Valley
(8)
Site not as above - Not Applicable
b)
Site not as above - Not Applicable
IV.
Precipitation 20-40 inches (ustic udic and typic udic); cryic temperature regime; below tree-line; approximately 8,000 – 10,000 feet in elevation - Subalpine Climate zone
A.
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
1
Site occurs on the Grand Mesa; precipitation is 37-45 inches; Site in landscape position and receives run-in water; 20 inches or greater in depth; no water table present in 6 feet; family particle size is fine-loamy, clayey-skeletal or loamy-skeletal; soil surface texture is loam or gravelly loam
... R048AY253CO – Wet Subalpine
2
Site not as above - Not Applicable
B.
Site receives no extra water beyond normal precipitation
1
Site has bedrock within 20 inches of the soil surface
i.
Family particle size is loamy
a.
Precipitation is 20-30 inches; Parent material is sandstone, shale; basalt, andesite, tuff breccia and/or rhyolite; surface texture – loam, channery loam, sandy loam, extremely stony loam, gravelly silt loam or gravelly loam
... R048AY251CO – Shallow Subalpine
b.
Site not as above - Not Applicable
ii.
Site not as above
a.
Family particle size is clayey-skeletal
1)
Precipitation is 20-30 inches; parent material is shale and/or sandstone; surface texture is very gravelly loam, fine sandy loam or cobbly fine sandy loam
... F048AY912CO – Lodgepole Pine
2)
Site not as above - Not Applicable
b.
Site not as above
1)
Family particle size is loamy-skeletal
a)
Precipitation is 20-30 inches; Parent material is sandstone, shale; basalt, andesite, tuff breccia and/or rhyolite; surface texture – loam, channery loam, sandy loam, extremely stony loam, gravelly silt loam or gravelly loam
... R048AY251CO – Shallow Subalpine
b)
Precipitation is 20-30 inches; parent material is shale and/or sandstone; surface texture is very gravelly loam, fine sandy loam or cobbly fine sandy loam
... F048AY912CO – Lodgepole Pine
c)
Site not as above - Not Applicable
2)
Site not as above - Not Applicable
2
Not as above, site is greater than 20 inches in depth to bedrock
i.
Rock fragments greater than 35%
a.
Family particle size is clayey-skeletal
1)
Precipitation is 20-30 inches; parent material is shale and/or sandstone; surface texture is very gravelly loam, fine sandy loam or cobbly fine sandy loam
... F048AY912CO – Lodgepole Pine
2)
Precipitation is 20-30 inches; parent material is igneous, metamorphic rock, sedimentary rock; sandstone and shale, diorite and or rhyolite; surface texture is loam, stony loam, very stony loam, cobbly loam, gravelly loam or very cobbly loam
... F048AY449CO – Aspen Woodland
3)
Precipitation is 20-40 inches; parent material is igneous rock, metamorphic rock, sedimentary rock, sandstone and shale and/or volcanic breccia; surface texture is very cobbly sandy loam, very gravelly sandy loam very stony sandy loam, very cobbly fine sandy loam, stony fine sandy loam, loam, cobbly loam or gravelly loam
... F048AY918CO – Spruce-Fir Woodland
4)
Site not as above - Not Applicable
b.
Site not as above
1)
Family particle size is Loamy-skeletal
a)
Precipitation is 20 to 25 inches; parent material is sandstone and shale, andesite, or sedimentary rock; surface texture is very stony loam, loam, clay loam, stony sandy clay loam, or very stony sandy loam
... F048AY924CO – Douglas Fir/Gambel Oak
b)
Precipitation is 20-30 inches; parent material is igneous, metamorphic rock, sedimentary rock; sandstone and shale, diorite and or rhyolite; surface texture is loam, stony loam, very stony loam, cobbly loam, gravelly loam or very cobbly loam
... F048AY449CO – Aspen Woodland
c)
Precipitation is 20-30 inches; parent material is shale and/or sandstone; surface texture is very gravelly loam, fine sandy loam or cobbly fine sandy loam
... F048AY912CO – Lodgepole Pine
d)
Precipitation is 20-40 inches; parent material is granite, sandstone and shale, volcanic rock, gneiss, mica schist, or sandstone; surface textures is loam, very gravelly sandy loam, very stony sandy loam, stony sandy loam, stony loam, very stony loam, very cobbly loam, or gravelly fine sandy loam
... F048AY908CO – Mixed Conifer
e)
Precipitation is 20-40 inches; parent material is volcanic breccia; surface texture is cobbly ashy loam, cobbly ashy silt loam or cobbly loam
... F048AY915CO – Engelmann Spruce – Whortleberry– Jacob's-Ladder
f)
Precipitation is 20-40 inches; parent material is volcanic breccia or sandstone; surface textures is stony loam, stony ashy loam, or cobbly ashy loam
... F048AY917CO – Abies lasiocarpa/Paxistima myrsinites/Erigeron eximius
g)
Precipitation is 20-40 inches; parent material is volcanic breccia; surface textures is very stony ashy loam
... F048AY919CO – Subalpine Fir/Blueberry/Twinflower
h)
Precipitation is 20-40 inches; parent material is volcanic breccia or tuff; surface textures is stony ashy loam or cobbly loam
... F048AY921CO – White Fir/Snowberry
i)
Precipitation is 20-40 inches; parent material is igneous rock, metamorphic rock, sedimentary rock, sandstone and shale and/or volcanic breccia; surface texture is very cobbly sandy loam, very gravelly sandy loam very stony sandy loam, very cobbly fine sandy loam, stony fine sandy loam, loam, cobbly loam or gravelly loam
... F048AY918CO – Spruce-Fir Woodland
j)
Site not as above - Not applicable
2)
Site not as above - Not Applicable
ii.
Site is not as above, rock fragments less than 35%
a.
Family particle size is fine
1)
Precipitation is 20-30 inches; parent material is igneous, metamorphic rock, sedimentary rock; sandstone and shale, diorite and or rhyolite; surface texture is loam, stony loam, very stony loam, cobbly loam, gravelly loam or very cobbly loam
... F048AY449CO – Aspen Woodland
2)
Precipitation is 20-30 inches; parent material is sandstone and shale; or igneous, metamorphic and sedimentary rock; surface texture is loam, clay loam or silt loam
... R048AY252CO – Subalpine Clay
3)
Site not as above - Not Applicable
b.
Site not as above
1)
Family particle size is fine-loamy
a)
Precipitation is 20 to 25 inches; parent material is sandstone and shale, andesite, or sedimentary rock; surface texture is very stony loam, loam, clay loam, stony sandy clay loam, or very stony sandy loam
... F048AY924CO – Douglas Fir/Gambel Oak
b)
Located in Gunnison Basin; precipitation is 20-30 inches; parent materials andesite, rhyolite or sandstone and shale; surface texture is loam
... R048AA250CO – Subalpine Loam Gunnison Basin LRU
c)
Site not in the Gunnison Basin; parent material is sandstone, shale, volcanic rock, or igneous, metamorphic and sedimentary rock; surface texture is loam
... R048AY250CO – Subalpine Loam
d)
Precipitation is 20-30 inches; parent material is igneous, metamorphic rock, sedimentary rock; sandstone and shale, diorite and or rhyolite; surface texture is loam, stony loam, very stony loam, cobbly loam, gravelly loam or very cobbly loam
... F048AY449CO – Aspen Woodland
e)
Precipitation is 20-40 inches; parent material is granite, sandstone and shale, volcanic rock, gneiss, mica schist, or sandstone; surface textures is loam, very gravelly sandy loam, very stony sandy loam, stony sandy loam, stony loam, very stony loam, very cobbly loam, or gravelly fine sandy loam
... F048AY908CO – Mixed Conifer
f)
Precipitation is 20-40 inches; parent material is igneous rock, metamorphic rock, sedimentary rock, sandstone and shale and/or volcanic breccia; surface texture is very cobbly sandy loam, very gravelly sandy loam very stony sandy loam, very cobbly fine sandy loam, stony fine sandy loam, loam, cobbly loam or gravelly loam
... F048AY918CO – Spruce-Fir Woodland
g)
Site not as above - Not applicable
2)
Site not as above - Not Applicable
V.
Precipitation is 30-50 inches (Typic Udic); cryic temperature regime; above tree-line; approximately 10,000-14,440 feet in elevation - Alpine Climate Zone
A.
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
1
Site has perennial water table 0-12 inches in depth; soil depth is greater than 60 inches; soil surface texture is loam, cobbly loam or silt loam
... R048AY305CO – Alpine Meadow
2
Site not as above
i.
Site occurs on the Grand Mesa; precipitation is 37-45 inches; Site in landscape position and receives run-in water; 20 inches or greater in depth; no water table present in 6 feet; family particle size is fine-loamy, clayey-skeletal or loamy-skeletal; soil surface texture is loam or gravelly loam
... R048AY253CO – Wet Subalpine
ii.
Site not as above - Not Applicable
B.
Site receives no extra water beyond normal precipitation
1
Site have bedrock within 20 inches of the soil surface
i.
Family particle size is loamy or loamy-skeletal; Surface texture is very gravelly loam, very stony loam, very cobbly loam, very stony sandy loam, very cobbly sandy loam, loam or very cobbly silt loam
... R048AY308CO – Shallow Alpine
ii.
Site not as above - Not Applicable
2
Not as above, Site is greater than 20 inches in depth to bedrock
i.
Rock fragments greater than 35% and family particle size is loamy-skeletal
a.
0-30% slopes
1)
Parent material is colluvium, till, basalt, rhyolite, tuff, volcanic breccia, and/or andesite; soil surface texture is very gravelly loam, cobbly loam, stony loam, or gravelly silt loam
... R048AY306CO – Shrubby Alpine
2)
Parent material rhyolite, tuff, volcanic rock and/or sandstone; soil surface texture is very gravelly loam, loam, or very stony sandy loam; 10-60% slopes
... R048AY309CO – Warm Alpine
3)
Site not as above - Not applicable
b.
Slopes is 30-60%
1)
Parent material rhyolite, tuff, volcanic rock and/or sandstone; soil surface texture is very gravelly loam, loam, or very stony sandy loam; 10-60% slopes
... R048AY309CO – Warm Alpine
2)
Parent material is monzonite, diorite, conglomerate, rhyolite, volcanic rock sandstone, granite, gneiss, schist, andesite, tuffigneous rock and/or metamorphic rock; Surface texture is very gravelly loam, gravelly loam, extremely gravelly loam, very cobbly loam, extremely cobbly loam, very stony loam, or extremely stony sandy loam; 30-60% slopes
... R048AY304CO – Alpine Slopes
3)
Site not as above - Not applicable
ii.
Site not as above - Not applicable
MLRA 48A Key New Mexico
I.
Located in LRU RM-1. These sites are found on the east side of Sangre de Cristo mountains.
A.
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
1
Site has water table 0-36 inches in depth, soil depth is > 60 inches; family particle size is fine or fine loamy
... R048AY006NM – Mountain Meadow
2
Site not as above
i.
Site in landscape position that receives run-in water, no water table present in 6 feet; family particle size is fine-loamy or fine
... R048AY003NM – Mountain Valley
ii.
Site not as above - not written
B.
Site receives no extra water beyond normal precipitation
1
Precipitation is 20-30”; Elevation is 9,000 ft or higher – Subalpine climate zone
i.
Parent material basalt; soils depth is greater than 60 inches; family particle size can be fine, fine-loamy or loamy-skeletal
... R048AY001NM – Subalpine Grassland
ii.
Site not as above not written or see Colorado MLRA 48A key for more sites
2
Precipitation is usually 16-20 inches (precipitation can range from 15 to 25 with aspect differences); elevation is approximately 7,000 to 9,000 feet.– Mountain climate zone
i.
Site has bedrock within 20 inches of the soil surface
a.
Parent material is shale
2)
Site not as above
b)
Site not as above - not written
b.
Parent material is not shale
1)
Soils are skeletal (greater than 35% rock fragments)
a)
Parent material basalt, volcanic rock and metamorphic rock; family particle size is clayey-skeletal or loamy-skeletal
... R048AY005NM – Mountain Malpais
b)
Site not as above - not written
2)
Site not as above
a)
Parent material sandstone, shale, basalt and limestone family particle size is loamy
... R048AY008NM – Mountain Brush
b)
Site not as above - not written
ii.
Site not as above - soil depth is greater than 20 inches
a.
Soils are skeletal (greater than 35% rock fragments)
2)
Site not as above - not written
b.
Site not as above
1)
Fine family particle size
b)
Site not as above
(1)
Parent material is basalt, igneous rock, metamorphic rock, sandstone, shale, or other sedimentary rock, soil depth greater than 40 inches
... R048AY002NM – Mountain Grassland
(2)
Site not as above - not written
2)
Site not as above
a)
Site is fine-loamy family particle size
(1)
Parent material is basalt, igneous rock, metamorphic rock, sandstone, shale, or other sedimentary rock, soil depth greater than 40 inches
... R048AY002NM – Mountain Grassland
(2)
Site not as above - not written
b)
Site not as above - not written
II.
Located in LRU RM-2. These sites are found on the west side of Sangre de Cristo mountains, Tusas Mountains (southern San Juan mountains) and Jemez Mountains.
A.
Site receives extra water beyond normal precipitation through high water table, riparian area, or run-in water
1
Site has water table 0-60 inches in depth, soil depth is greater than 60 inches; family particle size is fine or fine loamy
... R048AY016NM – Mountain Meadows
2
Site not as above
i.
Site in landscape position and receives run-in water, no water table present in 6 feet; family particle size –fine; parent material - shale
... R048AY014NM – Mountain Valley Dry
ii.
Site not as above - not written
B.
Site receives no extra water beyond normal precipitation
1
Precipitation is 25-40”; approximately 9,000 to 12,000 feet in elevation – Subalpine climate zone
i.
Soils depth is greater than 60 inches; family particle size is loamy-skeletal; parent material, rhyolite, granite, gneiss, volcanic rock metamorphic
... R048AY011NM – Subalpine Grassland Dry
ii.
Site not as above not written or see Colorado MLRA 48A key for more sites
2
Precipitation is 16-25”; approximately 7,000 to 9,000 feet in elevation Mountain climate zone
i.
Site has bedrock within 20 inches of the soil surface
a.
Family particle size is clayey
2)
Site not as above
b)
Site not as above - not written
b.
Site not as above - not written
ii.
Site not as above - soil depth is greater than 20 inches
a.
Site has greater than 35% rock fragments
1)
Family particle size is clayey-skeletal; parent material is igneous rock and/or metamorphic rock
... R048AY010NM – Pine Grassland
2)
site not as above
a)
Family particle size is loamy-skeletal; parent material is igneous rock and/or metamorphic rock
... R048AY009NM – Mountain Breaks
b)
Site not as above
(1)
Family particle size is loamy-skeletal; parent material is rhyolite, tuff, sandstone and/or shale
... R048AY012NM – Mountain Loam Dry
(2)
Site not as above - not written
b.
Site not as above; less than 35% rock fragments
1)
Family particle size is fine; parent material is sandstone and/or shale
a)
Surface texture is loam and soil depth is greater than 20 inches
... R048AY013NM – Mountain Slopes
b)
Site not as above
(1)
Surface texture clay loam or channery clay loam; soils are 20-40 inches in depth
... R048AY015NM – Mountain Shale Dry
(2)
Site not as above - not written
2)
Site not as above
a)
Family particle size is fine-loamy
(1)
Parent material is igneous rock and/or metamorphic rock, soil surface texture is gravelly loam, soil depth greater than 60 inches
... R048AY009NM – Mountain Breaks
(2)
Site not as above
(a)
Parent material is rhyolite, tuff, sandstone and/or shale; soil surface texture is loam or silt loam, soil depth greater than 60 inches
... R048AY012NM – Mountain Loam Dry
(b)
Site not as above - not written
b)
Site not as above - not written
MLRA 48A - Utah
I.
Site receives extra water beyond normal precipitation through high water table and/or run-in water
A.
Water table depth is generally 50 inches or greater below the surface and soils are loamy skelatal (>35% rock fragment)
1
Dominant aspect of this site is shrubs
... R048AY007UT – Loamy Bottom (Basin Big Sagebrush/Basin Wildrye)
2
Dominant aspect of this site is shrub
i.
Site dominated by willows, soil profile is fine loamy (low rock content, 18-35% clay)
... R048AY008UT – Wet Fresh Meadow (Willow-Sedge)
ii.
Site dominated by willow, and soil profile is coarse loamy (<35% rock fragments)
... R048AY010UT – Wet Fresh Streambank (Willow)
3
Soil sub-surface gravel volume is generally greater than 30% and dominant tree is narrowleaf cottonwood
i.
Soil sub-surface gravel volume is generally greater than 30% and dominant tree is narrowleaf cottonwood
... R048AY005UT – Semiwet Fresh Streambank (Narrowleaf Cottonwood)
ii.
Soil sub-surface gravel volume is less than 10% and the dominant tree is water birch
... R048AY006UT – Semiwet Fresh Streambank
II.
Greater than 35" annual precipitation
A.
Site is above timberline
1
Gravels on surface are greater than 20% and soil profile is loamy-skeletal and fragmental (>35% rock fragments by volume)
... R048AY610UT – Alpine Slope
B.
22" - 40" annual precipitation
1
Slope generally less than 30%
i.
Surface soil texture loam and soil profile contains less than 10% rock fragment by volume
... R048AY516UT – High Mountain Loam (Mountain Big Sagebrush)
ii.
Surface soil texture loam to silt loam and soil profile contains greater than 10% rock fragment by volume
... R048AY503UT – High Mountain Clay
iii.
Soil depth is generally moderately deep to deep (20-60”) with gravels on the surface less than 15% by volume
... F048AY506UT – High Mountain Loam (Aspen)
iv.
Soil depth is generally moderately deep (20-40”) and are generally associated/adjacent to aspen sites dominated by herbaceous species
... R048AY515UT – High Mountain Loam (Thurber Fescue)
v.
Soil depths generally shallow (< 20%) with gravelly silt loam surface texture.
... R048AY518UT – High Mountain Gravelly Loam (Mountain Big Sagebrush)
2
Slope generally greater than 30%
i.
Rock fragments in the top 24” generally greater than 50% by volume
a.
Surface textures are generally gravelly or cobbly loam with surface rock fragments greater than 10%
... F048AY524UT – High Mountain Stony Loam (Engelmann Spruce)
b.
Surface textures are generally fine sandy loam to gravelly sandy loam with surface rock fragments less than 10%.
... F048AY523UT – High Mountain Stony Loam (Douglas Fir)
ii.
Rock fragments in the top 24” generally less than 50% by volume
a.
Soil epipedon is generally pachic (mollic and greater than 20” thick)
... F048AY528UT – High Mountain Very Steep Loam (Aspen)
b.
Surface soil texture is coarse (very stony or bouldery)
... F048AY530UT – High Mountain Very Steep Loam (Douglas Fir)
c.
Surface soil texture is finer (loam to fine sandy loam)
1)
Rock fragments on the soil surface are generally greater than 15%.
... F048AY532UT – High Mountain Very Steep Stony Loam (Engelmann Spruce)
2)
Rock fragments on the soil surface are generally less than 15%.
... F048AY509UT – High Mountain Loam (Douglas-Fir)
III.
16" - 22" annual precipitation (except some south and west slopes or soils with poor water holding capacity), adjacent areas are capable of supporting gambel oak
A.
Generally restrictive layer 20” or less from the soil surface
1
Surface textures are mostly cobbly loam (rocks 3-10” 10-20% of by volume)
... R048AY442UT – Mountain Shallow Loam (Salina Wildrye)
2
Surface textures are mostly channery loam with current or past evidence of trees occupying the site
... R048AY443UT – Mountain Shallow Loam (Mixed Conifer)
3
Surface textures are mostly very gravelly loam (gravels 10-30% by volume)
... R048AY433UT – Mountain Shallow Loam (Black Sagebrush)
4
Surface textures are mostly gravelly sandy loam with current or past evidence of trees occupying the site
... F048AY439UT – Mountain Shallow Loam (Ponderosa pine)
5
Surface textures are loam with Gambel’s oak likely the dominant aspect of the site
... R048AY430UT – Mountain Shallow Loam (Oak)
6
Surface soil textures are predominately fine sandy loam, but have a gravel modifier as well
... R048AY436UT – Mountain Shallow Loam (Mountain Big Sagebrush)
B.
Generally restrictive layer greater than 20” from the soil surface
1
Top 24” of soil profile generally contains greater than 50% rock fragments by volume
i.
Surface soil texture mainly extremely boulder fine sandy loam or very channery loam
... R048AY478UT – Mountain Windswept Ridge
ii.
Surface soil texture mainly channery/very channery loam with past or present evidence of tree occupying the site
... F048AY452UT – Mountain Stony Loam (Douglas Fir)
iii.
Surface soil texture mainly loam to very fine sandy loam
... R048AY448UT – Mountain Stony Loam (Mountain Big Sagebrush)
iv.
Surface soil texture mainly very cobbly very fine sandy loam to stony loam with past or present evidence of trees occupying the site
... F048AY457UT – Mountain Stony Loam (Ponderosa pine)
v.
Surface soil texture mainly sandy loam to gravelly sandy loam and does not have rock fragments greater than 3” on the soil surface
... R048AY449UT – Mountain Stony Loam (Black sagebrush)
vi.
Surface soil texture mainly gravelly sandy loam to loam, has less than 10% rock fragments on the soils surface greater than 3”
... R048AY451UT – Mountain Stony Loam (Shrub)
vii.
Surface soil textures mainly extremely stony loam to extremely boulder fine sandy loam with slopes typically greater than 50% and past/present evidence of trees occupying the site
... F048AY475UT – Mountain Very Steep Stony Loam (Douglas Fir)
viii.
Surface soil textures mainly gravelly sandy loam with slopes generally greater than 50%
... R048AY473UT – Mountain Very Steep Stony Loam (Shrub)
2
Top 24” of soil profile generally contains less than 50% rock fragments by volume
i.
Slopes on site typically greater than 50%
a.
Surface soil texture sandy loam with past/present evidence of trees occupying the site
... F048AY463UT – Mountain Very Steep Loam (Douglas Fir)
b.
Surface soil textures mainly stony/extremely stony loam, to very channery loam
... R048AY466UT – Mountain Very Steep Loam (Salina Wildrye)
d.
Surface soil textures are mainly very channery loam and rock fragment on the soil surface is larger than 3”
... R048AY471UT – Mountain Very Steep Loam (Curlleaf mountainmahogany)
c.
Surface soil textures mainly fine sandy loam to loam with past/present evidence of Gambel’s oak on the site
... R048AY465UT – Mountain Very Steep Loam (Oak)
ii.
Slopes on site typically less than 50%
a.
Site occurs in area that receive additional moisture from adjacent upland sites
... R048AY410UT – Mountain Loamy Bottom (Basin Wildrye)
b.
Site not as above
1)
Present or past evidence that trees dominated this site
... R048AY417UT – Mountain Loam (Ponderosa Pine)
2)
Surface soil texture mainly loam to stony loam with the past/present evidence of Gambel’s oak as the dominant aspect of the site
... R048AY415UT – Mountain Loam (Oak)
3)
Surface soil texture mainly stony to clay loam with the dominant aspect of the site being a grass
... R048AY409UT – Mountain Loam (Salina Wildrye)
5)
Surface soil texture mainly loam, fine sandy loam to cobbly fine sandy loam
... R048AY405UT – Mountain Loam (Mountain Big Sagebrush)
IV.
12" - 16" annual precipitation. Up to 20" on south and west slopes or soils with poor water holding capacity, site is too dry to support gambel oak
A.
Generally restrictive layer 20” or less from the soil surface
2
Surface textures are mostly channery or gravelly sandy loam (surface fragments 10-30% by volume)
... R048AY320UT – Upland Shallow Loam (Black sagebrush)
3
Surface textures are mostly very channery loam (surface fragments 10-30% by volume)
... R048AY322UT – Upland Shallow Loam (Two-Needle Pinyon / Utah Juniper)
9
Surface textures are mostly very channery loam and rock content in the top 24" is greater than 35% by volume.
... F048AY330UT – Upland Shallow Stony Loam (Two-Needle Pinyon /Douglas Fir)
8
Surface soil textures are fine gravelly silty clay loam to gravelly loam and rock content is generally less than 35% of the soil volume
... R048AY309UT – Upland Loam (Birchleaf Mountain Mahogany)
6
Surface soil textures are predominately gravelly loam on outwash terraces (surface fragments 10-30%).
... R048AY323UT – Upland Shallow Hardpan (Black Sagebrush)
7
Surface soil texture mainly very channery loam (surface fragments 20-70%) with slopes greater than 35%.
... R048AY366UT – Upland Very Steep Loam (Salina Wildrye)
4
Surface textures are mostly gravelly fine sandy loam (surface fragments 10-40% by volume)
... R048AY332UT – Upland Shallow Stony Loam (Bonneville Big Sagebrush)
5
Surface textures are channery loam with slopes greater than 35%
... R048AY342UT – Upland Very Steep Shallow Loam (Pinyon-Utah Juniper)
B.
Generally restrictive layer greater than 20” from the soil surface
1
Top 24” of soil profile generally contains greater than 35% rock fragments by volume
i.
Surface soil texture mainly channery/extremely channery loam (surface fragments 10-60%).
... R048AY331UT – Upland Stony Loam (Pinyon-Utah Juniper)
ii.
Surface soil texture mainly channery or bouldery sandy loam (surface fragments greater than 35%).
... R048AY334UT – Upland Stony Loam (basin big sagebrush-saline wildrye)
2
Top 24” of soil profile generally contains less than 35% rock fragments by volume
i.
Surface soil texture mainly channery fine sandy loam (surface fragments 10-30%).
... R048AY311UT – Upland Gravelly Loam (Bonneville Big Sagebrush)
ii.
Surface soil texture mainly loamy sand are excessively drained on alluvial fans
... R048AY312UT – Upland Sand (Basin big sagebrush)
iii.
Surface soil texture mainly loam, may have a gravelly modifier, has less than 10% rock fragments on the soils surface
... R048AY306UT – Upland Loam (Wyoming Big Sagebrush)
iv.
Surface soil texture mainly loam to silty clay loam, may have a gravelly modifier, has less than 10% rock fragments on the soils surface
... R048AY308UT – Upland Loam (Bonneville Big Sagebrush)
MLRA 48A Wyoming
I.
Precipitation is 16-20 inches; site has no water table or receives run-in moisture; family particle size is fine-loamy; surface texture is loam, clay loam, sandy clay loam or gravelly loam
... R048AY122WY – Mountain Loam
II.
Site not as above
The Ecosystem Dynamics Interpretive Tool is an information system framework developed by the USDA-ARS Jornada Experimental Range, USDA Natural Resources Conservation Service, and New Mexico State University.
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