Natural Resources
Conservation Service
Major Land Resource Area 018X
Major Land Resource Area
Accessed: 04/16/2026
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i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
-
i
Key Characteristics
- Site located north of the Columbia River.
- Within a national park soil survey or in an area joining with a national park in the Washington Cascades Range
- MOUNT RAINIER NATIONAL PARK
- Site is forested, and more than 25 percent is covered with trees
- Site is composed primarily of coniferous tree species. If yes, go to “m.” m. Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory.
- Site commonly is at an elevation of 1,600 to 4,600 feet above sea level, in the southern Washington Cascades. Western hemlock typically in the overstory
- Site is in depressions and stream channels of terraces, debris aprons, and valley walls. A seasonal high water table is at a depth of 10 to 20 inches from the soil surface some time during the growing season. Common overstory species are western hemlock, western redcedar, Douglas-fir, and Sitka spruce. Southern Washington Cascades Moist Frigid Coniferous Forest (F003XN942WA).
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Soil texture
Azonal, ecological sites defined by hydrology rather than soil properties (ie riparian) (LRUX)
Not as above,
Soils in a thermic temperature regime
Soils in a mesic temperature regime
Site receives surface water flow or has a water table associated with stream hydrology
Site not as above
Site occurs along perennial streams and rivers
Site associated with ephemeral streams or drainages - R018XX999CA
Stream gradient steep (exceeding 15%)
R018XX100CA – Intermittent Steep A Channels
R018XX100CA – Intermittent Steep A Channels
Lower stream gradient, often higher order stream (4th or above)
R018XX101CA – Mid Gradient Riparian Complex, 4Th Order Stream
R018XX101CA – Mid Gradient Riparian Complex, 4Th Order Stream
Site occurs on concave landscape positions- dominated by Juncus, Carex and forbs - follow key for LRU I
Site not as above
Site occurs in a meadow or near a stream riparian complex- but on soils which support upland plant species- Valley oak common in overstory - follow key for LRU I
Site not as above, may be another type of wetland not associated with streams - R018XX999CA
Site occurs in alluvial floodplains, but vegetation is more upland: oaks, Valley oak dominates the site - LRU 22AI
Site is clearly riparian. - LRU 22AX
Geology consists of young (Tertiary) volcanic flows originating in Southern Cascades (north & west of Lake Oroville) (LRU A)
Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
Soil temperature regime thermic
Soil temperature regime mesic
Riparian systems (lentic, lotic, floodplains, etc.) - R018XX999CA
Site not as above, primarily bedrock controlled soils
Occur on plateau formations. Soils within a swale/mound microtopgraphy complex
R018XA101CA – Basalt Flow Plateaus
R018XA101CA – Basalt Flow Plateaus
Site not as above
Landform a lower foothill position or strath terrace, generally water shedding positions
R018XA102CA – Clayey Thermic Terraces
R018XA102CA – Clayey Thermic Terraces
Not as above
Soils on volcanic ridges or rocky, undulating foothills
Soils occur in concave landscape position on hills, or undulating plateaus with deep to very deep soils F018XA201
F018XA201CA – Deep Thermic Hillslopes
F018XA201CA – Deep Thermic Hillslopes
Soils very shallow to shallow (AWC < 3)
R018XA103CA – Shallow Thermic Volcanic Ridges
R018XA103CA – Shallow Thermic Volcanic Ridges
Soils not as above
Soil occurs on volcanic cone, in a mesic pocket (otherwise thermic dominated area) and with infrequent plant communities of knobcone pine/incense cedar/ ponderosa pine
CX018XA203 – Mesic Volcano Cones
CX018XA203 – Mesic Volcano Cones
Site not as above
R018XA999CA – Miscellaneous - Cannot Be Correlated
R018XA999CA – Miscellaneous - Cannot Be Correlated
Soil texture class medial or with an isotic mineralogy class (vegetation tends to be dominated by coniferous forest, including sugar pine, doulgas fir, knobcone pine) - F018XA203CA
CX018XA203 – Mesic Volcano Cones
CX018XA203 – Mesic Volcano Cones
Site not as above
Soils are very shallow to shallow - support open blue oak with annual herbaceous communities
R018XA104CA – Shallow Mesic Volcanic Ridges
R018XA104CA – Shallow Mesic Volcanic Ridges
Soils are moderately deep to deep - support closed oak woodland with scattered pine.
F018XA202CA – Deep Mesic Mountain Slopes & Summits
F018XA202CA – Deep Mesic Mountain Slopes & Summits
Geology is dominated by granitoid almost exclusively. Break between Valley (MLRA 17) and the foothills abrupt, with steep slopes occuring from the lowest foothills to the MLRA 18/22A break.
Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
Subhumid climate. Soil moisture regime is xeric and only aridic at the lowest elevations (usually in conjunction with the valley). (LRU C)
Semi-arid climate with interchanging soil moisture regimes (xeric & aridic). Moderately to steep hills & mountains at southern end of Great Central Valley.
Soil chemistry a key factor in defining site- ultramafic soils with reduced productivity
R018XC106CA – Thermic Ultramafic Foothills
R018XC106CA – Thermic Ultramafic Foothills
Soil chemistry a lesser contributing factor
Mean Annual Precipitation (MAP) < 23 "
MAP ≥ 23
Soils have shrink-swell properties and clayey PSC
Site not as above
Slope percent < 25, on terraces and low hills
R018XC101CA – Thermic Clayey Terraces and Hills
R018XC101CA – Thermic Clayey Terraces and Hills
Slope percent ≥ 25, on upper foothills and mountains
R018XC102CA – Steep Thermic Clayey Shallow
R018XC102CA – Steep Thermic Clayey Shallow
Soils shallow depth class
Soils moderately deep to deeper
R018XC105CA – Thermic Foothills
R018XC105CA – Thermic Foothills
Soils occuring on lower foothill position, slope < 25%
R018XC103CA – Lithic Thermic Foothills
R018XC103CA – Lithic Thermic Foothills
Soils occuring on steep slopes (≥ 25%), with rock outcrop area > 25%
R018XC104CA – Thermic Free Face Foothills
R018XC104CA – Thermic Free Face Foothills
MAP ≥ 30
MAP < 30 inches
Site occurs in shallow to moderately deep soils
Site occurs in deep to very deep soils on concave positions
Soils on granite and support dense chaparral - R018XC107CA
R018XC107CA – Thermic Granitic Foothills south-facing
R018XC107CA – Thermic Granitic Foothills south-facing
Soils on other parent materials
Soils are on marble, often on canyon walls, yucca-chamise associations are common - R018XC109CA
R018XC109CA – Steep Marble Canyon Walls
R018XC109CA – Steep Marble Canyon Walls
Soils not as above
R018XC999CA – Miscellaneous - Cannot Be Correlated
R018XC999CA – Miscellaneous - Cannot Be Correlated
Site occurs in steep narrow drainages , often metamorphic PM, dominated by California buckeye and mesic chaparral shrubs (Mahogany, flannelbush) - R018XC110CA
R018XC110CA – Cool Thermic Shallowly Dissected Slopes
R018XC110CA – Cool Thermic Shallowly Dissected Slopes
Site occurs on broadly concave mountain slopes, generally in granite PM, closed canopy (interior/canyon live oak) and buckeye, often with California bay. - F018XC203CA
F018XC203CA – Cool Thermic Slopes
F018XC203CA – Cool Thermic Slopes
Soils occur on south to southwest aspects, shallow to moderately deep soils- chaparral
R018XC107CA – Thermic Granitic Foothills south-facing
R018XC107CA – Thermic Granitic Foothills south-facing
Site ocurs on all aspects, generally on moderately deep to very deep soils. Vegetation consists of blue oak woodland and savannas - F018XC201CA
F018XC201CA – Thermic Granitic Foothills
F018XC201CA – Thermic Granitic Foothills
Mean elevation > 3,200 ft (soil temperature regime thermic to mesic). This LRU occurs at the crossroads of several MLRA's. Vegetation patterns reflect the confluence of desert (MLRA 29), mountains (MLRA 22A), and foothills (MLRA 18) vegetation, to include juniper/ blue oak woodlands, yucca and other species from adjacent regions. (MLRA 22AO)
Mean elevation < 3,200 ft (Vegetation patterns conform to vegetation classes and ecosystem dynamics of other LRU's in MLRA 18 with annual grasslands/ blue oak savannahs being most common plant community.) (LRU E)
Riparian (driven by hydrological features) - R018XX999CA
Site is an upland
Soil temperature regime is solidly thermic and landform is hills or terraces
Soil temperature regime is borderline mesic and landform is hills or mountains (buckeye, foothill pine, and interior live oak indicator species) -F018XE201
F018XE201CA – Granitic Hills and Mountains
F018XE201CA – Granitic Hills and Mountains
Soils are calcareous and very deep, pH ranges into alkaline (> 8 pH) - R018XE101CA
R018XE101CA – Very Deep Alkaline Alluvium
R018XE101CA – Very Deep Alkaline Alluvium
Soils not as above
Soils have heavy texture or exhibit cracks with seasonal wetting-drying cycles - R018XE102CA
R018XE102CA – Steep Clayey Shallow
R018XE102CA – Steep Clayey Shallow
Site not as above
Soils are shallow (AWC 1-2 inches); vegetation is annual forbs/grasses with very few trees - R018XE103CA
R018XE103CA – Loamy Low Hills
R018XE103CA – Loamy Low Hills
Soils are moderately deep to deep (AWC 3-5 inches), often with mollic epipedons; vegetation includes oak woodland with dense annuals. - R018XE104CA
R018XE104CA – Thermic Granitic Hills
R018XE104CA – Thermic Granitic Hills
Site occurs on ultramafic soils
Site not as above
Site with very low Ca:Mg ratios ( 0.5) indicated by greater cover of barren soil/rock
R018XI102CA – Thermic Ultramafic Foothills Extremely High Magnesium Content (Ca:Mg Ratio Less Than 0.5)
R018XI102CA – Thermic Ultramafic Foothills Extremely High Magnesium Content (Ca:Mg Ratio Less Than 0.5)
Site not as above
Sites with Ca:Mg ratios greater than 0.5 (but rarely than 2.0) continuous vegetation with only minor breaks
R018XI103CA – Thermic Ultramafic Foothills Moderately High Magnesium Content (Ca:Mg Ratio 0.5 To 2)
R018XI103CA – Thermic Ultramafic Foothills Moderately High Magnesium Content (Ca:Mg Ratio 0.5 To 2)
Sites on north-facing slopes greater in shrub diversity
R018XI104CA – Thermic Ultramafic North-Facing Steep Slopes
R018XI104CA – Thermic Ultramafic North-Facing Steep Slopes
Site occuring on lava plateaus or erosion remnants, and skirting the adjacent hillslopes
Site occurs on a hill or hillslope (various geologies)
Soils very shallow to shallow (annual forbs & grasses)
R018XI101CA – Shallow Latite Ridgetops
R018XI101CA – Shallow Latite Ridgetops
Soils moderately to very deep (oak/shrub savannahs)
F018XI207CA – Deep Volcanic Plateaus and Hills
F018XI207CA – Deep Volcanic Plateaus and Hills
Mean Annual Precipitation (MAP) is generally well below 18 inches
MAP is at least 18 inches
Sites consist of ridges and or terraces or alluvial fan remnants
Sites are low, rolling dissected erosional surfaces, concave and accumulation of fine particles
R018XI164CA – Clayey Dissected Swales
R018XI164CA – Clayey Dissected Swales
Sites occurring on shallow to moderately deep soils, sometimes rocky
Sites occur on deeper soils located on backslopes to footslopes
F018XI208CA – Deep Low Rolling Hills and Terraces
F018XI208CA – Deep Low Rolling Hills and Terraces
Soils are shallow (often over tuffaceous parent materials)
R018XI163CA – Thermic Low Rolling Hills
R018XI163CA – Thermic Low Rolling Hills
Soils not as above
R018XI999CA – Miscellaneous - Cannot Be Correlated
R018XI999CA – Miscellaneous - Cannot Be Correlated
MAP ≤ 25 inches
MAP > 25 inches
Concave-Concave microsite positions - generally dominated by Juncus-Carex and annual forbs
R018XI111CA – Low Gradient, Concave Depressions
R018XI111CA – Low Gradient, Concave Depressions
Site on upland, bedrock controlled
Shallow to moderately deep soils, parent material derived from metavolcanic, slate, or granitic lithologies.
F018XI200CA – Low Elevation Foothills
F018XI200CA – Low Elevation Foothills
Soils towards shallow end and very low AWC (< 2)- volcanic PM
R018XI107CA – Shallow, Undulating Volcanic Hills
R018XI107CA – Shallow, Undulating Volcanic Hills
Site is steep AND aspect dependent, generally occuring on north-facing slopes on lower elevations, and on reverse aspects (s-facing) as elevation increases
Not as above
Site approaching mesic STR but still thermic, generally annual ppt > 34
R018XI105CA – Mesic Steep Convex Slopes bordering thermic
R018XI105CA – Mesic Steep Convex Slopes bordering thermic
Site definitely thermic STR, ppt < 34
Slope exceed 55 %, often occuring on canyon walls, herbaceous plants are diverse and dominate the site
R018XI125CA – Very Steep Skeletal Hillslopes
R018XI125CA – Very Steep Skeletal Hillslopes
Slopes less than 55 %, chamise and other chaparral shrubs dominate site, generally thick. Very low cover of forbs and grasses
R018XI106CA – Steep Thermic Hillslopes and Canyon Walls
R018XI106CA – Steep Thermic Hillslopes and Canyon Walls
Site in thermic soil temperature regime
Site in a mesic STR
PM intrusive igneous, excluding footslope and toeslope positions (depositional areas)
Site not as above
South to west-facing aspects, usually chamise dominated - R018XI106CA
R018XI106CA – Steep Thermic Hillslopes and Canyon Walls
R018XI106CA – Steep Thermic Hillslopes and Canyon Walls
Cooler aspect. Blue oak/interior live oak woodland
F018XI205CA – Thermic Granitic Foothills
F018XI205CA – Thermic Granitic Foothills
Trees and vegetation stunted due to high Ca content (PM ~ marble)
F018XI206CA – Clayey Thermic Marble Hills
F018XI206CA – Clayey Thermic Marble Hills
Site not as above
Site dominated by volcanic bedrock
Site not as above
Soil depth shallow (Inks, Pentz, Amador soils) annuals dominate the site, AWC 1-4 - R018XI107CA
R018XI107CA – Shallow, Undulating Volcanic Hills
R018XI107CA – Shallow, Undulating Volcanic Hills
Soil depth deep to deeper, oak woodland or savannah, AWC 3-7 - F018XI207CA
F018XI207CA – Deep Volcanic Plateaus and Hills
F018XI207CA – Deep Volcanic Plateaus and Hills
Site occurs on moderately deep soils on slopes generally < 30%- blue oak, foothill pine, annual grasses, moderate density of shrubs.
F018XI201CA – Moderately Deep Thermic Foothills
F018XI201CA – Moderately Deep Thermic Foothills
Soils are generally deeper, live oak dominated and dense overstory - F018XI202CA
F018XI202CA – Deep Thermic Steep Hillslopes
F018XI202CA – Deep Thermic Steep Hillslopes
Site on sideslopes and often steeper and/or north-facing (California black oak dominant tree and high density of shrubs and a few conifers)
F018XI204CA – North-facing Steep Draws and Hillslopes
F018XI204CA – North-facing Steep Draws and Hillslopes
Site occurs along edges of MLRA 22A break, mesic STR more common
Site generally shallow occuring on narrow ridges or sideslopes below prominent ridges, vegetation consists of annuals forbs and grasses and scattered shrubs/foohtill pine - R022AI101CA
Site not as above, slope gradient generally steep
Soils shallow to moderately deep (rarely deep) on S-facing slopes. Vegetation consists of chaparral shrubs - R018XI105CA
R018XI105CA – Mesic Steep Convex Slopes bordering thermic
R018XI105CA – Mesic Steep Convex Slopes bordering thermic
Soils generally deeper and occur on all aspects, PIPO-oak-shrubland - F022AI201CA
Long term average mean annual precipitation
- No filter
- 35 – 40cm (14 – 16in)
- 40 – 50cm (16 – 20in)
- 50 – 60cm (20 – 24in)
- 60 – 80cm (24 – 31in)
- 80 – 100cm (31 – 39in)
- 100 – 120cm (39 – 47in)
- 120 – 140cm (47 – 55in)
—
cm
Long term average frost free days
- No filter
- 110 – 130days
- 130 – 150days
- 150 – 170days
- 170 – 190days
- 190 – 210days
- 210 – 230days
- 230 – 250days
- 250 – 270days
- 270 – 290days
- 290 – 310days
—
days
- No filter
- 0 – 200m (0 – 700ft)
- 200 – 400m (700 – 1300ft)
- 400 – 600m (1300 – 2000ft)
- 600 – 800m (2000 – 2600ft)
- 800 – 1000m (2600 – 3300ft)
- 1000 – 1200m (3300 – 3900ft)
- 1200 – 1400m (3900 – 4600ft)
- 1400 – 1600m (4600 – 5200ft)
—
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- Alluvial fan
- Canyon
- Canyon wall
- Depression
- Drainageway
- Fan piedmont
- Flood plain
- High hill
- Hill
- Hillslope
- Lahar
- Lava plateau
- Mountain slope
- Mountain valley
- Plateau
- Ridge
- Saddle
- Strath terrace
- Stream terrace
- Structural bench
- Terrace
- No filter
- Basalt
- Diorite
- Fanglomerate
- Gabbro
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- Granite and gneiss
- Granitoid
- Igneous, metamorphic and sedimentary
- Igneous, unspecified
- Latite
- Marble
- Metamorphic and sedimentary
- Metamorphic, unspecified
- Metasedimentary, unspecified
- Metavolcanics
- Quartz-diorite
- Sandstone, volcanic
- Schist, mica
- Schist, unspecified
- Sedimentary, unspecified
- Serpentinite
- Slate
- Tuff breccia
- Tuff, unspecified
- Ultramafic, unspecified
- Volcanic breccia, unspecified
- Volcanic, unspecified
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- Alluvium
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- Residuum
Soil surface texture
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- Clay
- Clay loam
- Coarse sandy loam
- Fine sandy loam
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- Loamy coarse sand
- Sandy clay loam
- Silty clay loam
- Silt loam
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Ecological site keys
MLRA 18
I.
Azonal, ecological sites defined by hydrology rather than soil properties (ie riparian) (LRUX)
A.
Soils in a thermic temperature regime
1
Site receives surface water flow or has a water table associated with stream hydrology
i.
Site occurs along perennial streams and rivers
b.
Lower stream gradient, often higher order stream (4th or above)
... R018XX101CA – Mid Gradient Riparian Complex, 4Th Order Stream
ii.
Site associated with ephemeral streams or drainages - R018XX999CA
2
Site not as above
i.
Site occurs on concave landscape positions- dominated by Juncus, Carex and forbs - follow key for LRU I
ii.
Site not as above
a.
Site occurs in a meadow or near a stream riparian complex- but on soils which support upland plant species- Valley oak common in overstory - follow key for LRU I
b.
Site not as above, may be another type of wetland not associated with streams - R018XX999CA
B.
Soils in a mesic temperature regime
1
Site occurs in alluvial floodplains, but vegetation is more upland: oaks, Valley oak dominates the site - LRU 22AI
2
Site is clearly riparian. - LRU 22AX
II.
Not as above,
A.
Geology consists of young (Tertiary) volcanic flows originating in Southern Cascades (north & west of Lake Oroville) (LRU A)
1
Soil temperature regime thermic
i.
Riparian systems (lentic, lotic, floodplains, etc.) - R018XX999CA
ii.
Site not as above, primarily bedrock controlled soils
a.
Occur on plateau formations. Soils within a swale/mound microtopgraphy complex
... R018XA101CA – Basalt Flow Plateaus
b.
Site not as above
1)
Landform a lower foothill position or strath terrace, generally water shedding positions
... R018XA102CA – Clayey Thermic Terraces
2)
Not as above
a)
Soils on volcanic ridges or rocky, undulating foothills
(2)
Soils not as above
(a)
Soil occurs on volcanic cone, in a mesic pocket (otherwise thermic dominated area) and with infrequent plant communities of knobcone pine/incense cedar/ ponderosa pine
... CX018XA203 – Mesic Volcano Cones
b)
Soils occur in concave landscape position on hills, or undulating plateaus with deep to very deep soils F018XA201
... F018XA201CA – Deep Thermic Hillslopes
2
Soil temperature regime mesic
i.
Soil texture class medial or with an isotic mineralogy class (vegetation tends to be dominated by coniferous forest, including sugar pine, doulgas fir, knobcone pine) - F018XA203CA
... CX018XA203 – Mesic Volcano Cones
ii.
Site not as above
a.
Soils are very shallow to shallow - support open blue oak with annual herbaceous communities
... R018XA104CA – Shallow Mesic Volcanic Ridges
b.
Soils are moderately deep to deep - support closed oak woodland with scattered pine.
... F018XA202CA – Deep Mesic Mountain Slopes & Summits
B.
Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
1
Geology is dominated by granitoid almost exclusively. Break between Valley (MLRA 17) and the foothills abrupt, with steep slopes occuring from the lowest foothills to the MLRA 18/22A break.
i.
Subhumid climate. Soil moisture regime is xeric and only aridic at the lowest elevations (usually in conjunction with the valley). (LRU C)
a.
Soil chemistry a key factor in defining site- ultramafic soils with reduced productivity
... R018XC106CA – Thermic Ultramafic Foothills
b.
Soil chemistry a lesser contributing factor
1)
Mean Annual Precipitation (MAP) < 23 "
a)
Soils have shrink-swell properties and clayey PSC
(1)
Slope percent < 25, on terraces and low hills
... R018XC101CA – Thermic Clayey Terraces and Hills
(2)
Slope percent ≥ 25, on upper foothills and mountains
... R018XC102CA – Steep Thermic Clayey Shallow
b)
Site not as above
(1)
Soils shallow depth class
(a)
Soils occuring on lower foothill position, slope < 25%
... R018XC103CA – Lithic Thermic Foothills
(b)
Soils occuring on steep slopes (≥ 25%), with rock outcrop area > 25%
... R018XC104CA – Thermic Free Face Foothills
2)
MAP ≥ 23
a)
MAP ≥ 30
(1)
Site occurs in shallow to moderately deep soils
(a)
Soils on granite and support dense chaparral - R018XC107CA
... R018XC107CA – Thermic Granitic Foothills south-facing
(b)
Soils on other parent materials
(1)
Soils are on marble, often on canyon walls, yucca-chamise associations are common - R018XC109CA
... R018XC109CA – Steep Marble Canyon Walls
(2)
Site occurs in deep to very deep soils on concave positions
(a)
Site occurs in steep narrow drainages , often metamorphic PM, dominated by California buckeye and mesic chaparral shrubs (Mahogany, flannelbush) - R018XC110CA
... R018XC110CA – Cool Thermic Shallowly Dissected Slopes
(b)
Site occurs on broadly concave mountain slopes, generally in granite PM, closed canopy (interior/canyon live oak) and buckeye, often with California bay. - F018XC203CA
... F018XC203CA – Cool Thermic Slopes
b)
MAP < 30 inches
(1)
Soils occur on south to southwest aspects, shallow to moderately deep soils- chaparral
... R018XC107CA – Thermic Granitic Foothills south-facing
(2)
Site ocurs on all aspects, generally on moderately deep to very deep soils. Vegetation consists of blue oak woodland and savannas - F018XC201CA
... F018XC201CA – Thermic Granitic Foothills
ii.
Semi-arid climate with interchanging soil moisture regimes (xeric & aridic). Moderately to steep hills & mountains at southern end of Great Central Valley.
a.
Mean elevation > 3,200 ft (soil temperature regime thermic to mesic). This LRU occurs at the crossroads of several MLRA's. Vegetation patterns reflect the confluence of desert (MLRA 29), mountains (MLRA 22A), and foothills (MLRA 18) vegetation, to include juniper/ blue oak woodlands, yucca and other species from adjacent regions. (MLRA 22AO)
b.
Mean elevation < 3,200 ft (Vegetation patterns conform to vegetation classes and ecosystem dynamics of other LRU's in MLRA 18 with annual grasslands/ blue oak savannahs being most common plant community.) (LRU E)
1)
Riparian (driven by hydrological features) - R018XX999CA
2)
Site is an upland
a)
Soil temperature regime is solidly thermic and landform is hills or terraces
(1)
Soils are calcareous and very deep, pH ranges into alkaline (> 8 pH) - R018XE101CA
... R018XE101CA – Very Deep Alkaline Alluvium
(2)
Soils not as above
(a)
Soils have heavy texture or exhibit cracks with seasonal wetting-drying cycles - R018XE102CA
... R018XE102CA – Steep Clayey Shallow
(b)
Site not as above
(1)
Soils are shallow (AWC 1-2 inches); vegetation is annual forbs/grasses with very few trees - R018XE103CA
... R018XE103CA – Loamy Low Hills
(2)
Soils are moderately deep to deep (AWC 3-5 inches), often with mollic epipedons; vegetation includes oak woodland with dense annuals. - R018XE104CA
... R018XE104CA – Thermic Granitic Hills
b)
Soil temperature regime is borderline mesic and landform is hills or mountains (buckeye, foothill pine, and interior live oak indicator species) -F018XE201
... F018XE201CA – Granitic Hills and Mountains
2
Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
i.
Site occurs on ultramafic soils
a.
Site with very low Ca:Mg ratios ( 0.5) indicated by greater cover of barren soil/rock
... R018XI102CA – Thermic Ultramafic Foothills Extremely High Magnesium Content (Ca:Mg Ratio Less Than 0.5)
b.
Site not as above
1)
Sites with Ca:Mg ratios greater than 0.5 (but rarely than 2.0) continuous vegetation with only minor breaks
... R018XI103CA – Thermic Ultramafic Foothills Moderately High Magnesium Content (Ca:Mg Ratio 0.5 To 2)
2)
Sites on north-facing slopes greater in shrub diversity
... R018XI104CA – Thermic Ultramafic North-Facing Steep Slopes
ii.
Site not as above
a.
Site occuring on lava plateaus or erosion remnants, and skirting the adjacent hillslopes
1)
Soils very shallow to shallow (annual forbs & grasses)
... R018XI101CA – Shallow Latite Ridgetops
2)
Soils moderately to very deep (oak/shrub savannahs)
... F018XI207CA – Deep Volcanic Plateaus and Hills
b.
Site occurs on a hill or hillslope (various geologies)
1)
Mean Annual Precipitation (MAP) is generally well below 18 inches
a)
Sites consist of ridges and or terraces or alluvial fan remnants
(1)
Sites occurring on shallow to moderately deep soils, sometimes rocky
(a)
Soils are shallow (often over tuffaceous parent materials)
... R018XI163CA – Thermic Low Rolling Hills
(2)
Sites occur on deeper soils located on backslopes to footslopes
... F018XI208CA – Deep Low Rolling Hills and Terraces
b)
Sites are low, rolling dissected erosional surfaces, concave and accumulation of fine particles
... R018XI164CA – Clayey Dissected Swales
2)
MAP is at least 18 inches
a)
MAP ≤ 25 inches
(1)
Concave-Concave microsite positions - generally dominated by Juncus-Carex and annual forbs
... R018XI111CA – Low Gradient, Concave Depressions
(2)
Site on upland, bedrock controlled
(a)
Shallow to moderately deep soils, parent material derived from metavolcanic, slate, or granitic lithologies.
... F018XI200CA – Low Elevation Foothills
(b)
Soils towards shallow end and very low AWC (< 2)- volcanic PM
... R018XI107CA – Shallow, Undulating Volcanic Hills
b)
MAP > 25 inches
(1)
Site is steep AND aspect dependent, generally occuring on north-facing slopes on lower elevations, and on reverse aspects (s-facing) as elevation increases
(a)
Site approaching mesic STR but still thermic, generally annual ppt > 34
... R018XI105CA – Mesic Steep Convex Slopes bordering thermic
(b)
Site definitely thermic STR, ppt < 34
(1)
Slope exceed 55 %, often occuring on canyon walls, herbaceous plants are diverse and dominate the site
... R018XI125CA – Very Steep Skeletal Hillslopes
(2)
Slopes less than 55 %, chamise and other chaparral shrubs dominate site, generally thick. Very low cover of forbs and grasses
... R018XI106CA – Steep Thermic Hillslopes and Canyon Walls
(2)
Not as above
(a)
Site in thermic soil temperature regime
(1)
PM intrusive igneous, excluding footslope and toeslope positions (depositional areas)
(a)
South to west-facing aspects, usually chamise dominated - R018XI106CA
... R018XI106CA – Steep Thermic Hillslopes and Canyon Walls
(2)
Site not as above
(a)
Trees and vegetation stunted due to high Ca content (PM ~ marble)
... F018XI206CA – Clayey Thermic Marble Hills
(b)
Site not as above
(1)
Site dominated by volcanic bedrock
(a)
Soil depth shallow (Inks, Pentz, Amador soils) annuals dominate the site, AWC 1-4 - R018XI107CA
... R018XI107CA – Shallow, Undulating Volcanic Hills
(b)
Soil depth deep to deeper, oak woodland or savannah, AWC 3-7 - F018XI207CA
... F018XI207CA – Deep Volcanic Plateaus and Hills
(2)
Site not as above
(a)
Site occurs on moderately deep soils on slopes generally < 30%- blue oak, foothill pine, annual grasses, moderate density of shrubs.
... F018XI201CA – Moderately Deep Thermic Foothills
(b)
Soils are generally deeper, live oak dominated and dense overstory - F018XI202CA
... F018XI202CA – Deep Thermic Steep Hillslopes
(b)
Site in a mesic STR
(1)
Site on sideslopes and often steeper and/or north-facing (California black oak dominant tree and high density of shrubs and a few conifers)
... F018XI204CA – North-facing Steep Draws and Hillslopes
(2)
Site occurs along edges of MLRA 22A break, mesic STR more common
(a)
Site generally shallow occuring on narrow ridges or sideslopes below prominent ridges, vegetation consists of annuals forbs and grasses and scattered shrubs/foohtill pine - R022AI101CA
(b)
Site not as above, slope gradient generally steep
(1)
Soils shallow to moderately deep (rarely deep) on S-facing slopes. Vegetation consists of chaparral shrubs - R018XI105CA
... R018XI105CA – Mesic Steep Convex Slopes bordering thermic
(2)
Soils generally deeper and occur on all aspects, PIPO-oak-shrubland - F022AI201CA
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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