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Sub-Irrigated High Valleys

Ecoregion in Rocky Mountains in WY, UT, ID

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The Wet Valleys ecoregion is characterized by wetlands, lakes, canals, cold winters, and a short growing season. Nearly flat, poorly- drained floodplains and low terraces are widespread and support sedges, rushes, cattails, marsh grasses, annual bluegrass, and clover. Well-drained alluvial fans and foothills covered in sagebrush grassland act as a transition to the surrounding and much more rugged Partly Forested Mountains (17o), Semiarid Bear Hills (18d), and Semiarid Foothills (19f). Mollisols occur and have a frigid temperature regime. Land use is irrigated hayland, meadow pastureland, and rangeland. Land use and drainage conditions are all different from neighboring ecoregions.

— EPA

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Ecoregion