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Inland Maritime Foothills and Valleys

Ecoregion in WA, ID

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The Inland Maritime Foothills and Valleys ecoregion includes the moist, lower valleys of the Pend Oreille and Priest rivers which are wide, glaciated, and contain broad floodplains that are interspersed with areas of low hills. These river valleys contrast with the dry Columbia, Kettle, and San Poil valleys of the Okanogan-Colville Xeric Valleys and Foothills (15r) to the west. The Inland Maritime Foothills And Valleys ecoregion has higher precipitation, more ash in its soils, more water holding capacity in its soils, and a more maritime-influenced climate than Ecoregion 15r. Vegetation is western hemlock, western redcedar, and white pine with paper birch, quaking aspen, and black cottonwood in floodplains and along shorelines. It contrasts with the dry forest communities of Ecoregion 15r.

— EPA

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