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The Spokane Valley–Rathdrum Prairie Aquifer is one of the fastest and most productive aquifers in the country. The volume of the aquifer is about ten trillion gallons (38 trillion liters) of water. [2] It supplies water to over 500,000 people in the Spokane region, producing an average of 146 million gallons of water each day.
Soil in the Ruston/North Tacoma study area is contaminated by arsenic and lead. Soil, surface water and groundwater across most of the Tacoma Tar Pits site is contaminated by metals, PAHs, PCBs, and VOCs including benzene, from a former coal gasification plant and recycling operations. Ship building, oil refining, chemical manufacture and ...
Spokane Valley, Washington – Racial and ethnic composition Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race. Race / Ethnicity (NH = Non-Hispanic) Pop 2010 [27] Pop 2020 [28] % 2010 % 2020 White ...
Valley population grew from 1,000 residents in 1900 to nearly 10,000 by 1922. Extensive apple orchards thrived in the gravelly soil of the Valley, and by 1912 nearly 2 million apple trees had been planted. A huge packing plant was built in 1911 by the Spokane Valley Growers Union. The Spokane Valley was developed as townships.
Although the peaks of the North Cascades do not reach great elevations (high peaks are generally in the 2,100 to 2,400 m (7,000 to 8,000 ft) range, their overall relief, the relatively uninterrupted vertical distance from valley bottom to mountain top, is commonly 1,200 to 1,800 m (4,000 to 6,000 ft). [12]
In soil science, agriculture and gardening, hardpan or soil pan is a dense layer of soil, usually found below the uppermost topsoil layer. [1] There are different types of hardpan, all sharing the general characteristic of being a distinct soil layer that is largely impervious to water. Some hardpans are formed by deposits in the soil that fuse ...