What causes earthquakes? Earth's crust ranges from 3 to 45 miles deep (5 to 70 kilometers). The crust is a thin, hard shell that floats on the denser, hotter rock of the mantle.
Sponsored Topics. Airway Heights is a city in Spokane County, Washington, United States, just west of Spokane. The population was 6,114 at the 2010 census. The city's name was taken from its close proximity to Fairchild Air Force Base and Spokane International Airport. Airway Heights was officially incorporated on June 28, 1955.
bonny slope 2.JPG. Long-term planning efforts for the 160-acre Bonny Slope West area of Washington County will kick into high gear in 2015. The public gets a chance January 26 to talk with county planners about what's ahead for the property, which before a unique land transfer was part of Multnomah County. (The Oregonian/2014).