Moses Lake is a city in Grant County , Washington , United States . The population was 20,366 as of the 2010 census . Moses Lake is the largest city in Grant County .
History This section does not cite any references or sources . Please help improve this section by adding citations to reliable sources . Unsourced material may be challenged and removed . This section may contain material not appropriate for Wikipedia . Please discuss this issue on the talk page . Before the construction of Grand Coulee Dam on the Columbia River in 1941 and Larson Air Base in 1942 the area was largely barren. Native Americans knew the area as Houaph, which meant willow. Chief Moses was leader of the Sinkiuse tribe from 1859 to 1899, and was forced to negotiate with white settlers who began to settle in the area in the 1880s. Under pressure from the government, Chief Moses traded the Columbia Basin land for a reservation that stretched from Lake Chelan north to the Canadian border. The government quickly realized that was a mistake and later traded again for what is now the Colville Tribes’ reservation.
