Complete information on tourist attractions and parks for Moses Lake, Washington, including popular family and vacation destinations and state and local parks and recreation areas. Moses Lake is a lake and reservoir along the course of Crab Creek, in Washington state, USA. Moses Lake is part of the Columbia River basin, as Crab Creek is a tributary of the Columbia River. Although originally a shallow natural lake, Moses Lake was dammed in the early 20th century for irrigation purposes. The Moses Lake Municipal Code is current through Ordinance 2942, passed November 26, 2019. Disclaimer: The city clerk has the official version of the Moses Lake Municipal Code. Users should contact the city clerk for ordinances passed subsequent to the ordinance cited above.