Moses Lake Invasive Aquatic &
Riparian Vegetation Control Projects
Moses Lake is a 6,800 acre (surface area) water body with approximately 120 miles of shoreline, and is located in Grant County, Washington. At a water surface elevation of 1,047 feet, the depth ranges from 2 to 35 feet deep. Moses Lake’s water shed is inclusive of portions of Lincoln, Adams, Grant, and Spokane Counties and receives perennial flow from Crab Creek and Rocky Ford Creek. Rocky Ford Creek contributes substantial flow but is a spring-fed stream with a very small surface drainage area.
The Moses Lake Irrigation and Rehabilitation District (MLIRD) has the responsibility to maintain and enhance the water quality and usability of this fresh water reservoir. In 2008, the MLIRD conducted a lake-wide survey to map the characteristics of the lake including vegetation diversity and density, sediment types, and depths. In 2009, the MLIRD created an Integrated Aquatic Vegetation Management Plan in order to define the survey data and discuss current and proposed management techniques, including chemical control.
In 2010, the decision was made to implement a three (3) year aquatic herbicide control project, the first year of which consisted of approximately 330 acres.
During a multi-agency meeting with the MLIRD, Grant County Noxious Weed Control Board, and the Washington Department of Natural Resources, it was agreed that a separate herbicide control project for the shoreline plants would be implemented immediately after the aquatic treatment.
Project Goals – Aquatic Project
The goals of this three (3) year project are to:
Want to learn more about invasive plants? Click here to visit our FAQ!
2014 Treatment Plan
2014 Treatment Map
The Moses Lake Aquatic
on June 23rd
and was completed
on June 25th.
will be lifted
on Saturday, June 28th
*Algaecide treatments will occur on an as needed basis.