Watershed Management photo identifier

Watershed Management

Methow - WRIA 48

This page is being maintained as an archive of past information and will not be updated.

link to WRIA 49 link to WRIA 49 link to WRIA 04 link to WRIA 47 link to WRIA 50 link to all WRIAs WRIA 48, Methow














Grant funds expended and/or projected through June 2015



In 2000, the state legislature provided additional funding for the Planning Unit to establish a baseline hydrologic assessment, including a groundwater study and model, development of a USGS watershed model, and completion of a water quantity assessment. Golder Associates and the USGS calibrated and collected data from 23 stream gauges, modeling groundwater and surface water in the watershed, and conducted a sub-basin specific detailed groundwater study. Information gathered during these efforts is available from the final Phase 2 Level 1 assessment.

The Okanogan County Commissioners adopted the Methow Watershed Plan in June 2005. Plan recommendations included:

  • Added clarity and information to support an amendment to the existing instream flow rule.
  • Aquifer storage projects.
  • Protection for ground water recharge from unlined irrigation ditches.
  • Mechanisms to reduce relinquishment of water rights.

Phase 4 work began in November 2008. Phase 4 Year-1 tasks include developing a detailed implementation plan, and completing several obligations identified in the watershed plan.

Instream flow status

Instream flows were set in 1976  (Chapter 173-548 WAC). The planning group (Methow Watershed council) and Ecology have agreed to revisit the rule after gaining new information and clarifying specific rule changes to be proposed.


Link to other resources, studies, data


Please send additions or corrections to Chris Anderson, (360) 407-6634.

Methow River at Winthrop




Plan Website - Methow Watershed Council

WRIA 48 Status

  • Optional elements: water quality, habitat.
  • Currently in Phase 4: Implementation.