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Watershed Planning photo identifier

Watershed Management

Nisqually - WRIA 11

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

link to WRIA 26 link to WRIA 23 link to WRIA 13 link to WRIA 12 link to WRIA 10 link to all WRIAs Map of WRIA 11, Nisqually









Grant funds expended and/or projected through June 2015



Pierce, Thurston, and Lewis counties adopted the Nisqually Watershed Plan in April 2004. The Nisqually Tribe was the lead agency and this was the first watershed plan adopted in the state. The Planning group began Phase 4 Implementation in November 2005. Key recommendations of the plan include sub-basin processing of water right applications, ongoing instream flow work in the Mashel basin and additional efforts in water conservation, reuse, and reclamation. A final Detailed Implementation Plan was completed in April 2007.

Instream flow status

Instream flows were set in 1981 (Chapter 173-511 WAC).

The planning group recommended maintaining existing closures, unless new technical information suggests otherwise. They also recommended retaining instream flow levels in the Nisqually River, but doing more work on the Mashel River to improve stream flows and to address water supply needs for the town of Eatonville.

In 2005, Ecology completed instream flow incremental methodology (IFIM) studies for Mashel River, which included:

  • Hydrographs/exceedance curves.
  • Estimates of allocated water and actual water use.
  • Summary of habitat conditions.
  • Assessment of hydraulic continuity.

Planning Document

Outside links, publications, studies, data

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

Nisqually River

Plan Website - Thurston County

WRIA 11 Status

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