Watershed Management Plan Documents
The Watershed Management Plan was developed to ensure that future management of water resources of the Chehalis Basin remains in the hands of its residents to the greatest extent possible. Through this planning process, the local citizenry shared issues and concerns related to water resource management and has worked with utilities and local governmental entities to develop the plan.
Streamflow Restoration Plan / Watershed Plan Addendum
The Chehalis Basin Partnership took on developing a Streamflow Restoration Plan starting in 2018. More information about the legal basis for this work can be found here. A YouTube video about watershed planning in the Nisqually watershed, found here, describes the need for this work in a clear way that applies equally to the Chehalis.
The Chehalis Basin Partnership’s concensus-approved plan is available below:
Addendum to the Chehalis Basin Watershed Management Plan: Chehalis Watershed (WRIA 22/23) Response to the 2018 Streamflow Restoration Law. November 17, 2020.
SEPA Environmental Checklist – SEPA comments due to Grays Harbor County, October 15, 2020 by 4:30 p.m.
Watershed Management Plan
Watershed Management Plan – Main Document
Supplement Documents – Table of Contents
Supplement 1 – Introduction
Supplement 2 – Why Does the Plan Exist?
Supplement 3 – Basin Description
Supplement 4 – Issue Papers – Table of Contents
Instream Flows; (combined document with above and below issues)
Water Quality Impairment; and Protection of Existing Areas With High Quality Waters
Total Maximum Daily Loads (TMDLs);
Land Use; Agriculture and Water Management ;
Water Conservation Use/Efficiency;
Supplement 5 – Implementation Strategy
Supplement 6 – SEPA Compliance and Watershed Planning
Supplement 7 – Glossary of Terms
Intergovernmental Agreement – 1998
Background Document: Chehalis Basin Level 1 Assessment. Envirovision. 2000
Detailed Implementation Plan
Watershed Planning Studies (pre-2005)
The following studies were produced to help with the Phase 1 and Phase 2 of the Watershed Planning process
Detailed Summary of the Chehalis Basin Level Assessment. Produced by:Tetra Tech/KCM Inc., in association with Triangle Associates. March, 2002.
2003 Chehalis Basin Water Quantity Evaluation. Tetra Tech/KCM Inc. Oct. 2003
Supplement to the Chehalis Basin Level 1 Assessment: Documentation of Existing Water Quality Conditions, Monitoring Activities, and TMDL’s. Tetra Tech/KCM Inc., in association with Triangle Associates. June 2003.
Fecal Coliform Monitoring in Grays Harbor County: Summary Report of Monitoring Results for 2000-2003. Tetra Tech/KCM Inc., in association with Triangle Associates. June 2003
Chehalis Watershed Monitoring Plan and Quality Assurance Project Plan Framework. Tetra Tech/KCM Inc., in association with Triangle Associates. Dec. 2003.
2002 Chehalis Basin Instream Flow Study . Tetra Tech/KCM Inc., in association with Triangle Associates. Dec 2003.
Municipal Water System Inchoate Water Rights Analysis Project. Lee Daneker. Dec 2006.
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Available for download here are the key Watershed Management Plan documents:
The Watershed Management Plan provides the vision of the Chehalis Basin Partnership (as of 2004) on goals and objectives for water management in the Chehalis Basin. The Plan examines water quality, water quantity, instream flow and habitat.
The Detailed Implementation Plan outlines strategies and concrete actions the group can take towards implementing the Watershed Management Plan.
Streamflow Restoration Plan documents represent the most current (2018-2020) planning effort by the Chehalis Basin Partnership.
Full plans can be downloaded from the links to the left.