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Ecology provides the high-quality science that is the foundation of Washington state environmental policy. Our monitoring, assessment, and modeling services provide a data-rich understanding of our state’s land, air, and water. We provide access to that data through reports, databases, maps and user-friendly online tools.

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ROD ROD BENT 17-03 July 17 2018

A Report of Decision from the Benton County Water Conservancy Board

https://ecology.wa.gov/rod-rod-bent-17-03-july-17-2018

MOU

Memorandum of Understanding (MOU) between U.S. Bureau of Reclamation and Ecology signed in 2022.

https://ecology.wa.gov/mou

Rulemaking Emergency Adoption Notice (WAC 173-167) 07/28/2021

This is an emergency rulemaking adoption (CR-103E) for WAC 173-167 Emergency Drought Funding.

https://ecology.wa.gov/rulemaking-adoption-notice-wac-173-167-07-28-202

Proposed rule language (WAC 173-501) 11/19/2019

This is proposed rule language for WAC 173-501 Instream Resources Protection Program - Nooksack Water Resource Inventory Area (WRIA) 1

https://ecology.wa.gov/proposed-rule-language-173-501

Proposed rulemaking (WAC 173-566) 01/17/2019

This is the proposed rulemaking announcement (CR-102) Chapter 173-566 Streamflow Restoration Funding

https://ecology.wa.gov/rule-language-wac173-566

Preliminary draft language (WAC 173-166) 09/01/17

This is Preliminary draft language for WAC 173-166 Emergency Drought Relief

https://ecology.wa.gov/preliminary-draft-language-173-166-wac-09-01-17

Proposed rulemaking (WAC 173-501) 11/19/2019

This is the proposed rulemaking announcement (CR-102) Chapter 173-501 Instream Resources Protection Program - Nooksack Water Resource Inventory Area (WRIA) 1

https://ecology.wa.gov/proposed-rulemaking-cr-102-wac-173-501

Rulemaking Adoption Notice (WAC 173-501) 05/27/2020

Rulemaking Adoption Notice (WAC 173-501) Instream Resources Protection Program - Nooksack Water Resource Inventory Area (WRIA) 1

https://ecology.wa.gov/rulemaking-adoption-notice-wac-173-501-05-27-202

Rulemaking Adoption Notice (WAC 173-166) 04/11/2018)

This is a rulemaking adoption (CR-103) for WAC 173-166 Emergency Drought Relief

https://ecology.wa.gov/rulemaking-order-wac-173-166-04-11-2018

Order on Petition for Declaratory Judgment (WAC 173-557; 173-555) 01/27/15

Order on Petition for Declaratory Judgment Regarding the Validity of an Agency Rule, and Petition for Judicial Review of Agency Action Denying Petition to Amend Agency Rule regarding rulemaking for WAC 173-557 and 173-555 Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer and amendment to WAC 173-555-010.

https://ecology.wa.gov/order-on-petition-for-declaratory-judgment-wac-1

Petition for Declaratory Judgment and Judicial Review (WAC 173-557; 173-555) 01/27/15

Petition for Declaratory Judgment and Judicial Review for Chapter 173-557 WAC Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer and amendment to WAC 173-555-010 rulemaking.

https://ecology.wa.gov/petition-for-declaratory-judgment-and-judicial-rev

Petition to Amend the Instream Flow Rule(WAC 173-557; 173-555) 01/27/15

Petition to Amend the Instream Flow Rule for the Spokane River & Spokane Valley Rathdrum Prairie (SVRP) Aquifer, WAC 173-557 Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer and amendment to WAC 173-555-010.

https://ecology.wa.gov/petition-to-amend-the-instream-flow-rule-wac-173

Rulemaking Adoption Notice (WAC 173-557) 01/27/15

This is a rulemaking adoption (CR-103) for WAC 173-557 Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer and amendment to WAC 173-555-010

https://ecology.wa.gov/rulemaking-adoption-notice-wac-173-557-01-27-15

Lower Spokane River Redband Trout Spawning Habitat (WAC 173-557; 173-555) 01/27/15

Lower Spokane River Redband Trout Spawning Habitat: Monroe Street Dam to Nine Mile Dam Pool, Spokane River Hydroelectric Project, FERC Project No. 2545, Dr. R. Craig Addley and Mr. N. Phil Peterson, February 2011 WAC 173-557; 173-555 Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer and amendment to WAC 173-555-010.

https://ecology.wa.gov/lower-spokane-river-redband-trout-spawning-habitat

Plate 1 - Location and hydrogeologic unit (WAC 173-557; 173-555) 01/27/15

Plate 1 - Location and hydrogeologic unit of project wells in the Spokane Valley–Rathdrum Prairie aquifer study area WAC 173-557; 173-555 Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer and amendment to WAC 173-555-010.

https://ecology.wa.gov/plate-1-location-and-hydrogeologic-unit-wac-173

Plate 1 (WAC 173-557; 173-555) 01/27/15

Plate 1 - Ground- and surface-water measurement sites, Spokane Valley–Rathdrum Prairie Aquifer WAC 173-557; 173-555 Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer and amendment to WAC 173-555-010.

https://ecology.wa.gov/plate-1-wac-173-557;-173-555-01-27-15

Plate 2 - Map and hydrogeologic sections (WAC 173-557; 173-555) 01/27/15

• Plate 2 - Map and hydrogeologic sections showing location of wells, surficial geology, and hydrogeologic units WAC 173-557; 173-555 Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer and amendment to WAC 173-555-010.

https://ecology.wa.gov/plate-2-map-and-hydrogeologic-sections-wac-173

Plate 2 (WAC 173-557; 173-555) 01/27/15

Plate 2 - Simplified surficial geology, generalized hydrogeologic sections, and surface geophysical transects, Spokane Valley–Rathdrum Prairie Aquifer WAC 173-557; 173-555 Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer and amendment to WAC 173-555-010.

https://ecology.wa.gov/plate-2-wac-173-557;-173-555-01-27-15

Rainbow Trout Spawning Survey, (WAC 173-557; 173-555) 01/27/15

Rainbow Trout Spawning Survey, Spokane River Hydroelectric Project, FERC Project No. 2545, Parametrix, October 2003

https://ecology.wa.gov/rainbow-trout-spawning-survey-wac-173-557;-173-5

Rulemaking Adoption Notice (WAC 173-167) 12/11/24

This is the rulemaking adoption notice (CR-103) for Chapter 173-167 WAC (AO 24-04)

https://ecology.wa.gov/rulemaking-adoption-notice-wac-173-167-12-11-24