Fifteenmile Watershed Projects
Wasco County Soil and Water Conservation District
Copyright (C) 2015 Wasco Co. SWCD All Rights Reserved
A watershed is the area of land that drains into a particular body of water such as a stream, river, lake, or bay.
The watershed includes not only the waterway itself, but also the entire land area that drains to it.
Water plays a vital role in Fifteenmile agriculture.The Fifteenmile Watershed is known for its dryland and irrigated crops, orchards, vineyards, livestock, pasture, and irrigated hayland. It is also known for it's ESA listed salmon/steelhead populations and other sensitive aquatic inhabitants. A fish kill on 15Mile in 2009 raised concerns about the future of irrigation in the watershed. High temperatures combined with low waterflows boded ill for both fish and irrigators. A way needed to be found to balance water rights with Endangered Species Act concerns.

This led to a conversation between the Fifteenmile Watershed Council, water regulators, Oregon Dept. of Fish and Wildlife, The Tribes, NOAA National Marine Fisheries, and the Freshwater Trust to work out ways to manage for all needs. The group explored monitoring, water rights, instream leasing options, off stream storage, dry year contingency plans, riparian improvements, and irrigation efficiency. The minutes from that meeting can be found at the link below. Presentations and relative documents have been archived. A list of the those documents can be found in the drop down menu titled "WS Project Archive" under "Watershed Projects" in the menu bar above. Please contact the the Watershed Coordinator for emailed copies.

Problem solving in the Fifteenmile Watershed

15Mile WS Monitoring Report 2012

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15Mile WS Projects
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15Mile Groundwater/SW Interaction Monitoring - J. LaMarche, OWRD
15Mile Groundwater Supplies - OWRD - May 2013 (pdf - 1.94mb)
Groundwater in the Fifteenmile Watershed
Oregon Water Resources presented information on groundwater in Fifteenmile that includes data from USGS that looks at the ground geological structure, withdrawals and recharge data.
15Mile ESA Workshop Minutes 2012
FAST Plan-May 2013
15Mile Off Stream Above Ground Water Storage Feasibility Study
One of the ideas explored to relieve pressure from Fifteenmile in the summer months was finding a way to store water during high flows and use it during low stream flows. To this end The 15Mile Watershed Council successfully applied for and was awarded an OWRD 1069 Water Conservation, Reuse & Storage grant.
Minutes - FAST Post Alert
Meeting July 2013
FAST - First Alert: ODFW - Actual vs Modeled Temperatures
Fifteenmile Flow Monitoring Project
The FAST Program is activated when temperatures and water flows create conditions detrimental to the survival of fish in Fifteenmile Creek. When models project these conditions, alerts are sent out to irrigators who then can voluntarily shut down irrigation until the danger has passed. Irrigators can also signup in advance for instream leasing during these critical periods under certain conditions and situations. Tatiana Taylor administers the program. She can be reached at 541-296-6178 ext 119, or emailed: for more information.
FAST Table
Led by the efforts of the Fifteenmile Watershed Council. local restoration groups, tribes, and state and federal agencies are taking a comprehensive and coooperative approach to tackling the recommended actions identified in the initial ESA planning documents. Watershed Council partners installed 5 new staff gages and are metering all significant irrigation diversions as part of its 15Mile Watershed Flow Monitoring Project. This will help to promote efficient and fair regulation of irrigation withdrawals and help paint a more complete picture of water movement throughout the watershed.
FAST - Fifteenmile Action to Stabilize Temperatures Project

15Mile WS Monitoring Assessment Meeting Dec 2014

15Mile (FAST) Draft Flow Plan Jan 2013

2015 PSP Results

Pesticide Stewardship Partnership
The PSP Program is an ongoing effort to monitor the presence of pesticides at sites in Mill, Threemile and Fifteenmile Creeks. The program monitors, identifies, collaborates to implement voluntary management practices, and provides follow-up monitoring to determine the effectiveness of management strategies. Latest results and more information can be found below.
FAST Outreach Flyer
15Mile Storage Feasibility Study - Minutes May 2014
15Mile Reservoir Supply Talk - LaMarche Sept 2014 (pdf - 682 kb)
15Mile Aboveground Storage Feasibility Study Results
Index and Executive Summary- 1.3 MB
1 - Introduction - 2 MB
2 - Hydrology - 1 MB
3 - Physical Feasibility - 14.4 MB
4 - Temperature Evaluation - 1 MB
5 - Regulatory Feasibility - 1.5 MB
6 - Conservation & Efficiency - 169 KB
7 - Economic Feasibility - 781 KB
8 - Environmental Impact - 653 KB
9 - Project Implementation - 167 KB
References and Appendices - 842 KB
Anderson Perry was awarded the contract to conduct the study in late fall 2016. Relative documents to the study are linked below. The council will be receiving an update at the 50% point - anticipated to be sometime in June 2017.
15Mile Underground Storage Feasibility Study
Middle Columbia River Steelhead Recovery Plan
15Mile Subbasin Plan
Fifteenmile Watershed Assessment
Site Map
Annual Tree Sale
Ed & Outreach
Resource Links
Soil Health
Urban Conservation

2016 PSP Results

FAST Update Presentation Sep 2017
15Mile Subsurface SFS GSI Presentation - June 2017
15Mile Subsurface SFS GSI Presentation - Sep 2017