Fisherman on the middle Columbia River

Stream flow in the middle Columbia River region

Collaboration improves water quantity

The mid-Columbia tributaries that steelhead love to call home often have critically low flows in summer and fall, due to water diversions for agriculture. Partners in the basin have made huge strides forward to protect in-stream flows in key steelhead streams by improving water and land management, purchasing and leasing water rights, and finding alternate water sources for farmers.

Flows in the Yakima River and its major tributaries are managed as part of the Bureau of Reclamation’s Yakima Project. During  the past 30 years, irrigators and the Bureau have made significant improvements in how river flows are managed. Major new improvements are planned as part of the Yakima Basin Integrated Plan.

Indicator data

Water Quantity


water quantity (click >> to open legend)

Visit How we measure for background about this data, and our Salmon Data Portal for original source data behind the indicator charts and graphs used throughout this site.