Chelan County PUD Rocky Reach Dam

The Draft National Pollutant Discharge Elimination System (NPDES) Modified Permit No. WA0991033 for Rocky Reach Dam is being issued to Chelan County PUD No.1. The permit authorizes the discharge of non-contact cooling water from outfalls 001-021 to the Columbia River.

You can view the documents at Chelan County PUD Rocky Reach or visit the Water Quality Permitting and Reporting Information System (PARIS) website.

We regulate wastewater released from municipalities and industries using the National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit. This permit regulates wastewater that goes directly into lakes, rivers, Puget Sound, or the ocean (surface water). All wastewater must be treated before it goes into surface water to protect human health and aquatic life. Learn more about water quality individual permits.