Modified fish ladders working, Grant PUD says

Wanapum Dam

Modifications to the Wanapum and Rock Island Dam fish ladders appear to be successful, according to initial results reported by the Grant County Public Utilities District.

Modifications to the fish ladders was made necessary after Grant PUD discovered a crack in Wanapum Dam's pier monolith No. 4 in February, prompting a drawdown of the waters behind the structure.

The utility now said direct observation studies have shown adult fish navigating the modified ladder and passing upstream, with recent counts showing 31 spring chinook and 102 steelhead successfully exiting the Wanapum Dam left bank fish ladder. Meanwhile, three steelhead and eight whitefish have passed Rock Island Dam's ladders, which are located 36 miles upstream from Wanapum.

Biologists will also place passive integrated transponder (PIT) and acoustic tags on 250 adult spring chinook salmon from the hatchery program at Priest Rapids Dam before releasing them below Wanapum, allowing researchers to better confirm the effectiveness of the system.

"Both hydroelectric facilities have safely passed fish for more than 50 years and believe these early results are an indication of what will likely be another successful passage season," Grant PUD said.

The utility said it has been working with representatives from the Confederated Tribes of the Colville Reservation, Yakima Nation, Confederated Tribes of the Umatilla, Wanapum Band of Priest Rapids, NOAA Fisheries, Washington Department of Fish and Wildlife, U.S. Fish and Wildlife Service, and Chelan Public Utility District to coordinate its fish passage program since the problem at Wanapum was identified.

Did You Like this Article? Get All the Energy Industry News Delivered to Your Inbox

Subscribe to an email newsletter today at no cost and receive the latest news and information.

 Subscribe Now


The Time is Right for Optimum Reliability: Capital-Intensive Industries and Asset Performance Management

Imagine a plant that is no longer at risk of a random shutdown. Imagine not worrying about losing...

Going Digital: The New Normal in Oil & Gas

In this whitepaper you will learn how Keystone Engineering, ONGC, and Saipem are using software t...

Maximizing Operational Excellence

In a recent survey conducted by PennEnergy Research, 70% of surveyed energy industry professional...

Leveraging the Power of Information in the Energy Industry

Information Governance is about more than compliance. It’s about using your information to drive ...

Latest PennEnergy Jobs

PennEnergy Oil & Gas Jobs