Moving Fish at Silver Creek - an update on the restoration at Silver Creek

Editor's note: The Kilpatrick Pond project is the largest enhancement project to take place at Silver Creek. The project is restoring the impounded section of the creek known as Kilpatrick Pond to address rising water temperatures and decades of sediment build up. Presently the pond contributes a significant amount of warm water into the system because of its large surface area. This affects over 15 miles of creek downstream. Every month we will post an update about the project on this blog.

About 1,000 fish were captured and safely returned to the Silver Creek system after water was diverted from the Purdy side of the Kilpatrick Pond as part of the restoration. The moving of the fish was made possible by volunteers and staff from the Idaho Fish and Game, Trout Unlimited and The Nature Conservancy.

Want to learn more? Read these first hand accounts about the move from Trout Unlimited's Chad Chorney and the Conservancy's Art Talsma:

The rescue went well. We probably took out 1,000 to 1,200 fish. Some water and fish remain around the “horseshoe” but I think we were able to get at the majority of the fish.  I’ll be checking the condition of any remaining fish periodically. Nick has agreed to add well water as necessary to ensure the fish survive until the site is re-watered. - Chad Chorney

We safely moved over 1,000 fish to Silver Creek so the restoration project can proceed on schedule and be successful. My estimate was 60% were Rainbows and 30% Browns and 10% others. The trout are free to move back upstream to the Preserve or go downstream. I observed fish moving upstream in the Kilpatrick pond by-pass within one hour of the fish rescue. Chad did an excellent job of organizing this event. Fish and Game crew were great to work with-- as always. - Art Talsma 

Learn more about the project and how you can contribute at the Kilpatrick Pond Project webpage.

Photo ©Rydell Welch

Photo ©Rydell Welch

Photo ©Rydell Welch

Photo ©Rydell Welch

UPDATE on the Kilpatrick Pond restoration project at Silver Creek

Editor's note: The Kilpatrick Pond project is the largest enhancement project to take place at Silver Creek. The project is restoring the impounded section of the creek, known as Kilpatrick Pond, to address rising water temperatures and decades of sediment build up. Presently the pond contributes a significant amount of warm water into the system because of its large surface area. This affects over 15 miles of creek downstream. Every month we will post an update about the project on this blog.

Learn more about the project and how you can contribute at: the Kilpatrick Pond Project webpage. 

By Dayna Gross, Silver Creek watershed conservation manager

We had a chance to get out on the dredge yesterday with Eric Anderson, the dredge owner, and Jake, the dredge operator. They are quickly approaching Kilpatrick bridge and it is anticipated that the dredging work will be done in the next couple of days. 
 
Once the dredge reaches the bridge, it will make its way back downstream, sloping the channel banks on its way, and then be removed by crane from the staging area (on Purdy’s property). 

The dredge is creating minimal turbidity in the water and fish are quickly moving into the deeper areas. Waterfowl and shorebirds are really enjoying the spoils which are being placed in an agricultural field north of the creek. 

Nick Purdy will start dropping the water level of the pond once the dredging is complete and construction on the lower pond will begin shortly thereafter.

TNC staff Lou Lunte and Dayna Gross. Photo ©TNC.

Lou surveying the project. Photo ©TNC.

Dredge near Kilpatrick Pond bridge. Photo ©TNC.

Electro-fishing

Recalling his first fishing trip to Silver Creek, Jack Hemingway wrote "I suspected there was something going on that I simply didn't understand"--a sentiment familiar to many anglers.

Spring creeks like Silver Creek are complex ecosystems. Even a careful observer can only hope to catch an incomplete glimpse of what's really happening.

That's why monitoring and research are such an important part of the Silver Creek conservation program. Spring creeks are not well studied. But at Silver Creek, a substantial monitoring program supplies biologists with a more complete picture.

From birds to vegetation, from water temperatures to flow rates, monitoring programs regularly assess the state of the creek.Beginning in 1997, the U.S. Geological Survey (USGS) has monitored fish populations in Silver Creek every three years.

This year, USGS biologists, with assistance from the Idaho Department of Fish & Game and Conservancy interns and volunteers, are electro-shocking sections of the creek to conduct their survey. Electro-shocking sends an electric current through the water which stuns any nearby fish. Volunteers net the fish, which are then delivered to live wells.

Fish species are recorded, and each fish is then weighed and measured, before being carefully released back to the stream. Anglers and conservationists are always very interested to know the ratio of rainbow trout to brown trout. There has been some evidence that brown trout, a Eurasian species, have slowly been taking over as the dominant species.

During Monday's electro-shocking, biologists were surprised at the large number of healthy rainbow trout. But it's far too early to guess what the monitoring studies will find.Trout aren't the only focus of this study; biologists also record the presence of dace, sculpin and the other small fish species that often escape notice. USGS biologists are also recording large invertebrates as part of the monitoring survey.

These smaller species are an integral part of the Silver Creek ecosystem--and serve as indicators as far as water quality and the overall health of the creek.

The electro-shocking will continue through July. In early autumn, the Conservancy will receive the results of this year's monitoring. We'll post the information here, so check back for the most current information on Silver Creek's fish.