DERBY DAM FISH SCREEN
Restoring watershed connectivity.
Construction of the Derby Dam Fish Screen will restore watershed connectivity and support fish movement along the Truckee River, promoting both the recovery of the federally threatened Lahontan Cutthroat Trout (LCT) as well as fishing and recreation opportunities in Nevada.
LOCATION:
Sparks, NV
PARTNERS:
Bureau of Reclamation, Farmers Conservation Alliance
ENGINEERING:
McMillen Jacobs Associates
CONSTRUCTION:
Granite Construction
INSTALLATION DATE:
Fall 2020
DERBY DAM FISH SCREEN
Almost 50 years after the Lahontan Cutthroat Trout was listed under the Endangered Species Act, a fish-friendly infrastructure project at Derby Dam will help decades-long efforts to bring back the legendary fish.
Fish passage at Derby Dam has been a priority conservation project for LCT recovery for more than two decades. In 2001, the U.S. Fish and Wildlife Service and Reclamation designed and completed a fish bypass around Derby Dam. Since then, the two agencies have been working to implement the protection portion of the Derby passage improvements. Reclamation selected the horizontal fish screen technology and entered into a cooperative agreement with Farmers Conservation Alliance for the design, construction, and commissioning of the screen. Construction of the Derby Dam Fish Screen (DDFS) Project began in October 2019 and will be complete in Fall 2020.
“This day is 100 years in the making. It’s a milestone for the history of reclamation. It’s about the balance we can find when we are willing to reinvest in our infrastructure…we’ve very proud of what everyone is working on.”
– LISTEN to BRENDA BURMAN
Bureau of Reclamation Commissioner, from the groundbreaking ceremony
History
One of the first Reclamation projects in the West.
The construction of the Derby Dam, completed in 1905, was the first project of the newly formed U.S. Reclamation Service (now Bureau of Reclamation) organized under the Reclamation Act of 1902. Lahontan Cutthroat Trout (LCT) in the Truckee Basin were once so numerous that a robust commercial fishery existed. After the completion of the Derby Dam in 1805, LCT lost access to their spawning habitat which eventually lead to their extirpation in the Truckee Basin.
Partnerships
A continued focus on collaboration.
The partnerships behind the Derby Project are the foundation for its collaborative approach. Innovative solutions have already helped to reduce risk, optimize schedules, adhere to timelines, cost-effectively manage the project budget, and create cutting edge solutions. One example of this includes Early Contractor Involvement with construction partner Granite, who was selected during the design phase of the project. Using this approach for the project has had value engineering benefits and strengthened the collaborative dynamic of the project between all partners.
LAHONTAN CUTTHROAT TROUT
Recovering a species.
In the 1970s an out-of-basin population was discovered on the border of Utah and Nevada in the Pilot Peak Mountains. Taxonomists at the time thought that it originated from the original Pyramid Lake population that was native to the Truckee Basin. Beginning in 1995, the Lahontan National Fish Hathery Complex (LNFHC) developed a conservation broodstock intended for use in the recovery efforts in the Truckee Basin system. Remarkably, Pilot Peak LCT were observed spawning in 2014, the first time natural reproduction of LCT has been documented in over 80 years.
“The fish screen that we are groundbreaking for today is innovative. It will protect the wild spawn trout in the truckee allowing them to move from derby dam to spawning habitat and back to pyramid lake each season. Naturally sustaining the lake population for the first time in 100 years.”
– LISTEN to Jody Holzworth
Deputy Regional Director, U.S. Fish and Wildlife Service, from the groundbreaking ceremony
PROJECT INNOVATIONS
Solutions that are cost-effective and efficient
How the Farmers Screen works.
The Farmers Screen, provided exclusively by Farmers Conservation Alliance (FCA), is a horizontal flat-plate screen upon which National Marine Fisheries Services established its horizontal fish screen criteria for the protection of anadromous salmonids.
The horizontally oriented fish screen is unique in this it will work with the diverted flow of water rather than against it, providing consistent fish protection by allowing fish and debris to move above and over the surface of the screen material.
Fish Screen Overview
Debris Flow Across Screen
“The fish screen that we are groundbreaking for today is innovative. It will protect the wild spawn trout in the truckee allowing them to move from derby dam to spawning habitat and back to pyramid lake each season. Naturally sustaining the lake population for the first time in 100 years.”
– LISTEN to Jody Holzworth
Deputy Regional Director, U.S. Fish and Wildlife Service, from the groundbreaking ceremony
Updates from the field.
Check back often for new updates throughout the project to hear from those working in the field and also to see milestone moments
Construction Timelapse
Water Release Timelapse
Groundbreaking
Technology that’s making a difference.
The completion of the Derby Dam Fish Screen will result in noticeable benefits not only for the Lahontan Cutthroat Trout but also for the Bureau of Reclamation:
-
DECREASED O&M COST -
FISH SAFETY ASSURED
(NMFS APPROVED) -
WIDE RANGE OF FLOW RATE (40-600 CFS) -
37 MILES FISH HABITAT REOPENED
media
In the News
Fish Screen Could Restore Lahontan Cutthroat Trout Habitat
ktvn.com
The Bureau of Reclamation is beginning construction on a fish screen at Derby Dam, intended to allow the movement of Lahontan Cutthroat Trout to move back and forth in the Truckee River.
