Projects
French Gulch Fish Passage
A Big Hole Conservation Fund Project
1% for the River
Impairment: Complete fish barrier due to historic mining practices and sedimentation from nearby eroding banks.
Proposal: Construct step-pool passage for native fish to the upper reaches of the French Creek drainage. Restore eroding stream banks.
Benefits: Improved native trout fishery by restoring fish passage to 1.7 miles of previously inaccessible stream; decreased sedimentation
Calendar:Â Construction 2022
Estimated Cost: $219,832.00
Big Hole Conservation Fund Goal: $20,000
DONATE TO SUPPORT THE FRENCH GULCH FISH PASSAGE PROJECT
Project Description
In partnership with the Deer Lodge Valley Conservation District (DLVCD) and Montana Fish, Wildlife and Parks (MFWP), we are working to restore fish passage and stream connectivity to 1.7 miles of pristine stream that is currently devoid of fish in the upper reaches of French Gulch, a headwater tributary of the Big Hole River.
This project will address a major stream impairment and is part of a suite of projects in the French Creek watershed to address basin-wide water quality, habitat issues, and native fishery restoration. The primary goal of the project is to provide passage for native fish to the upper reaches of the French Creek drainage. This requires replacing the existing cascade and culvert barrier with a sinuous, step-pool system. Another goal is restoration of two eroding streambanks downstream of the cascade through revegetation and application of bioengineering techniques using both hand crews and heavy equipment.
The fish barrier on French Gulch was created by historic placer mining activities that took place from the 1860s to the 1930s). Placer mining was an extremely destructive practice, and while there has been little mining activity in the area in the last 100 years, impacts from historic mining are still evident on the landscape. In French Gulch, the valley floor was extensively mined from one side to the other, effectively lowering its elevation by about 30 ft. The stream was moved to the west side of the valley and trapped there by the careful placement of a nearly vertical boulder-wall known as the Chinese Wall. At the head of this wall, the stream drops off in a steep cascade of water to the elevation of the old mining area. This cascade is so steep (and lacks pool habitat) that it effectively prevents upstream fish passage. The cascade is blocking access to about 1.7 miles of habitat to native species including Westslope Cutthroat trout and Arctic grayling. Access to critical, cold-water refugia and spawning habitat such as those available in the headwaters of French Gulch is important for the survival of these sensitive native fish.
Results
Results will be published once they become available.
People and Organizations Involved
Deer Lodge Valley Conservation District (DLVCD)
Montana Fish, Wildlife, and Parks
Project Documents
Project Photos




Project MAP
Status
In Design
Type
Native Fish