The creeks are located in Incline Village, Nevada near the shore of Lake Tahoe and across State Route 28 as well as multiple crossings upstream from the highway.
The project goal is to improve fish habitat, wildlife habitat, fish passage, channel stability, and water quality, all elements affected by past and current human activities in the Third Creek and Incline Creek watersheds. The specific project goals are:
- Restoration of hydraulic function to impacted areas
- Reduction of erosion rates of banks
- Improvement of stream-side and in-stream fish habitat in newly restored flood plain terraces, where geography permits it
- Improvement of fish habitat within the downstream reaches
- Improvement of fish passage through culverts
- General improvement of in-stream and lake water quality by reduction of fine sediment transport
- Enhancement of trail features with inclusion of interpretative signage while mitigating impacts associated with pedestrian damage to eroding banks
- Restoration of low-flow channels within and downstream of existing blockage features
Cardno served as the prime consultant to Incline Village General Improvement District over the six phases of the project in the restoration of degraded stream channel and culvert outfalls and in designing fish passage through the culverts under the highway, which provides for connectivity to additional fish habitat upstream. Culvert improvements created 1.5 miles of habitat, allowing fish to travel through the culverts, including to parts of the stream that had been inaccessible.
Our team designed three new pedestrian bridges at existing culvert crossings. Using biotechnical stabilization, this helped restore creek banks to its more natural state, provide for additional habitat, and slow sediment transport. Existing pond inlets and outlets were redesigned to allow fish passage, increase habitat, and provide better control of the pond level, helping to alleviate flooding issues by increasing flow capacity through the use of an open bottom channel.