Banner Cascade Pipeline Project Features
The Banner Cascade Pipeline Project has the following proposed features:
- Improved ability to convey treated water around the project area, and to be able to offer treated water to local residents who currently have a groundwater well supply. The project will install 8, 10 and 12-inch diameter treated water pipelines connecting with existing water mains concurrently with the larger raw water pipeline along various sections of the route to accomplish this goal.
- Fire hydrants will be provided along the treated water pipelines to improve fire protection for local residents.
- The design aims to maximize the amount of pipeline within roadways and to minimize the need to disrupt adjacent landscaping and tree removals.
- A 54-inch diameter raw water pipeline will connect to NID’s existing Cascade Canal Upper Bench Pipeline in order to replace the existing Clipper Creek Siphon. A 48-inch diameter pipeline will then continue to the Loma Rica treatment plant via Opalite Way, Wings of Morning Drive, Banner Lava Cap Road, Idaho-Maryland Road and Lee Lane. This construction trench will be approximately 8 feet deep and 6 feet wide. Due to the drop in elevation along the route, the pipeline will flow full under pressures up to 200 psi.
- At the Loma Rica facility, some raw water will be diverted for storage and treatment while the remainder will be conveyed to the Elizabeth George treatment plant via a 36-inch diameter pipeline routed along the northern boundary of the Nevada County Airport, turning north to Madrone Forest Drive, crossing Idaho-Maryland Road, following property boundaries connecting to Red Gate Road, continuing on Banner Lava Cap Road to connect with the Elizabeth George treatment plant. This construction trench is expected to be approximately 7 feet deep and 5 feet wide.
- A flow control structure at Opalite Way will be constructed to divert some flow to the Lower Cascade Canal and the Snow Mountain canal system.
- The existing Clipper Creek Siphon pipeline east of Opalite Way will be replaced as part of this project. The existing pipeline material is Techite which is nearing the end of its design life and has experienced some failures.
- The Upper Grass Valley Canal will be encased where it runs parallel to Banner Lava Cap Road, west of Old Wood Road for reliability and safety reasons.
- A feasibility study determining the economic and technical viability of a hydro-electric power plant to be located at the Loma Rica treatment plant has been completed. The design and construction for this hydro-electric station will be a separate project in the future.