The improvements proposed as part of the Project aim to restore permanent access to the District’s Rice Canyon Reservoir, while protecting the existing 16-inch water pipeline and the proposed electrical conduit from future flooding and vehicle traffic. The proposed Project includes the following components: (1) replace the existing electrical conduit; (2) replace the three existing concrete low water crossings; (3) clear vegetation, regrade and compact the access road, and construct earthen drainage swales along the road in areas where natural ditches have already formed; (4) perform reservoir rehabilitation repairs; and (5) ongoing maintenance of roadway to keep clear for access. All Project-related activities are planned and designed to stay within the proposed Project footprint.
Existing onsite crossings will be replaced with two new concrete low-flow crossings (Crossing A+B and Crossing C) that total approximately 0.2-acre in surface area (9,036 square feet). Existing Crossings A and B will be combined into one stretch of concrete (“Crossing A+B”) that is 487 feet long and 12 feet wide. Existing Crossing C will be replaced with a new low flow Crossing C that is 266 feet long and 12 feet wide. Each creek crossing will have upstream and downstream underground sloped cut-off walls that cover an additional subsurface footprint of 0.2-acre. At Crossing C, Class V grouted riprap is proposed to provide slope stabilization. Additional riprap is required on the west side of Crossing A+B and midway down the access road to dissipate water velocity from the hillside and help reduce potential erosion to the roadway.
Road repairs consist of grading and earthen drainage swales along the road in areas where natural ditches have already formed. EVMWD proposes yearly maintenance to the access road as needed to maintain vehicular access to the reservoir.
The Project will include essential anti-corrosion repairs (i.e., cathodic protection system), structural retrofit, safety improvements, and recoating to the interior and exterior of the Rice Canyon Reservoir.
Project construction is expected to commence in 2024 and will be broken down in two phases: the first phase consisting of the conduit and road repairs lasting approximately three months and the second phase consisting of the reservoir rehabilitation lasting another 9-12 months.