R1E Concrete Reservoir
- Owner: Walnut Valley Water District
- Cost: $2,350,000
The existing 3.0 MG gunited concrete reservoir had completed its useful life and was not large enough to meet increased storage requirements for the Walnut Valley Water District. The District determined to replace the existing reservoir with a state-of-the-art 5.4 MG concrete reservoir.
Perliter & Ingalsbe provided a full range of engineering services including preliminary layout of the new facilities, final design of the reservoir and associated components, bidding services, construction management, and continuous inspection.
Major Components and Special Features:
- Demolition of existing 3.0 MG concrete tank
- New 200'x200'x22' deep partially buried cast-in-place concrete reservoir unit with total storage capacity of 5.4 MG
- Two alternate roof systems, a pyramid-shaped aluminum roof structure and the second one using a conventional concrete flat slab structure. (aluminum roof was finally constructed.)
- Stainless steel columns with bracings
- 30" inlet and 30" outlet pipes and valves
- 24" reservoir overflow, 12" drain, 6" sub-drain, and wash down piping
- Three large concrete vaults
- Hatches, ladders, stairways, gravity vents, etc.
- Electrical power supply, controls and instrumentation
- Reservoir access road and facility perimeter road
- Entrance gate, monument wall, and retaining walls
- Proximity to affluent residential area and public outreach program
- Proximity to other four buried concrete reservoirs on the same site
- 4-mile long narrow construction access road through the LA County property
- Limited staging and storage space