Reservoir Management System Replacement Phase IV
- Owner:
- Moulton Niguel Water District
- Location:
- Mission Viejo and Laguna Niguel, California
- Value:
- $9.3 million
- Completion:
- 2026
- Contractor:
- Pacific Hydrotech Corporation
- Designer:
- Brown and Caldwell
Butier Engineering, Inc. provided construction management and inspection services. Phase IV of the Reservoir Management System Program includes the demolition of the existing OSG systems at four (4) RMS sites, including all equipment, connected piping, buildings, foundations, and utilities. The systems will be replaced with 12.5% bulk hypochlorite or new OSG systems, and ammonia systems. The scope of work includes all equipment, new ammonia systems, connected piping, foundations, containment and separation of chemicals, block buildings, electrical, instrumentation, HVAC, shower/eyewash stations, and site modifications and improvements. New major equipment will include bulk chemical tanks, metering pumps, reservoir mixers, instrumentation, and PLCs that will interface with the District’s central SCADA system.
The reservoir sites include the following:
- El Dorado Reservoir (2.25 MG) – Located near 26491 Lope De Vega Drive, Mission Viejo, CA 92691. Work includes new OSG systems and demolition of existing equipment, connected piping, buildings, foundations, and utilities.
- La Paz Reservoirs (Two 2 MG) – Located near 26842 Preciados Drive, Mission Viejo, CA 92691. Work includes new OSG systems and the existing system will be demolished at the start of construction to make room for the new RMS facility.
- Rancho Reservoirs (Two 1.5 MG and One 2.8 MG) – Located near the intersection of Golden Lantern and Hidden Hills Road, Laguna Niguel, CA 92677. Work includes the construction of new 12.5% bulk sodium hypochlorite. The existing systems will remain in operation and will be demolished after new facilities are operational.
- Saddleback Reservoir (2.0 MG) – Located near the intersection of Marguerite Parkway and Medical Center Road, Mission Viejo, CA 92691. Work includes the construction of a new 12.5% bulk sodium hypochlorite. The existing systems will remain in operation and will be demolished after new facilities are operational.