City of Upland Prestressed Concrete Tank, Upland, CA
WHB Engineers was tasked with both strengthening an existing tank as well as designing a new 7.5 MG circular, prestressed concrete tank and pump station improvements. The City was concerned that their current tank could potentially fail after a similar design in another jurisdiction made headlines in 1998 with a catastrophic failure. WHB Engineers managed the design for temporarily strengthening the original tank by installing steel strands along the exterior upper and lower areas of the tank. WHB then prepared the plans, specifications, and estimates for a new tank designed in accordance with California Building Code, ASCE 7, AWWA D110. WHB Engineers was responsible for completing both the structural design along with EI&C, mechanical, and water quality.
16 Tank Assessment
WHB Engineers conducted a seismic assessment for the City of Redlands. The City of Redlands selected WHB Engineers to complete a seismic assessment of eighteen (18) of the City’s potable water storage reservoirs, seven (7) pump stations, and two (2) transmission mains for the Water Division. The work involved a study of existing interior and exterior conditions, a seismic code assessment, recommended improvements, a hydraulic analysis of the entire system with an eye on reservoir consolidation opportunities, and a budget level cost.
Assessment and Rate Case Evaluation of 45 Tanks
This study included the assessments, inspection, analysis, design upgrades, and cost-estimates for 45 water storage facilities including 22 steel tanks and 23 concrete tanks. The inspection included interior ROV inspection, performe for WHB Engineers .
The analysis was performed using site-specific seismic values to satisfy the current Code as well as addressing upcoming seismic requirements. Analysis was performed considering the latest editions of AWWA, ACI, CBC, and ASCE 7 documents.
Electrical & Controls As-Needed Services
Since 2013, WHB Engineers has delivered Electrical and Controls As-Needed Services to the San Diego County Water Authority, showcasing expertise in design, construction, and overcoming project challenges for optimal outcomes.
Pure Water Electrical Design
The City of San Diego has initiated a Pure Water project that will use proven water purification technology to clean recycled water to produce safe, high-quality drinking water. The Program offers a cost-effective investment for San Diego’s water needs and will provide a reliable, sustainable water supply. WHB Engineers was tasked with creating the electrical design for the new 34 MGD Pure Water Plant in San Diego, CA.
Mayfield Booster Pump Station
The Mayfield booster pump station (BPS) was originally constructed in 1970 and had reached the extent of its expected service life. California American Water (CAW) had decided to replace the BPS with a modern premanufactured below-ground pump station that would alleviate several of the issues that were identified in the BPS condition assessment. The new BPS provides for more efficient operation with variable frequency drive (VFD) domestic water pumps; additional fire flow capacity to meet county requirements; emergency generator; ventilation; sound attenuation; and greater accessibility for maintenance.
Upper Valle De Los Caballos Regional Pump Station
The Upper Valle De Los Caballos Regional Pump Station project involved designing a new pump station, chlorine contact tank, sodium hypochlorite facility, and interconnecting pipelines for water distribution in UVDC. WHB Engineers managed electrical and control systems design, ensuring capacity for existing and future loads.
Otay Crossings Commerce Park Sewage Pump Station
Otay Crossings Commerce Park’s Sewage Pump Station, serving the East Otay Mesa’s new development, features a 7700-gallon wet well, 15,000-gallon emergency storage, and advanced electrical and control systems by WHB Engineers.
Temple Hills Pump Station Rehabilitation
Embarking on Temple Hills Pump Station Rehabilitation, addressing the deteriorated 1950s structure. WHB Engineers takes charge, enhancing pumps, structure, and integrating advanced mechanical and electrical components for optimal functionality.
Reservoir No.2 and Pump Station Rehabilitation
WHB Engineers successfully revamped Fountain Valley’s Reservoir No.2 and Pump Station in 2016, replacing an outdated pump station, enhancing aesthetics, and ensuring secure water facilities. Construction value: $580,000.