Yorba Linda Blvd. Booster Pump Station, Yorba Linda Water District
LEE + RO prepared a preliminary design report, final design documents, and provided bidding and engineering services during construction for a new 4,300 gpm capacity potable water booster pump station along with a 5,000 LF long, 24-inch diameter water transmission main. The tasks included pump station siting, a surge analysis, and hydraulic modeling of the new pump station and transmission main. The pump station is equipped with two 2,700 gpm/150 hp pumps and one 1,250 gpm/60 hp pump. Double polyethylene encasement with a cathodic protection system was provided for the main. The main is located in a major thoroughfare and required extensive permit coordination with utility agencies to clear buried utilities including the 120-inch diameter Metropolitan Water District Feeder. The total construction cost was $3.9 million.
Hidden Canyon Planning Area 1 Zone 3 to 4 Domestic Water and Zone B to C Recycled Water Booster Pump Station, Irvine Ranch Water District
LEE + RO provided a preliminary design report, final engineering design documents and construction phase engineering services for this $4.1 million combined domestic water and recycled water pumping facility for a new 255-acre residential development. The domestic water pump station consists of four 15 HP and two 100 HP VFD driven pumps including standby with a capacity of 2,170 gpm. The recycled water pump station consists of four 15 HP VFD driven pumps with a capacity of 475 gpm. Project elements included connections and tie-ins to existing facilities, utility research + permitting, surge analysis, site, structural, mechanical, HVAC, architectural, and electrical and instrumentation designs.
Arbor Ridge Potable Water Reservoir and Pump Station Improvements, Walnut Valley Water District
LEE + RO provided engineering, design and construction support services for a $3 million project consisting of the addition of a new potable water reservoir and upgrades and improvements to the existing pump station. The station had a capacity of 1,825 gpm with a single 575 gpm 25 hp vertical turbine pump used to maintain water levels in the hydro-pneumatic tank and a 1,250 gpm 60 hp pump that served as a fire pump. Design investigations included a hydraulic network analysis and surge modeling. The project increased the station capacity to 3,500 gpm and included upgraded electrical and control systems. The project included a new 1 MG capacity welded steel tank with an aluminum dome roof, mixing system and cathodic protection. The work also included acoustic sound barrier walls, site grading + paving, security fencing, landscaping and an irrigation system that included a green screen to shield the reservoir from the residential neighbors.
36-inch Diameter, 4-mile Long, Jamacha Road Potable Water Transmission Main, Otay Water District
LEE + RO provided engineering, design, and construction phase engineering services for a $16 million, 21,000 LF long, 36-inch diameter CML+C potable water transmission main from San Diego County Water Authority’s No. 14 Flow Control Facility in El Cajon to the 640-1 and 640-2 Water Reservoirs located in the District’s regulatory site at Campo Road, Spring Valley. The project also replaced 3,500 LF of 12-inch diameter steel pipe with PVC pipe. To determine the most feasible alignment, LEE + RO employed the “Analytic Hierarchy Process (AHP), also called the Pairwise Comparison Method (PCM). The AHP reduces complex criteria to a series of one-on-one criteria comparisons. Significant project challenges included obtaining the permit from Caltrans for the encroachment along the main artery - Jamacha Road (SR54/S17). This project was awarded the “APWA Project of the Year,” “ASCE Engineering Excellence” and “CMAA Project Achievement Award.”