Our Projects Highlights
Contract district engineer
Despite the upgrade, the water treatment plant’s existing raw supply pumps were insufficient and thus inefficient. The City retained Pakpour Consulting Group (PCG) to design pump upgrades in order to meet full capacity and improve overall efficiency. PCG also provided design services for the construction of a new building to house the electrical equipment as well as the installation of a permanent 450 kW emergency generator, an automatic transfer switch, and SCADA upgrades. With the system upgrades, the City now has the ability to operate a 300-hp pump along with one 125-hp pump and its generator to maintain operations in the event of an emergency.
constructability and civil plan review
In response to California’s last energy crisis (2000-2002), California Energy Commission (CEC) processed numerous new project “Applications for Certifications” to obtain coverage under the CEC’s Energy Facility Licensing Program.
water distribution engineering
The upgrade required replacing the pump housing to accommodate the new 200-hp pump. It also included replacing
the existing portable emergency generator at the pump station with a permanent emergency generator. In the event of a power outage, the new 400-kilowatt diesel generator now provides enough power to run both a 200-hp and a 100-hp pump. An auto-start feature was added that enables PHWD to startup and operate the generator remotely in order to allow crews to concentrate on other emergencies. Additionally, the pump station is bisected by a large concrete flood control culvert owned by the Santa Clara Valley Water District (SCVWD). With limited space for the new generator, the design fits the foundation within
six feet of the culvert and the existing building—requiring extensive SCVWD coordination.
storm drainage and hydrology
During the construction of a new residential development in an area already prone to frequent flooding, it came to the City of Benicia’s attention the existing 66-inch storm drain system on East Second Street was extensively deteriorated.
Because the project included state and local facilities, the stakeholder group included California State Parks, California Department of Transportation (Caltrans), California Bicycle Coalition, and residents in the area. To ensure the project would be functional, safe, and aesthetically pleasing to the community, Pakpour Consulting Group’s (PCG’s) team worked closely throughout the design phase with the multiple stakeholders by holding monthly meetings. PCG prepared and submitted the preliminary design report to Caltrans for approval. After Caltrans approved the preliminary design report, PCG prepared the final plans, specifications, and cost estimate for a 16-foot-wide bicycle and pedestrian bridge, a 12-foot-wide bicycle path adjacent to the existing edge of pavement, and a concrete barrier separating the bicycle path from the traffic lane.
Pakpour Consulting Group’s (PCG) biggest challenge was the design of the runoff conveyance to the gutter along Central Avenue. Since Central Avenue has no longitudinal storm drains, all runoff is conveyed along the street’s gutters. PCG solved the limitation by incorporating a shallow trench drain system to transport the water flow to the curb and gutter on Central Avenue and modified the site grades to allow for overland drainage release in the event of trench drain failure.