Water projects

Lake Arrowhead Community Services District
Cedar Glen Water Treatment Plant

W3E was responsible for the design of a new 4.0-mgd water treatment plant to replace an existing facility that was no longer able to comply with drinking water regulations. The design for the ultimate water plant included demolition of the existing plant, pre-ozonation, adsorption clarifier, mixed media filtration, chemical feed, wash water recovery, post chlorination, finished water pumping and operational storage. A new raw water intake pump station at Lake Arrowhead was also included. The first 2 mgd plant phase was placed in operation in 2001.

Santiago County Water District
Harding Canyon Water Treatment Plant Upgrade

The existing water treatment plant did not meet the State Health Department's requirements for treatment of a potable water source under the direct influence of surface water. The preliminary design consisted of identification and evaluation of three alternative technologies to upgrade the existing water treatment plant including direct pressure filtration, membrane filtration, and two-stage filtration. The project addressed the following: site requirements, economic evaluation of capital and O & M costs, disposal of wash water, existing and future regulatory considerations, and project recommendations. The final design included a 500 gpm package pressure filtration system, on-site hypochlorite generation, new product water pump station and wash water concentrate system. Construction was completed and the facility placed into operation in March 2004.

Yucaipa Valley Water District
Water Master Plan

The District provides water to much of the Yucaipa Valley including most of the City of Yucaipa, a portion of the City of Calimesa, and unincorporated areas in San Bernardino and Riverside Counties. YVWD currently satisfies the majority of the service area water demands from groundwater supplied through District-owned wells. An extensive distribution system provides water storage and transmission throughout the District's 18 pressure zones. Additional water sources that will be available to the District in the near future include imported water through the State Water Project (SWP) and recycled water from the District-owned Wastewater Treatment Plant (WWTP). Use of SWP as a potable water source will require construction of a new Yucaipa Valley Regional Water Filtration Facility (WFF) that is currently scheduled to be complete in 2007.

Yucaipa Valley Water District
Regional Water Treatment Plant

W3E acting as an extension of staff for the Yucaipa Valley Water District. The District currently meets the water supply needs of its service area almost entirely through the pumping from local groundwater sources using free chlorine for disinfection. To meet identified demand increases and to reduce the growing overdraft of local groundwater supplies, the District is constructing a new Yucaipa Regional Water Filtration Facility (YRWFF). The YRWFF will treat water from the State Water Project. Treatment process employed include automatic strainers, gravity feed to Pall microfiltration membranes, nanofiltration for control of disinfection byproducts, followed by disinfection with free chlorine. Backwash from the microfiltration system will be conveyed to the non-potable water system following treatment with dissolved air flotation thickeners. Nanofiltration concentrate will also be conveyed to the non-potable system as allowed while maintaining compliance with TDS requirements. W3E has been involved in the project from the Master Plan, preliminary design, final design and into construction.

East Pasadena Water Company
Capital Improvement Program and Well Construction

The East Pasadena Water Company (EPWC) is a private water company that provides water service to approximately 2,750 customers. The major source of water for EPWC's system is groundwater from the Raymond Basin (about 500 afy) and the Main San Gabriel Basin (about 1,400 afy). A Capital Improvement Plan was prepared by Water 3 Engineering and identified a need for an additional well in the Raymond Basin to assure adequate water supply. Water 3 Engineering acted as Program Manager to assist EPWC with development, design and construction of the new well.

Lake Arrowhead Community Services District
Emerald Bay Intake Pump Station

Water 3 Engineering designed a new intake pumping station to replace the existing pump station at Emerald Bay in order to supply raw water to the Cedar Glen Water Treatment Plant. The new pump station includes intake screens and piping, submersible pumps in the lake, emergency power generation facilities, instrumentation and controls. The submersible pumps were equipped with variable frequency drives to provide a minimum of 700 gpm and a maximum of 2800 gpm. Also included in the project was the replacement of approximately 700 feet of raw water feed pipeline that traverses State Highway 73. This was accomplished using pipe bursting technology.

Elsinore Water District
Junkle Tank Project

Elsinore Water District provides water service to approximately 4,700 customers within and near the City of Lake Elsinore. W3E prepared a Capital Improvement Plan in 2005 for the District to identify recommended projects. The CIP identified the installation of a new 315,000-gallon tank at the former Junkle Tank site as a necessary project. Between December 2005 and present, W3E prepared design documents, coordination with the City, Traffic Control Plan and mitigated negative declaration, for the three parts of the Junkle project: Junkle Tank, Sunnyslope Ave Pipeline and the Junkle Booster Pump Station. Junkle Tank is currently under construction and consists of a 315,000 gallon bolted steel tank. The Sunnyslope Ave Pipeline was completed in October 2006 and and consists of approximately 4,500 feet of 8-inch PVC transmission line. The Junkle Booster Pump Station is currently in design and construction is anticipated to begin in November 2006. The pump station will consist of three horizontal split case pumps and a pressure reducing station, which will allow the District both to fill Junkle Tank and backfeed the lower pressure zone from Junkle Tank. W3E is providing construction administration and inspection for this project.