Recently Completed Projects

Mission Tunnel Repairs, Reach IV-D

Value: $93,383

Contractor: Lucas Builders Inc.

Designer: RBF Consulting

Schedule: March – May 2009

Repair minor defects discovered in the approximately 2,000 foot long Mission Tunnel located along Reach IV-D in unincorporated Riverside County. Defects were found during closed circuit television inspection and included minor infiltration at pipe joints and the presence of debris in the pipe invert.  

 

Reach IV-B Joint Repairs and Re-establish Maintenance Road

Value: $471,430

Contractor: Grand Pacific Contractors, Inc.

Designer: RBF Consulting

Schedule: February – October 2009

 

Repair portions of Reach IV-B located within the inundation area upstream of Prado Dam. Seal leaking joints on the 36-inch diameter reinforced concrete pipeline, raise manhole lids covered by sediment deposited from storm water, and re-establish the 10-foot wide maintenance access road by removing vegetation.

New Manhole Riser

Re-establish Maintenance Road

 

SARI Reach V Maintenance Access Structure

Value: $124,400

Contractor: Caliagua

Designer: CDM Inc.

Completed: September 2008

 

Install a new maintenance point providing access to the interior of the pipeline to conduct activities such as closed circuit television inspection of the pipe and pipeline cleaning.

 

 

SARI Relocation at Prado Dam

Value: $5,250,000

Contractor: Skanska

Designers: CDM Inc., Krieger and Stewart Inc.

Completed: October 2008

 

Relocated the SARI at Prado Dam to eliminate conflicts with new facilities installed by the Corps of Engineers during the raising of the Dam. Pipelines were installed through the original dam outlet works which is no longer being used. New high density polyethylene pipe replaced 60 year old steel pipe in poor physical condition.

 

 

 

 

Completed Projects - Historical

Since its creation in 1975, SAWPA has been involved in a number of projects where SAWPA was the lead or co-lead agency, in which the project was designed, constructed, and tested. After bringing the project on line, SAWPA then turned over the operations and management of the project to another agency/entity. This page summarizes some of the major projects that have been developed by SAWPA in this way.

 

Stringfellow Treatment Plant - Pedley, California

Stringfellow, a current Federal Superfund site, is located in Pyrite Canyon, northwest of the city of Riverside. Stringfellow was an authorized site for hazardous waste disposal until 1972 when operations were discontinued because contaminants were discovered to be leaking from the site. In cooperation with the U.S. Environmental Protection Agency (EPA) and the State of California Department of Health Services, SAWPA constructed a series of wells and a sophisticated treatment plant to remove heavy metals and organic pollutants that were threatening local groundwater supplies. The treated water is piped to and disposed of in the SARI line, after being sampled and analyzed to assure that the treated water quality meets the restrictive permit levels for discharge into the SARI line system. After constructing the system in the early 1990s and sampling water quality through the mid 1990's, SAWPA turned over all operations to the California Department of Toxic Substances Control (DTSC). Visit the EPA page for additional information on the Stringfellow site.

 

Woodcrest Pipeline - Riverside, California

The Woodcrest pipeline was constructed to convey high quality State Project water from Northern California from the Mills Water Treatment Plant in eastern Riverside to agricultural interests in the Arlington Heights-Woodcrest area of Riverside. Irrigators previously had been utilizing much saltier Colorado River water for crop watering, which adversely affected groundwater in the region. The line, 20 miles long, ranges from 60 inches in diameter at the Mills Plant, to 42 inches at the downstream terminus near the I-15 freeway intersection with Cajalco Road, south of the city of Corona. Following project completion, the pipeline was turned over to the Western Municipal Water District for operation.

 

Chino Basin Desalting Program - Chino, California

Over one hundred years of irrigated agricultural use, combined with more recent dairy operations in the lower Chino Basin area, have caused groundwater to become brackish and high in nitrates. In cooperation with a large number of water agencies, SAWPA planned, designed, and constructed the first Desalter, which is part of an overall basin desalting program. The construction of the Chino I Desalter system initiates the reversal of groundwater contamination through the removal of approximately 10,000 tons of salts annually.

The Chino I Desalter is the first phase of an estimated 30,000 acre feet per year total desalting effort planned for the lower Chino groundwater basin to be developed over the next 15 years. Chino I Desalter construction began in September 1998 and was delivering water to area agencies in August 2000. In February 2002, ownership and operation of the Chino I Desalter was turned over to the Chino Basin Desalter Authority (CDA), a Joint Powers Authority made up of the water purchasers and the Inland Empire Utilities Agency.

The future expansion of the Chino groundwater desalting program is proceeding under the CDA in part with $48M in funds from the SCIWP (water bond) to increase the salt removal and cleanup of the basin. This expansion consists of a new desalter (Chino II) and an expansion of the existing Chino I Desalter.

 

Chino I Desalter Details

The $53 M Chino Desalter produces approximately eight million gallons per day (MGD) of potable water and has been operational since August 2000. Facilities consist of 11 groundwater wells located within the southern portion of the Chino Groundwater Basin, in the City of Ontario, a central water treatment plant (WTP), and pipelines to deliver water from the wells to the WTP, and from the WTP to the water retailers (Cities of Chino and Chino Hills, Jurupa Community Services District). The water treatment process removes Total Dissolved Solids (TDS, a measure of salt content) and consists of pre-treatment (particulate removal by cartridge system, chemical addition), a reverse osmosis (RO) process (pumps, pressure vessels, membranes) and RO process post treatment (carbon dioxide removal by decarbonator process), post treatment of the final blended water (chemical addition for corrosion control and disinfection), a final clearwell, and three separate pump stations to deliver the treated water. To save capital and operating costs, a portion of the raw water is treated and a portion is allowed to bypass the RO process. The resulting blend meets the CA Title 22 drinking water standards. Brine concentrate from the RO process is discharged to the Santa Ana Regional Interceptor (SARI). Approximately 1.5 MGD is discharged when the WTP is operating at 8MGD. The eleven wells are all 16-inches in diameter, ranging in depth from 280 to 545 feet below ground surface, and produce from 300 to 1,200 gpm. Pump sizes range from 40 to 125 horsepower. The project required approximately two years for construction and start up.

 

Western Riverside County Regional Wastewater Treatment Facility - Norco, California

After many years of preliminary planning, a Joint Powers Authority was formed in 1992 to pursue the construction and operation of a new regional wastewater treatment facility on a site located just northwest of the City of Norco. Members of the Western Riverside County Regional Wastewater Authority (WRCRWA) are:

*Western Municipal Water District

*City of Norco

*Home Gardens Sanitary District

*Jurupa Community Services District

*SAWPA

Through the cooperative efforts of all participants, engineering design for the collection and treatment facilities began in 1992 with construction beginning on the treatment plant in 1995. The facilities, completed in 1998, include processes to provide tertiary treatment levels that meet or exceed all California Regional Water Quality Control Board standards for discharge of the reclaimed water to the Santa Ana River. Initial capacity of this treatment facility is 8 MGD, expandable to 32 MGD. SAWPA was designated as the administering authority on behalf of the Joint Powers Authority members during construction. The facility is now in full operation and operated by the WRCRWA. For more information, click on the link to Western Municipal Water District.

 

Rapid Infiltration/Extraction (RIX) Wastewater Treatment Plant - Colton, California

The Cities of San Bernardino and Colton were required by the California Regional Water Quality Control Board (RWQCB) to upgrade the quality of their wastewater discharges to the Santa Ana River to meet certain established discharge standards. In cooperation with SAWPA and with the approval of the RWQCB, a demonstration project was developed by the participants to evaluate the effectiveness of an experimental wastewater tertiary treatment process known as RIX. A 2 MGD demonstration facility was constructed, operated, and evaluated for a one year period.

In this process, secondary treated wastewater from the two cities' treatment plants was applied to a percolation basin. As the wastewater percolated through the soil, physical and biological treatment occurred removing many harmful pollutants from the wastewater. After the water infiltrates approximately 15 feet deep, the treated wastewater was extracted trough shallow wells surrounding the basin and then discharged to the Santa Ana River. The results indicated that the RIX is a very effective and economical tertiary treatment process. The pipelines and related facilities, along with the RIX site facilities, were placed into service in 1995. The facilities are effectively operating to assist the cities, and ownership and operation was transferred to the cities. Click on the link for the City of San Bernardino Water Department for more information.

 

Temescal Valley Regional Interceptor (TVRI) Line Western Riverside County, California

SAWPA completed construction of a Santa Ana Regional Interceptor (SARI) extension in 2002. The TVRI line runs from the City of Corona to near Lake Elsinore through the Temescal Canyon, and conveys non-reclaimable wastewater from Eastern and Western Municipal Water Districts' service areas to the main SARI line. This 23-mile long pipeline conveys high total dissolved solids (TDS) water from the Menifee Desalter to the SARI line. Unlike the other projects on this list, the TVRI line was not turned over to other agencies for operation; this separate project was integrated with the SARI line as the new Reach V.