Repairs to Unlined RCP, Reaches IV-A and IV-B within Prado Inundation Pool
Value: $10,979,505 Contractor: Mladen Buntich Construction Designer: RBF Consulting Schedule: May 2011 – December 2012
Approximately six miles of the Brine Line (Reach IVA and IVB) is located within the Prado Dam inundation area. This portion of the Brine line was installed in the 1980’s and was constructed of unlined reinforced concrete pipe (RCP.) Core samples and a subsequent condition assessment report concluded deterioration of the concrete within the pipe. It was recommended to rehabilitate this portion of the Brine Line with a segmental slip-liner pipe designed to specifically meet the loading conditions imposed by the operation of Prado Dam. The Project as designed will eliminate the effect of the on-going structural deterioration of the unlined RCP, reduce the risk of a catastrophic failure in the environmentally sensitive Prado Basin and provide structural support to meet the loading conditions imposed by the operation of Prado Dam. The project will extend the useful life of these portions of the Brine Line an additional 50 years. Slip-lining is a process where a new pipe is pushed (segmental) into an existing pipe and grouting the annular space between the new pipe and old deteriorating pipe (host) pipe. Access to the existing pipe is through cutting and removing the top half of the existing pipe to allow sufficient space to add new segments of pipe that are pushed into place.
Repairs to Unlined RCP, Reach IV-A Outside of Prado Inundation Pool
Value: $2,244,775.00 Contractor: Insituform Designer: RBF Consulting Schedule: July 2011 – May 2011
This project include about three miles of the Brine Line (Reach IVA Upper) outside of the Prado Dam inundation area. This portion of the Brine line was installed in the 1980’s and was constructed of unlined reinforced concrete pipe (RCP). Core samples and a subsequent condition assessment report concluded deterioration of the concrete within the pipe. It was recommended to rehabilitate this portion of the Brine Line with the Cured in Place Pipe (CIPP) method. The Project as designed will eliminate the effect of the on-going structural deterioration of the unlined RCP and reduce the risk of a catastrophic failure. The project will extend the useful life of this portion of the Brine Line an additional 50 years.
Brine Line Enhancement, Reach IV-D
Value: $1,155,284.96 Contractor: MMC Inc. Designer: RBF Consulting Schedule: May 2011 – May 2012
SAWPA received a $611,010 grant from the State Water Resources Control Board (Proposition 13) to fund two in-line sediment traps. The purpose of the sediment traps is to collect solid material before it reaches the Brine Line inverted siphons. The design and location of the sediment traps will greatly facilitate solids removal from the Brine Line and maintaining hydraulic capacity in the system. The concept of the sediment trap is to reduce flow velocities in the pipeline in a 10’ x 10’ x 16’ vault and allow heavier particles to drop to the bottom of the structure. Similarly, all lighter material, such as organic solids, will float to the top of the structure and allow for easy removal. Both the Schleisman and Euclid sediment traps
Brine Line Relocation in Schleisman Avenue
Value: $1,250,000.00 Contractor: Murrieta Development Inc. Designer: TMAD Taylor & Gaines Completed: December 2011
A portion of Schleisman Avenue between Hellman Avenue and the Cucamonga Channel, in the City of Eastvale, is planned for relocation due to development in the area. As part of the relocation of the road the Brine Line must be relocated to within the new road alignment. The Project includes abandoning about 1,000 feet of the existing Brine Line and constructing about 900 feet of 42-inch PVC lined Reinforced Concrete Pipe within the new re-aligned Schleisman Avenue.
Upper Reach IV-B Maintenance Access Structures MAS
Value: $238,300.00 Contractor: Caliagua, Inc. Construction Designer: SAWPA Staff Consulting Schedule: November 2011 – January 2011
Approximately 8,000 feet of the upper section of Reach IV-B of the Inland Empire Brine Line was designed as an inverted siphon with no access. A significant amount of scale had been building up in this section of the pipeline. SAWPA constructed eight Maintenance Access Structures between Pierce Street and Sampson Avenue to allow assessment and maintenance of previously inaccessible sections of the Brine Line. All Maintenance Access Structures consist of a ductile iron tee fitting with a blind flange. Some of the Maintenance Access Structures are retrofitted with blow-off valves to allow draining the inverted siphon prior to any maintenance activities. An additional Maintenance Access Structure was constructed near Temescal Channel to allow access to a section of the pipe with sharp horizontal bends.
Mission Tunnel Repairs, Reach IV-D
Value: $93,383.00 Contractor: Lucas Builders Inc. Designer: RBF Consulting Completed: November 2011 – January 2011
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: $471,430.00 Contractor: Grand Pacific Contractors Inc. Designer: RBF Consulting Completed: 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.
Brine Line Reach V Maintenance Access Structure
Value: $124,400.00 Contractor: Caliagua Inc. 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.
Brine Line Relocation at Prado Dam
Value: $5,250,000.00 Contractor: Skanska Inc. Designer: CDM Inc. and Krieger & Stewart Inc. Completed: October 2008
Relocated the Brine Line 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.