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Agenda Item
ASR
Control 12-000364 |
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MEETING DATE: |
03/20/12 |
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legal entity taking action: |
Board of Supervisors |
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board of supervisors
district(s): |
3 |
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SUBMITTING
Agency/Department: |
OC Public Works
(Approved) |
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Department contact
person(s): |
Jess Carbajal (714) 667-3217 |
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Ignacio Ochoa (714) 667-3213 |
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Subject:
SARI Mainline and Yorba Linda
Spur Status
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ceo Concur |
County
Counsel Review |
Clerk of the Board |
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Concur |
No Legal Objection |
Discussion |
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3 Votes Board Majority |
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Budgeted: N/A |
Current Year Cost:
N/A |
Annual Cost:
N/A |
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Staffing Impact: No |
# of Positions:
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Sole Source:
N/A |
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Current Fiscal Year Revenue: N/A |
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Funding Source: Flood
Fund 404: 100% |
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Prior Board Action: N/A
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RECOMMENDED ACTION(S):
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Receive and file report on the status of the Santa Ana River Interceptor (SARI) Yorba Linda Spur and Mainline and Projects as of March 12, 2012. |
SUMMARY:
Your Board is being provided with a status report on the Santa Ana River Interceptor (SARI) Yorba Linda Spur and Mainline Projects as of March 2012, given significant unanticipated project developments.
BACKGROUND INFORMATION:
The Santa Ana River Interceptor (SARI) Line is a
regional sanitary sewer line that conveys raw sewage and brine from the Inland
Empire and Orange County to the Orange County Sanitation District (OCSD)
treatment plant in Fountain Valley. A
segment of the SARI Line between Weir Canyon Road and Prado Dam was originally
buried about 20 feet below the river bed.
Over time, the soil cover over this segment has experienced heavy
erosion and the pipeline is exposed at several locations requiring OCSD to
perform annual surveys to evaluate the condition of the SARI Line and implement
costly protective measures and repairs.
The potential for major damage to the SARI Line increases should the
U.S. Army Corps of Engineers be forced to release flows from Prado Dam that
exceed its historical high of approximately 10,000 cubic feet per second.
The SARI Line Projects are being constructed through two separate construction contracts, the Yorba Linda Spur Project and the SARI Mainline Project, in support of expediting construction completion. Construction support service contracts provide certain ancillary field inspection and engineering functions in support of project construction. The support service consultants provide a Construction Project Manager, Resident Engineer, Scheduler, Inspection field staff, and office staff to support each Project. OC Public Works Inspection and the construction support services consultants make-up and oversight team that reviews Monthly Progress Estimates, Contract Change Orders, and major contract directives.
YORBA LINDA SPUR PROJECT
On May 3, 2011, your Board awarded the Yorba Linda Spur contract to Los Angeles Engineering, Inc and construction began in July 2011. The City of Yorba Linda owns two sewer laterals that currently connect to the existing SARI Line on the north side of the river, which will be affected by the SARI Line relocation. The Yorba Linda Spur Project consists of a separate sewer line under La Palma Avenue and the Santa Ana River Trail, which will enable the City to reconnect its existing City laterals to the relocated SARI Line. The Project consists of the construction of a new 15-inch gravity sanitary sewer in La Palma Avenue, a dual 10-inch siphon across the Santa Ana River, and a new 18-inch gravity sanitary sewer connection to the existing SARI pipeline. Upon completion of the improvements, the City of Yorba Linda will assume ownership and maintenance for the portion of the improvements made within its jurisdiction. The current status of the Yorba Linda Spur project is as follows:
Approved Contract Change Orders (CCO):
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CCO No. 1 |
Change to American Society
for Testing and Materials (ASTM) Soil Test Methods to Caltrans Test Methods
to expedite test results. Cost =
$0.00 |
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CCO No. 2 |
Relocate and replace 2-inch OCSD conduit at control gate structure in conflict with Manhole MH-0000 not shown on plans for an approximate cost of $12,000.00 and remove buried rip rap not shown on the contract documents for an approximate cost of $18,000.00. Cost = $30,000.00. |
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CCO No. 3 |
Per the City of Yorba Linda Encroachment Permit, trench plates on La Palma Avenue are to be recessed (change from requirements outlined in the contract documents). Cost = $23,558.52. |
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CCO No. 4 |
Costs associated with repair of gas line along La Palma Avenue. Cost = $2,800.00. |
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CCO No. 5 |
Perform exploratory potholing of the existing Santa Ana River Sewer Interceptor as requested by Orange County Sanitation District. Cost = $49,910.94. |
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CCO No. 6 |
Standby time for shoring rental and dewatering during redesign of manholes. Cost = $49,500.00. |
Pending Change Orders:
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CCO No. 7 |
The existing SARI line was found to be larger diameter than used in design of the tie-in manholes and the MH-0000 manhole base had to be redesigned to accommodate the larger manhole base. Estimated Cost = $78,020.41 |
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CCO No. 8 |
The existing SARI line was found to be larger diameter than used in design of the tie-in manholes. The MH-0015 manhole base had to be redesigned to accommodate the larger manhole base. Estimated Cost = $79,048.86. |
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CCO No. 9 |
Modify K-rail, traffic control devices and striping to accommodate pedestrian access as directed by the City of Yorba Linda. Estimated Cost = $15,000.00. |
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CCO No. 10 |
Additional drilling for shoring at MH-0035 required due to buried concrete not shown on the contract documents. Estimated Cost = $30,000.00. |
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CCO No. 11 |
Remove rip rap not shown on the contract documents between MH-0005 and MH-0010. Estimated Cost = $30,000.00. |
Issues at Hand:
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a. |
Based on the February Schedule Update the Project is approximately ten weeks behind schedule expected to complete approximately ten weeks behind schedule and options for project schedule recovery are being explored and evaluated including accelerating crews and working weekends. |
SARI MAINLINE PROJECT
On August 9, 2011, your Board awarded the SARI Mainline contract to W.A. Rasic Construction, Inc. and construction began in October 2011. This Project will abandon the existing SARI Line that would be affected by the planned higher Prado Dam releases and construct a new sewer line beginning near the Savi Ranch development on the south side of the river, along State Route-91 and terminating on the north side of the river on the Green River Golf Club. The pipeline will consist primarily of a 54-inch diameter pipe and is designed to convey 43 million gallons per day. In addition, a new metering station is proposed to be constructed within Featherly Regional Park. The current status of the Mainline project is as follows:
Approved Change Orders:
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CCO No. 1 |
Change to American Society for Testing and Materials (ASTM) Soil Test Methods to Caltrans Test Methods to expedite test results. Cost = $0.00 |
Pending Change Orders:
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CCO No. 2 |
Unknown existing buried rip rap. Estimated Cost = $270,000. |
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CCO No. 3 |
Removal of unknown existing soil cement slope stabilization. Estimated cost = $150,000. |
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CCO No. 4 |
Hand excavation and potholing of existing Caltrans tiebacks through existing soil cement not shown on the contract documents. Estimated Cost = $55,000. |
Issues at Hand:
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a. |
Unforeseen rip rap and rolled compacted concrete discovered not shown on the plans discovered during benching and excavation processes and compacted concrete under grouted rip rap at Caltrans tie-back wall. These will be addressed under CCO Nos. 2 and 3. |
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b. |
Contractor has elected to place asphalt concrete to widen the shoulder of the on-ramp to CA-91 (Caltrans Permit) in lieu of utilizing traffic control. Contractor disputes costs of paving. |
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c. |
Securing of additional access from regulatory agencies for construction activity. |
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d. |
Gnatcatchers and Least Bell’s Vireo were sighted but not seen nesting. The project biologist is currently monitoring the birds within the project limits. |
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e. |
Currently, Contractor seeking 52 day delay due to delay in obtaining Caltrans Double Permit, lack of access, buried rip-rap and unforeseen rolled soil cement. Contractor has submitted Time Impact Analysis. Staff is evaluating and reviewing their Time Impact Analysis submittal. |
OC Public Works will provide your Board with monthly
status updates for each of the above projects and explore all options with the
construction support consultants and construction contractors for minimizing
negative impacts on the project schedule and budget.
Compliance with CEQA: On March 1, 2011, Final Supplemental Environmental Impact Statement/Environmental Impact Report 583 /IP 03-226, previously certified by your Board on October 6, 2009 and Addendum IP 10-334, administratively approved on October 20, 2010, were found adequate to satisfy the requirements of CEQA and were approved for these Projects. This receive and file report is not a project as defined by the CEQA Guidelines.
FINANCIAL IMPACT:
Current project costs are within the approved Project Budget.
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SARI LINE PROJECT COSTS |
Estimated Cost as of 3/12/2012 |
Approved Project Budget |
Variance |
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Soft Costs: |
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OC Public Works Management and Staff Costs |
$9,000,000 |
$7,100,000 |
$1,900,000 |
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Contracts, Agreements, Property Acquistion, etc. |
$4,500,000 |
$2,500,000 |
$2,000,000 |
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Design (Tetra Tech) and Construction Management (MWH) |
$23,000,000 |
$19,400,000 |
$3,600,000 |
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Soft Cost Sub-Total |
$36,500,000 |
$29,000,000 |
$7,500,000 |
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Construction Costs: |
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Yorba Linda Spur |
$7,210,000 |
$ 7,300,000 |
($90,000) |
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Mainline and Metering Station |
$41,850,000 |
$77,400,000 |
($35,550,000) |
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Construction Cost Sub-Total |
$49,060,000 |
$84,700,000 |
($35,640,000) |
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Contingency costs |
$14,440,000 |
$6,300,000 |
$ 8,140,000 |
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Estimated Total Project Cost |
$100,000,000 |
$120,000,000 |
($20,000,000) |
STAFFING IMPACT:
N/A
EXHIBIT(S):
Exhibit A - Photos