BOARD AGENDA MEMORANDUM
SUBJECT:
Title
Adopt Plans and Specifications and Authorize Advertisement for Bids for the Almaden Valley Pipeline Inspection and Rehabilitation Project, Project No. 95084002 Contract No. C0631 (City of San Jose, Town of Los Gatos, and Unincorporated Santa Clara County), (Districts 4 and 7).
End
RECOMMENDATION:
Recommendation
A. Adopt the plans and specifications and authorize advertisement for bids for inspection and rehabilitation of the Almaden Valley Pipeline per the Notice to Bidders;
B. Authorize the Designated Engineer to issue addenda, as necessary, during the bidding process; and
C. Find that the Almaden Valley Pipeline Inspection and Rehabilitation Project is substantially complex and, therefore, requires a construction contract retention of 10 percent.
Body
SUMMARY:
The Almaden Valley Pipeline Inspection and Rehabilitation Project (Project) is the first project to be completed under the District’s 10-year Pipeline Inspection and Rehabilitation Program. The purpose of this program is to maintain the integrity of the approximately 140 miles of large diameter raw and treated water transmission pipelines, extend their useful life, and address infrastructure reliability concerns. Approving the recommended actions will allow staff to proceed with advertisement for construction bids for the Project.
Project Background
The proposed Project involves inspection, maintenance, and rehabilitative work on the Almaden Valley Pipeline (AVP) as part of the Pipeline Maintenance Program (PMP).
The AVP consists of approximately 12 miles of 72-inch to 78-inch diameter Prestressed Concrete Cylinder Pipe (PCCP) and welded steel pipe (WSP). The pipeline was constructed in two major segments; AVP Unit 1 was constructed in the 1960’s, and AVP Unit 2 was constructed in the 1980’s. The AVP is used to supply raw water to the District’s water treatment plants and groundwater recharge facilities. In 2007 and 2008, staff completed inspection and rehabilitation projects on the AVP. In 2011, staff repaired a damaged section of PCCP that was identified during an inspection of the AVP. The damage to the pipe section was caused by increased stress from a newly-constructed bridge abutment.
The proposed work for this Project consists of the following:
1. Dewatering the pipeline and completing an internal visual inspection;
2. Performing an electromagnetic inspection of the pipeline to identify distressed pipe sections;
3. Replacing and rehabilitating in-vault pipeline appurtenances and assembly components at up to ninety-five (95) sites;
4. Installing an acoustic fiber optic cable monitoring system to monitor wire breaks on PCCP;
5. Performing internal pipeline repair work, including the installation of Carbon Fiber Structural Reinforcement for PCCP, as needed, on damaged and/or deteriorated pipeline sections identified during the internal pipeline inspection.
Construction of the proposed Project is scheduled to begin in October 2017 and end in March 2018.
The shutdown of the AVP will also shut down the Santa Teresa Water Treatment Plant (STWTP). To limit the duration of the STWTP shutdown, the Project work will be completed in two phases. Phase 1 will include inspection and rehabilitation of the AVP from the Coleman Line Valve to Calero Reservoir and is scheduled to be completed in January 2018. Completion of this phase of work will allow raw water supplies to resume through this portion of the AVP and allow the STWTP to be returned to service. Phase 2 of the project will include inspection and rehabilitation of the AVP from the Vasona Pumping Plant to the Coleman Line Valve, and will be completed by the end of March 2018.
Coordination and planning efforts with local, State and Federal water supply and regulatory agencies regarding the pipeline shutdown will be completed prior to Project award. Contingency planning for potential conflicts with concurrent District operations has been evaluated and the ability to move the proposed Project construction dates or cancel contract award is addressed in the Project specifications.
Construction Contract Retention
Public Contract Code (PCC) Section 7201 has been amended to limit retention amounts for public works construction contracts to five percent (5%) of the total contract price. PCC section 7201(b)(4) provides that retention proceeds on a project may exceed 5% where the Board makes a finding that the proposed project is “substantially complex” and, therefore, requires a retention amount greater than 5%.
To comply with the PCC in regard to increasing the retention to 10%, staff recommends the Board find that the Project is substantially complex based on the precision required to perform this critical work and shutdown schedule constraints necessary to minimize unplanned disruption in the delivery of raw water to Santa Clara County.
Previous Board Actions Related to this Project:
Attachment 2 provides a summary of Board actions related to the Project Delivery Process for the Project.
On November 13, 2007, the Board certified the Pipeline Maintenance Program Environmental Impact Report (PMP EIR) and adopted the Mitigation Monitoring Plan.
On April 13, 2010, the Board held a public hearing and adopted Resolution 10-29 approving the PMP Engineer’s Report and approving the PMP.
Next Steps
The District has applied for and anticipates approval of the 1602 Lake and Streambed Alteration Agreement (LSAA) from the California Department of Fish and Wildlife (CDFW) prior to contract award. District staff received a Complete Notification from CDFW dated July 21, 2017 and therefore CDFW has until September 19, 2017 to issue a draft agreement or inform District staff that an agreement is not required.
If the Board approves the recommendations, staff will proceed to advertise the Project for construction bids. Staff anticipates recommending the Board to award a construction contract on September 26, 2017.
FINANCIAL IMPACT:
The total cost of the Project is estimated at $12 million and is included in the FY 18-22 CIP as part of the 10-year Pipeline Inspection and Rehabilitation Program with a total cost of $97 million. The funds needed for the planned Project work for this fiscal year are included in the Fiscal Year 2018 Board-adopted budget.
The estimated cost of the construction contract for the Project is in the range of $3.0 to $3.6 million. Additional budgeted funds are for other contracted and non-contracted Project activities such as: confined space support, high-angle rope access support, electromagnetic inspection, acoustic fiber optic monitoring system installation, project planning and design, project administration, biological and regulatory oversight and monitoring, parts and materials procurement, and facility isolation and restoration.
Table 1 provides a breakdown of the estimated costs of all Project activities.
Table 1 - Estimated Project Costs for
Almaden Valley Pipeline Inspection and Rehabilitation Project
|
Project Activity |
Estimated Cost |
|
Planning/Design Phase |
$500,000 |
|
Pipe Materials/Monitoring System |
$3,700,000 |
|
Construction Phase |
$7,600,000 |
|
TOTAL |
$11,800,000 |
CEQA:
On November 13, 2007, the Board certified the Pipeline Maintenance Program Environmental Impact Report (PMP EIR) [Resolution No. 07-71]. The PMP provides for the maintenance of the District’s 14 raw water pipelines and 9 treated water pipelines. Potential impacts related to all components of the Project have been evaluated and mitigation measures are specified in the PMP EIR. During Project implementation, the District and the contractor will comply with all BMPs and mitigation measures per the PMP EIR.
ATTACHMENTS:
Attachment 1: Notice to Bidders
Attachment 2: Project Delivery Process Chart
Attachment 3: Map
*Supplemental Agenda Memo
*Supplemental Attachment 1
UNCLASSIFIED MANAGER:
Manager
Christopher Hakes, 408-630-3796