BOARD AGENDA MEMORANDUM
SUBJECT:
Title
Adopt Plans and Specifications and Authorize Advertisement for Bids for the Cross Valley and Calero Pipelines Inspection and Rehabilitation Project, Project No. 95084002, Contract No. C0650 (San Jose, Morgan Hill, and Unincorporated Santa Clara County), (Districts 1 and 7).
End
RECOMMENDATION:
Recommendation
A. Adopt Plans and Specifications and Authorize Advertisement for Bids for the Cross Valley and Calero Pipelines Inspection and Rehabilitation Project, per the Notice to Bidders;
B. Find that the Cross Valley and Calero Pipelines Inspection and Rehabilitation Project is substantially complex and requires a construction contract retention of 10 percent; and
C. Authorize the Designated Engineer to issue addenda, as necessary, during the bidding process.
Body
SUMMARY:
The objective of the Cross Valley and Calero Pipelines Inspection and Rehabilitation (Project) is to increase the reliability and useful life of these pipelines.
The Project scope of work includes the dewatering and inspection of the pipelines; repair and rehabilitation of the appurtenances; replacement of approximately 80 lineal feet of 48-inch and 54-inch piping with 60-inch piping; replacement of line valves; installation of an Acoustic Fiber Optic (AFO) monitoring system; and installation of other miscellaneous pipeline vault appurtenances such as new ladders and hatches.
Staff has completed the final design and other construction documents and is recommending the Board approve the plans and specifications and authorize advertisement for Bids for Construction of the Project per the Notice to Bidders (Attachment 1).
Project Background
The Cross Valley and Calero Pipelines consist of 10.6 miles of 78-inch and 72-inch prestressed concrete cylinder pipe which was constructed in five different phases from 1980 through 1990. The pipeline begins as the Cross Valley Pipeline at the Coyote Pumping Plant in the City of Morgan Hill, runs northwest through Morgan Hill and unincorporated sections of Santa Clara County, continues northwest through the Coyote Valley Open Space Preserve and near Cinnabar Hills Golf Club where Cross Valley Pipeline ends and Calero Pipeline begins, continues along McKean Road, and ends north of the base of the Calero Reservoir in south San Jose at the Calero Modulating Valve Vault.
The Cross Valley and Calero Pipelines are included in the District’s Pipeline Maintenance Program (PMP) and are an identified capital effort under the 10-Year Pipeline Inspection and Rehabilitation Program. The PMP defines the activities associated with maintenance and repair of water supply conveyance systems throughout the District’s jurisdiction. The PMP serves as a comprehensive plan that defines how routine and preventative maintenance activities can be carried out. The primary objectives of the PMP are to maintain the District’s water conveyance systems to their specifications and design; coordinate the various aspects of routine maintenance to achieve this goal; reduce environmental impacts associated with maintenance; and assist in obtaining multi-year permits for these activities.
The purpose of the 10-Year Pipeline Inspection and Rehabilitation 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. The Project is the third project to be undertaken for this Program after completion of the Almaden Valley Pipeline and the Pacheco Conduit inspection, repair, and rehabilitation.
In February and March of 2018, staff conducted a condition assessment of both Cross Valley and Calero Pipelines to evaluate and asses the overall condition of the pipelines and their appurtenances. The results indicate that several appurtenances have to be repaired or replaced.
On May 28, 2017, Cochrane Line Valve suffered a catastrophic failure. Staff quickly removed the defective 48-inch motor operated butterfly valve and installed a 48-inch fusion-bonded, epoxy-lined welded steel spool. Based on a check of flow capacity calculations for the Cross Valley Pipeline and known raw water demands, it was determined that the Cross Valley Pipeline had been operated above the Cochrane Line Valve design capacity, which caused the failure. As part of the Project, approximately 80 lineal feet of 60-inch pipe will be installed to replace the existing 48-inch and 54-inch piping. The new piping will allow a new 60-inch line valve to be installed to replace the failed valve.
Construction Contract Retention
Public Contract Code (PCC) Section 7201 limits 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 within a constrained shutdown schedule to minimize unplanned disruption in the delivery of raw water to Santa Clara County.
Previous Board Actions Related to this 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.
On January 8, 2019, the Board approved a sole source purchase of equipment and services from Pure Technologies U.S., Inc. to provide electromagnetic inspection, acoustic fiber optic (AFO) monitoring system, and AFO system services for the 10-Year Pipeline Inspection and Rehabilitation Program.
Permits
Staff has received a draft Lake-Stream Alteration Agreement from the California Department of Fish and Wildlife, and will finalize the Agreement by June 2019. Staff has also coordinated with the cities of San Jose and Morgan Hill, and the County of Santa Clara, and received conditional encroachment permits that will be finalized after award of contract to a construction contractor.
Next Steps
If the Board approves the recommendations, staff will proceed to advertise the Project for construction bids. Staff anticipates recommending the Board award a construction contract on July 9, 2019.
FINANCIAL IMPACT:
The total Project cost is estimated at $14.7 million and is included in the FY 20-24 CIP as part of the 10-Year Pipeline Inspection and Rehabilitation Program.
The estimated construction contract cost for the Project is between $8 million and $11 million. There are sufficient funds in the 10-Year Pipeline Inspection and Rehabilitation Program’s proposed FY20 budget to encumber the anticipated construction contract amount.
CEQA:
On November 13, 2007, the Board certified the Pipeline Maintenance Program Environmental Impact Report (PMP EIR) [Resolution 07-71]. The PMP provides for the maintenance of the District’s 14 raw water pipelines and 9 treated water pipelines.
In November 2018, District environmental staff reviewed the Project and concluded that the PMP EIR can be relied on by the District for this Project in a CEQA Internal Decision Memorandum. 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, California Department of Fish and Wildlife Lake-Stream Alteration Agreement, and Valley Habitat Plan’s conditions.
ATTACHMENTS:
Attachment 1: Notice to Bidders
Attachment 2: Project Delivery Process Chart
Attachment 3: Map
UNCLASSIFIED MANAGER:
Manager
Katherine Oven, 408-630-3126