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File #: 21-0097    Version: 1 Name:
Type: Consent Calendar Item Status: Agenda Ready
File created: 1/20/2021 In control: Board of Directors
On agenda: 1/26/2021 Final action:
Title: Adopt Plans and Specifications and Authorize Advertisement for Bids for the Anderson Dam Tunnel Project, Project No. 91864005, Contract No. C0663 (Morgan Hill) (District 1).
Attachments: 1. Attachment 1: Notice to Bidders, 2. Attachment 2: Project Delivery Process Chart, 3. *Supplemental Agenda Memorandum, 4. *Supplemental Attachment 1: Notice to Bidders, 5. *Supplemental Attachment 2: Non-Disclosure Agreement
BOARD AGENDA MEMORANDUM


SUBJECT:
Title
Adopt Plans and Specifications and Authorize Advertisement for Bids for the Anderson Dam Tunnel Project, Project No. 91864005, Contract No. C0663 (Morgan Hill) (District 1).


End
RECOMMENDATION:
Recommendation
A. Adopt the plans and specifications and authorize advertisement for bids for the construction of the Anderson Dam Tunnel Project (Project), per the Notice to Bidders, exclusively to the list of Valley Water pre-qualified bidders; and
B. Authorize the Designated Engineer to issue addenda, as necessary, during bidding.


Body
SUMMARY:
Santa Clara Valley Water District (Valley Water) is undertaking the Anderson Dam Federal Energy Regulatory Commission Order Compliance Project (FOCP) as a result of the February 20, 2020 directive from the Federal Energy Regulatory Commission (FERC) to implement interim risk reduction measures at Anderson Dam. One of those measures is the Anderson Dam Tunnel Project (ADTP).

The ADTP will construct a diversion system to augment the existing outlet, which will consist of a new diversion tunnel, an outlet structure, a micro-tunnel lake tap, and modifications to Coyote Creek just downstream of the base of the dam. The Project also includes reservoir bank and rim stability improvements and existing intake structure modification.
The diversion system will consist of a 23-ft diameter approximately 1,450-ft long tunnel, will be able to pass releases from the reservoir at flow rates up to 2,000 cubic feet per second (cfs). The new outlet structure will be used to control flows through the tunnel which will go through dissipation chambers and will be discharged into a rip-rap lined channel, before entering the Coyote Creek. Modifications to Coyote Creek just downstream of the base of the dam will be made to accommodate the higher flows from the tunnel.
Staff is recommending the Board approve the Project's final plans and specifications and authorize staff to advertise for construction b...

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