Project Details

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Results Chart for Delivery Method and Financing

Delivery Method

# of Projects: 1
100% of the Results

Background informationProject Created: February 23, 2010

Project Name: Caldecott Improvement Project
Year in Operation:
Sector: Transportation
Subsector: Tunnel, Roads
Status: Design / Construction
Type: New Facility
Description: This project is to add a Fourth Bore to the three existing Caldecott highway tunnels located on State Route 24 in Northern California. Route 24 passed through the Berkeley hills, connecting Oakland and Orinda. The Fourth Bore will be approximately 3,400 feet long, 50 feet wide, and 32 feet high. After excavation, a waterproof membrame will be placed, followed by construction of a cast-in-place reinforced concrete lining.
Delivery Method as described in the country where it's located: Design Bid Build
Is the project still active: Yes
Comments: The project passes through weak rock and unstable fault zones, and will likely be built using the new Austrian Tunneling Method.

Project Locations

Address: 193 Caldecott Ln
City: Oakland
State: California
Country: United States of America

Address: 21 Old Tunnel Rd
City: Orinda
State: California
Country: United States of America

Souces of Project Support (Non-monetary)

Checkbox Checked Access to Land: This is the fourth bore through the Berkeley Hills, adjacent to three previous tunnels. The ROW and the site are already controlled by the government.

Souces of Project Support (Monetary)

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From Public (Government) Sources to Producers: Estimated cost as of late 2009 is $420 million, all of which is financed through federal, state, and regional funds. The budget includes the Fourth Bore, Kay Street improvement, Route 24/Hwy 13 Ramp Realignment, and a future landscaping project, and includes environmental clearance, design, right of way and construction costs. A construction contract was let prior to final design completion. The project received substantial Recovery Act funding as a shovel ready project.

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Direct Cash Support

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From Public Sponsor of Project - Direct Expenditure of Appropriated Public Funds: County Funding: $122.8 million, Contra Costa County Measure J -- 1/2 cent sales tax

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From Other Public Entities - Direct Grant of Appropriated Public Funds: Federal Grants: $1.4 million SAFETEA-LU program; $197.5 million, American Recovery Reinvestment Act; State Grants: $20 million, TRCP (Traffic Congestion Relief Program) 17.3 million, State Transportation Improvement Program (STIP) $11 million, Corridor Mobility Improvement Account (CMIA) funds from Prop 1B, passed by California voters in Nov 2006 to allow the state to issue bonds to finance large-scale transportation projects. Regional Measure 2 $50 million, Raised the toll on seven Bay area state-owned bridges from $3 to $4.

Project Delivery & Finance Method

Project Delivery:
All Public Finance. Public Sponsor contracts for initial design, and separately contracts for initial construction. Public Owner operates and maintains the resulting facility.
Construction Manager At Risk Variants: Public Sponsor contracts with Construction Contractor after Design is Complete.

Procurement Approach

Project Component
Based Selection
Request for
Request for
for Bids

Term for Key Components & Forms of Contract

Project Component
Initial Design and Construction
The construction contract was let before final design complete. Not sure what the format of the contract is. 

Project Value (If and As Known)

Date of Estimated Project Value: November 1, 2009
Project Value
Hard Cost
Hard & Soft Costs
$10-25 Million US
$250 Million - 1 Billion US
$200-500 Million US


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