May 23, 2001

CONTRACT NO. 04-045024
San Mateo Bridge
Mini-Toll Plaza

The responses to contractors' inquiries, unless incorporated into a formal addenda to the contract, are not a part of the contract and are provided for the contractor's convenience only. In some instances, the question and answer may represent a summary of the matters discussed rather than a word-for-word recitation. The responses may be considered along with all other information furnished to prospective bidders for the purpose of bidding on the project. The availability or use of information provided in the responses to contractors' inquiries is not to be construed in any way as a waiver of the provisions of section 2-1.03 of the Standard Specifications or any other provision of the contract, the plans, Standard Specifications or Special Provisions, nor to excuse the contractor from full compliance with those contract requirements. Bidders are cautioned that subsequent responses or contract addenda may affect or vary a response previously given, and any such subsequent response or addenda should be taken into consideration when submitting a bid for the project. Inquiries submitted within seventy-two (72 ) hours of the bid opening date might not be addressed.

The Caltrans District 4 Office is located at 111 Grand Avenue, Oakland, CA 94612. The mailing address is P.O. Box 23660, Oakland, CA 94623-0660. The Toll Bridge Program Duty Senior telephone number is (510) 286-5549, the email address for Contractor's inquiries is, and the fax number is (510) 286-4563. All inquiries must include the contract number.

1) Page 24 of the specials 5-1.14 Sound Control Requirements.

The paragraph indicates that pile driving cannot occur between the hours of 9PM and 7AM.

Can this section be modified to allow pile driving at night with restrictions on noise levels? The pile driving for the lane 8 extension occurred in the same area at night. We do not believe that there is a safe buffer zone to drive piles during the day, in addition driving on weekends with a lane closure would create large traffic back-up, recently we have encountered weekend back-up to Hwy 880 these occur simply by closing one or two booths, a full lane closure would have a much greater impact.

We request that pile driving be allowed between 7PM and 6PM Monday thru Friday.

Bid according to the plan & specifications.