Completion of Tail Tunnels – Preliminary Estimates

Completion of Tail Tunnels – Preliminary Estimates

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360 W 31st Street 7th Floor New York, NY 10001 212-216-8500 Fax: 212-216-8528 September 24, 2009 Letter: S3II-MTA-L-00170 MTA New York City Transit 2 Broadway, Room C19.11 New York, NY 10004 Attention: Mr. Paul Matthews Construction Manager Reference: No. 7 Line Extension Contract No. C-26503 Subject: Completion of Tail Tunnels – Preliminary Estimate Dear Mr. Matthews: In response to discussions held at the September 2, 2009 Executive Meeting, S3II has prepared a preliminary estimate for completion of the CC1 and CC2 Tail Tunnels to their ending station per the contract design documents. This estimate is preliminary in scope and may be revised upon completion of the horizontal drilling to be installed from both tunnel faces, and the corresponding design of the ground support system. The preliminary estimate is based on the following assumptions: Length of tunnel to complete - CC1 – 21.3 LF - CC2 – 22 LF CC2 Heading - Completion of CC2 is currently be evaluated based on information obtained from
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This note was uploaded on 07/14/2011 for the course MNCM 201 taught by Professor Sara during the Spring '11 term at Keller Graduate School of Management.

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Completion of Tail Tunnels – Preliminary Estimates

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