Internal memo header for WTC No. 7 project, July 29

NYC 9/11 Public Portal Document .... ; ■ .

Fmwwi. Brlnckthoff New York. NY lOin 1OO QuaB»a * 212-613-5000 ELII rCANS Douglas, hae. ' hi Cnslnaon

July 9, 1986 A ) Planners Cablo: Parklap, Naw Ytirh Tal»x:BCA232117 . s El • . -i ■■

Mr. Magdi Farage P.E. . Chief, Division of Sewer Regulation and Control . 40 Worth Street Room 922 * New York, NY 10013 Re: Amtrak Tunnel Extension i Dear Mr. yarag:

, Amtrak has proposed to extend their existing single trackfromthe vicinity of 33rd Street to the vicinity of 38th Street by a ccmibination of a tunnel, open cut and at grade construction. The preliminary concepts for this re- \ location were prepared by others, and we are now preparing the contract documents for this extension. I

The proposed plan of the ®ctension, shown on Fig. 1, will require relocation of the combined sewers located in 33rd and 34th Streets along 11th Avenue. ■ i The tunnel grade at this location is about 13 ft. below the inverts of the existing sewers. Previous studies of this relocation by others, have indicated the use of a siphon to accomplish the relocation at both 33rd and 34th Streets.

We would appreciate reviewing with you existing swer information, the project configuarations, the?requirements for combined sewer relocations, the require— ments for use of a siphon and the submittals and repo.ts needed for approval of any proposed relocation. To implement this process, we suggest a brief meeting to provide an opportunity to exchange information and to set the stage for future formal submittals. To set this meeting please call me as soon al possible at (212) 613-5155 or Mr. ETez Sela at (2121 613-5159. We appreciate your cooperation in this most interesting and challenging project- ■i ....".-v.'--

Very truly yours, ' "

PARSONS BRINCKERHOF. U3E & DOUGLAS, INC-

Gepr^ Ry ^lige/, T I Assijetant Vice Pres [en It R E C E IV E D D.E.P./BUREAU OF SE’' rm JUL 11) W* I OMSIC*’ 1’ ^EWFR R a;

A Century of l^nglneerlng Excellence i- > 7/' NYC-WTC_000165760