DEP letter re tunnel project drawings, July 1987

NYC 9/11 Public Portal Document

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6. There is no 15" D. 1 pipe. It should be 16" D.l. It is advised that it with push-on joints on concrete cradle. 7. All sewers in the area are combined sewers and should be labeled as such.

8. Show the size of the house connection from manhole No. 7 to the flow adopter --..Ci er. The 8" connection from the reservoir to manhole No.l should not be should be straight. In case this flow is through a force main, a pressure red;:;' will be required before being discharged into manhole ^1 as discussed in the on July 2, 1987.

g. Use standard N.Y.C. D.E.P. catch basins instead of inlets. Show type of catch uz It is preferable not to use more than two catch Iosins in series as shown on ch No. C-13.

10. Delete profile for catch basin connections and house connections. Invert eic' for the proposed catch basins shall be determined in the field and as such sncuio not be shown on the plans.

11. The profile for the proposed sewers as shown on drawing No.S-32 must be Cr' in accordance with D.E.P, standards. Jt must show type of manholes, type c, \ ; distance between manholes, slope, size, surface elevation, cover, bedch.; All profiles must be drawn with a vertical scale such that the information/c can be properly interpreted. Die scale l"=10'is too small. 12. Drawing Nos.S-33, S-34, S-35, S-36, S-60, S-61 and S~62 can not be chs no structural computations per comment No.lJ of our letter dated April . have been submitted to this office. 13. Comply with comment Nos. 5,9,12 and 13 of our letter dated April 25, \ you. 14. All sewers having cover of less than 4.0’ need to be encased or sukmii st; computations that the proposed severs can take the lood ct the propose; of less than 4.0'. IS. Submit easement and maintenance agreements.

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