2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.979
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DEP siphon design hydraulic review letter, Jul 1987
Machine-extracted title · confidence 87%DEP Bureau of Sewers clarifies hydraulic review procedures and provides technical comments on proposed siphon design in tunnel.
NYC-WTC_000165365–000165370Folder label: “North Access Tunnel W. 33rd St. To w. 38TH ST”
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NYC 9/11 Public Portal Document \AME: .^dlcw (R)P: ( Ji. 1
Parsons, Brinkerhoff, Q’ o & .Douglas, Inc. July ]5, 198/ AMTRAK Page 2
4. e ’“Jew York Central Pail road p ns al.so include a reference to a 6" C.I. bouse sewer emanating fro in the north side of West .33 <d r C:: which is co ICC ted to t’;c existing 3’-0" X 4'-9” sewer in nst 33rd Ct..roet. 1 e elevation • jf this connection oust be ■ orfp 1 nod since it is crucial : > piion.
5. Since the existing sewer in West 34th Street is to be rerouted to the upstream end of the new siphon, the house connection elevations along West 34th Street .oast also be considered in relation to the hydraulic grade elevations along the siphon route. 6. Your attention should be drawn to the attached New York Central drawings in which it is shown that the existing 15" diameter pipe in 11th Avenue north of West 33rd Street oncers the 33rd Street sewer at a point approximately 5 feet downstream of the existing manhole. This point is at the same location as your proposed manhole No. 3.
7. As a result of recent discussions it is understood that your computations are being revised to reflect our comments regarding the apparent inadequacies in your computation of the hydraulic gradient difference between the upstream and downstream points of the siphon as shown in your January Sth submission. All the above issues roust be resolved satisfactorily before any hydraulic approval can be given for the submitted contract drawings. Sincerely,
Magdi Farag, P.E. Chief Div. of Sewer Regulation & Control Bureau of Sewers Enclosure cc DiMartino Fara ee Swedlow Suspense
MS/rfm Room 929
NYC-WTC_000165366
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NYC-WTC_000165366Source: NYC Law Department, mirrored locally
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Consultant submits meeting minutes documenting design resolutions and areas of agreement from July 2, 1987 coordination meeting.
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Internal memorandum inquiring whether the Bureau accepts the proposed siphon concept shown in the 60% submission drawings for the Westside Connection Project.
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000165403
Inter-office memorandum requesting hydraulic review of the proposed siphon in the Westside Connection Project.
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machine-extracted · confidence unavailable · Check page ↗2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.961
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DEP approval of final contract plans for tunnel project from W. 33rd to W. 38th Street with construction specifications.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.959
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000165384
Internal memorandum acknowledging receipt of 90% submission drawings for the Westside Connection Project and referencing hydraulic computations.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.958
machine-extracted · confidence unavailable · Check page ↗2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.957
machine-extracted · confidence unavailable · Check page ↗1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.957
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000165401
Inter-office memorandum inquiring if the proposed siphon concept in the 60% submission drawings is acceptable to the Bureau of Sewers.
1 shared topics · Same agency, volume and box · similarity 0.956
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000165405
Inter-office memorandum requesting review of hydraulic computations for the siphon and gravity sewer routing in the 60% submission.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.949
machine-extracted · confidence unavailable · Check page ↗Filed elsewhere
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