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”
OCR status: ok · source: pdftotext
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_000165358
Inter-office memorandum requesting engineering review of final plans for the North Access Tunnel from W. 33rd to W. 38th Street.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.979
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Consultant submits meeting minutes documenting design resolutions and areas of agreement from July 2, 1987 coordination meeting.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.965
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000165399
Internal memorandum inquiring whether the Bureau accepts the proposed siphon concept shown in the 60% submission drawings for the Westside Connection Project.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.964
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000165403
Inter-office memorandum requesting hydraulic review of the proposed siphon in the Westside Connection Project.
1 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.962
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000165301
DEP approval of final contract plans for tunnel project from W. 33rd to W. 38th Street with construction specifications.
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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 ↗NYC-WTC_000165395
Department letter providing feedback on sewer relocation design drawings and elevation datum requirements.
2 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.957
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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
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NYC-WTC_000165358
Inter-office memorandum requesting engineering review of final plans for the North Access Tunnel from W. 33rd to W. 38th Street.
Similarity score 0.986 (not a probability)
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Department letter providing feedback on sewer relocation design drawings and elevation datum requirements.
Similarity score 0.956 (not a probability)
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000165377
Letter from DEP Bureau of Sewers regarding unreviseed drawings and as-built records for the tunnel project.
Similarity score 0.953 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000165358
Inter-office memorandum requesting engineering review of final plans for the North Access Tunnel from W. 33rd to W. 38th Street.
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NYC-WTC_000165289
Environmental Protection Department record related to tunnel project between W. 33rd and W. 38th Street.
Filed in the same folder
NYC-WTC_000165290
Letter enclosing a signed agreement between DEP and a contractor regarding sewer work in the vicinity of 11th Avenue.
Filed in the same folder
NYC-WTC_000165299
DEP legal correspondence regarding tunnel construction and sewer work in vicinity of 11th Avenue and W. 33rd Street.
Filed in the same folder
NYC-WTC_000165301
DEP approval of final contract plans for tunnel project from W. 33rd to W. 38th Street with construction specifications.
Filed in the same folder
Filed in the same folder