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Main Title Development and evaluation of a rubber "duck bill" tide gate /
Author Freeman, Peter A. ; Forndran, A. B. ; Field, R.
Other Authors
Author Title of a Work
Forndran, Angelika B.
Field, Richard.
CORP Author Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab. ;New York City Dept. of Environmental Protection, Wards Island. ;Freeman (Peter A.) and Associates, Inc., Berlin, MD.
Publisher U.S. Environmental Protection Agency, Office of Research and Development, Risk Reduction Engineering Laboratory,
Year Published 1989
Report Number EPA 600/2-89/020
Stock Number PB89-188379
OCLC Number 708624682
Additional Subjects Tides ; Flood control ; Storm sewers ; Water flow ; Hydraulics ; Runoff ; Floodways ; Hydrology ; Gates(Openings)
Library Call Number Additional Info Location Last
ELBD RPS EPA 600-2-89-020 repository copy AWBERC Library/Cincinnati,OH 10/17/2014
NTIS  PB89-188379 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation x, 76 p. : ill., charts ; 28 cm.
Abstract A unique 54 in. diameter 'duckbill' rubber tide gate (RTG) was designed, fabricated, and installed in a typical New York City tide gate chamber. The operation of the RTG was observed over two years. The RTG was very effective in preventing the inflow of tidal waters and generally showed equal or improved performance compared to a typical flap gate. Hydraulically, the RTG was supposed to open to release storm flows at a positive difference in upstream head of 6 in. and to remain closed preventing inflow at a downstream positive head up to 8 ft. during high tide. Minor inflow was observed when debris was introduced into the RTG, and capability of self-cleaning was exhibited. Inflow would be significantly greater if similar size debris was lodged in the conventional flap-type gate. The maintenance crews observed no incident where the manual removal of debris was required. The existing chamber required minor modifications for the installation of the RTG.
Notes Cover title. "CR-80722." "Project officer, Richard Field." Includes bibliographical references (p. 74).
Place Published Cincinnati, Ohio
Supplementary Notes Prepared in cooperation with New York City Dept. of Environmental Protection, Wards Island, and Freeman (Peter A.) and Associates, Inc., Berlin, MD.
Corporate Au Added Ent Peter A. Freeman Associates Inc.; New York City Department of Environmental Protection.; United States. Environmental Protection Agency. Risk Reduction Engineering Laboratory. Water and Hazardous Waste Treatment Research Division.
PUB Date Free Form 1989
BIB Level m
Cataloging Source OCLC/T
OCLC Time Stamp 20110325122949
Language eng
Origin OCLC
OCLC Rec Leader 01213nam 2200289Ka 45020