OLS : Record


Main Title Development and evaluation of a rubber "duck bill" tide gate
Author Freeman, Peter A.; Forndran, A. B.; Field, R.
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 Risk Reduction Engineering Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Place Published Cincinnati, Ohio :
Year Published 1989
Report Number EPA 600/2-89/020
Stock Number PB89-188379
Subjects Tides; Flood control; Storm sewers; Water flow; Hydraulics; Runoff; Floodways; Hydrology; Gates(Openings)
Library   Call Number Additional Info Location Date Modified
NTIS PB89-188379 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation x, 76 p. ; 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 Final report: July 1981 - Jan 1986. Report date May 1989.
Supplementary Notes Prepared in cooperation with New York City Dept. of Environmental Protection, Wards Island, and Freeman (Peter A.) and Associates, Inc., Berlin, MD.
Author Added Ent
Forndran, Angelika.;
Field, Richard
PUB Date Free Form {1989}.
NTIS Prices PC A05/MF A01
BIB Level m
OCLC Time Stamp 19951128135418
Cataloging Source OCLC/T
Language ENG
Origin NTIS
OCLC Rec Leader 00845cam 2200217Ka 45020