15 August 2002
Opening Elevations. No standardization can be established for opening
elevations since these depend on tidal ranges, stem rises of gate valves, and proximity
and character of entrance approach bottoms. In general, depths below mean low water,
where opening soffits are placed, should not be less than opening heights, and in no
case so high that the rising stems of sluice gates project above the coping. When an
entrance approach bottom is near the invert or openings, protect the bottom area in
front of and adjacent to the openings from erosion by heavy rip-rap or other means.
Trash Racks. Place trash racks over openings to prevent intake of solid
matter. Trash racks must be removable for maintenance and replacement. For trash
rack design, refer to MIL-HDBK-1005/7 Water Supply Systems.
Stop Logs. Between trash racks and sluice gates, provide vertical slots in
culvert sides to accommodate stop logs furnished to shut off the water for sluice gate
. Control graving dock flooding with sluice gates. Provide
two sluice gates per flooding opening to assure "double valve protection" against
Minimum Design. When under heavy hydrostatic pressures occurring
during high tide levels with wave action, design must be adequate to prevent operating
and maintenance troubles caused by distortion, warping, and excessive friction.
Maximum Design. Design maximum sluice gate sizes to allow flooding a
dock within the specified time.
Design for Two-Way Pressure. When sluice gates are subjected to two-
way pressure, they must be specifically designed for such service.
Limit the largest dimension to 2.44 m (96 in.)
Use motor operated, reversible, rising stem type gates. Operate motors
by 3-phase, 60 Hertz current in the 440-volt to 460-volt range.
Provide local mechanical gate position indicators at gate stands, and
remote electrically operated indicators at pumpwell control boards.
Design structural supports for gate lifting mechanisms to carry a load two
times the manufacturer rated lifting force.
Suitable cast iron thimbles must be embedded in concrete for attachment
of sluice gate frames.
Use cast iron frames and covers. Use stainless steel metals (31OSS -
316SS) for stems and stem couplings. Use bronze for the thrust nuts and