Multiple bladder flood control system
Multipurpose automatic gate control
Muted tidal regulator
Natural bottom culvert and method for installation
Natural cue surface bypass collector
Navigational bypass, gate and pump device for use in water
Non-clogging debris and sediment removal facility
Non-clogging eaves trough
Non-vibrating collapsible dam
Ocean water drawing system
Offshore intake structure
Open bottom box culvert
Open-channel flow control system
Overflow spillway for dams, weirs and similar structures
Overflow spillway for dams, weirs and similar structures
Panel assembly for RCC dam and construction method
Passive method for obtaining controlled drainage from a vessel
Penstock
Penstock fish diversion system
Penstock fish diversion system