spillway, sluice, dam, flood, spigot, levee, weir, backflow, dike, gates, door, drawbridge, bridge, dredge, cofferdam, torrent, sluiceway, drain, reservoir, lockmaster, anicut, st. lawrence seaway, fishway, deluge, forebay, tidal wave, canal, sinkhole, seawall, valves, drainage basin, culvert, flow, funnel, seep, flume, outfall, breakwater, loopholes, causeway, transom, overtopping, drainpipe, fissure, manhole, gush, trickle, jetties, backdoor, atchafalaya, tributary, bypasses, diversion, loop, pedestrian bridge, bayou, crossings, waterway, floodwater, inflow, silting, revetments, river, federalizing, chasm, floodwaters, canalisation, overflows, sandbag, swamping, barrier, gaillard cut, barrages, reservior, bailey bridge, welland canal, mouths, frontiers, contraflow, seepage, tollbooth, zambezi river, crest, oxbow, caernarvon, damns, expressway, lagoon, worms, pontoon bridge, batture, gap, leakage, pumping station, bulkheads, interchange, soakaway, millrace, ramps, sumps, aswan dam, parallelogram, raft, tempest, whirlwind, bin, bog, crib, cube, enclosure, gorge, horseshoe, inclosure, panels, parenthesis, patch, patio, pedestal, playground, rectangle

penstock, sluice, sluiceway

dam, dike, levee, regulator

head gate, penstock, sluice valve, sluicegate, water gate