upbound, weir, fishway, johnboat, spillway, welland canal, cofferdam, tailrace, harbormaster, weighmaster, millrace, intracoastal waterway, river, waterway, forebay, lockage, gatun, oystering, bilge pump, oxbow, pontoon, inlet, bulkheads, trestle bridge, dam, locks, flowage, bighorn river, dike, docks, boaters, downbound, headrace, creek, portage, graving dock, bascule bridge, marina, surfman, navigational system, levee, dockhand, towboat, canal, drawbridge, erie canal, pilothouse, sawbill, scalloper, pier, saint lawrence seaway, seaway, wharf, gaillard cut, deckhand, truss bridge, bayman, cow pen, dredging, ouachita river, lake, st. lawrence seaway, flood plain, dulac, scow, atchafalaya, pilings, pumping station, boathouse, shoreline, barge, millpond, marsh, oppidan, eyot, foreman, trotline, floodplain, paddleboat, shoaling, riverfront, sny, laker, sluiceway, tombigbee river, lighthouse, boatyard, batture, hesper, bleachery, sandbag, shipfitter, tatums, waterline, coco plum, sandbars, silting, crabber, chyle, sternwheeler, tollhouse, penstock

skilled worker, trained worker

lockkeeper, lockman