Ключевые слова: barrier, boating, canada, canal, chains, closed, concrete, dam, day, daylight, different, dock, docks, door, doors, drained, empty, flow, historic, historic site, holding, holding back, level, levels, locks, lockstation, low, mechanism, metal, no people, nobody, north america, ontario, ottawa, ottawa river, outdoor, outdoors, outside, reflective, retaining, retention, rideau canal, ripples, river, shut, sunny, water, water level, waterway, wheels,