Hugh Keenleyside Dam (originally known as the High Arrow Dam) is a hydroelectric dam spanning the Columbia River, 12 km (6.5 miles) upstream of the city of Castlegar, British Columbia, Canada. The reservoirs behind the dam is named Arrow Lakes extending 232 km (144 mi) north to Revelstoke Dam, and contain 8.76 km3 (7.1 MAF) of reservoir volume. The dam is operated by BC Hydro.
The 853.4 m (2,800 ft) long earth fill and concrete dam was built as part of fulfilling Canada's role in the Columbia River Treaty, and was intended only to control the flow of water in the Columbia River for downstream dams. It was commissioned on October 10, 1968, six months ahead of schedule. A 185 megawatt (MW) powerhouse, the Arrow Lakes Generating Station, was added in 2002, it produces 772 GW.h annually. The station is owned by the Columbia Power Corporation.