Spill scheduled at W.A.C. Bennett and Peace Canyon Dams
Hudson’s Hope – The first prolonged release of water in a decade is scheduled to start Tuesday, June 26 from the W.A.C. Bennett Dam and Peace Canyon Dam near Hudson’s Hope. The two facilities will continue to generate power during this time.
The spill may continue, uninterrupted, until mid-August, dependent upon inflows into Williston Reservoir. BC Hydro’s Peace River facilities are designed to spill; it is considered to be a normal operation during the infrequent periods of excess inflows and water supply.
By spilling earlier, before Williston Reservoir is full, BC Hydro can release a smaller volume of water, minimizing the likelihood of a larger spill later on in the season. A spill of this size is not expected to cause flooding. Communities downstream of Peace Canyon Dam have been notified and should the spill operation change, BC Hydro will continue to keep communities informed. A similar spill was last observed in 2002.
The spill is a result of BC Hydro’s need to manage high system reservoir levels brought on by higher than average snowpacks and recent rainfall throughout the B.C. Interior. The inflow forecast for Williston is currently 125 per cent of normal for the remaining runoff season.
BC Hydro is expected to spill between 570 and 1,415 cubic metres per second (m³/s), (20,000 to 50,000 cubic feet per second) of water at both dams. Including the water used by the generating units, total discharge downstream of Peace Canyon Dam is expected to be between 2,150 and 3,000 m3/s (75,000 and 105,000 cfs). By comparison, the maximum normal discharge from Peace Canyon Dam is 1,982 m3/s.
BC Hydro may change the total downstream discharge, or end the spill without notice. For everyone’s safety, the public is reminded that they must stay well away from the spillway structures of either facility and may not stop on the W.A.C. Bennett Dam crest road to view the spill. Safe locations for public viewing of the spills are at the W.A.C. Bennett Dam Visitor Centre, or the Peace Canyon Dam Visitor Centre. Both facilities are open daily except Tuesdays through the Labour Day weekend.
Visit BC Hydro’s web site at www.bchydro.com
For more information please contact:
Bob Gammer, Community Relations