Veresen has three run-of-river projects in operation. Furry Creek and Clowhom located in British Columbia sell electricity to BC Hydro under long-term purchase agreement. Glen Park, located in upstate New York, sells all of its output at prevailing market terms on a month-to-month basis.
Veresen has an additional run-of-river project located in British Columbia. Dasque-Middle is under construction with commercial in-service projected for 2013.
|Furry Creek||To 2024||11||99%|
|Clowhom||To 2034||2 x 11||100%|
|Dasque Middle1||To 2053||20||100%|
1 COD – 2014
How run-of-river hydroelectric works
Run-of-river hydroelectric technology uses the natural flow of water from a river to produce electricity. It has no associated large dam or reservoir. Run-of-river hydroelectric projects are dramatically different in design, appearance and impact from conventional hydroelectric projects. There are two main differences. First, there is no water storage other than the limited amount required to submerge the intake pipe. Second, there is no alteration of downstream flows, since all diverted water is returned to the stream below the powerhouse.
In run-of-river hydroelectric, a portion of the river’s flow is diverted to a powerhouse before the water is returned to its natural watercourse. The water reaches the powerhouse through a tunnel or penstock, which drops from the intake. Once the water reaches the powerhouse, it is at a very high pressure and is directed into a turbine before it is fed back into the river. The power generated is connected to a local power grid through a high voltage transmission line.
The environmental “footprint” of run-of-river facilities is typically considered lower-impact when compared to large scale hydroelectric facilities that have large water storage reservoirs. With no large dam to alter the river’s flow, the design attempts to mitigate the environmental concerns traditionally associated with commercial dam-based hydroelectric projects.