An item first published in August 2011, repeated because it demonstrates that small hydro power projects are not benign.
A regular reader informs me (and people in the msm) about issues surrounding IPP’s. In a message today, he says many things worth repeating and this is only one:
“The run of river IPP’s are not run of river. Many of them are drain the alpine lake IPP’s. Tyson Lake is a prime example.
Sunshine Coast IPP shut down over fisheries fears, Scott Simpson, Vancouver Sun, May 2010:
…The proponents are seeking relief from federal water pollution laws, as applied under the Fisheries Act, while stream-keeper groups suggest a resumption of power generation at Tyson Creek generating facility will harm fish populations downstream in the Tzoonie River.
The Tzoonie is located at the head of Narrows Inlet east of Sechelt peninsula, and supports both spawning and rearing populations of salmon and migratory trout.
…The facility’s problems first came to light in mid-January , shortly after it was commissioned and for the first time began shipping electricity to BC Hydro.
The facility was designed to draw water from the bottom of Tyson Lake, a small, barren alpine lake at 3,000 foot elevation, and pipe it downhill to a generating station in Tyson Creek. The creek flows into Tzoonie River, which is used by salmon.
Within a few weeks of beginning operations, the facility began releasing cloudy water into Tyson Creek — suggesting that a disturbance had taken place under the ice-covered surface of Tyson Lake and caused a large release of silt into the lake. It appears that drawing down the lake for power generation caused the surface ice to scour a delta situated at one end of the lake.
The cloudy, or turbid, water was observed in the Tzoonie River and all the way out to the river’s estuary in Narrows Inlet…