Alaska Electric Light and Power Company plans to close its Snettisham Hydroelectric dam for two days in late August to install an avalanche diversion at power line tower 4-5.
Greens Creek, Princess Cruise Lines and dual fuel customers, all interruptible customers, will be taken offline, according to an AEL&P press release.
The shutdown will require use of the power company’s standby diesel generators. AEL&P has already added the estimated fuel costs to its current Cost of Power Adjustment included on a customer’s bill. Conservation efforts or a reduced outage time could save diesel generator use. Any savings or additional costs associated with diesel usage will be factored into the next quarter’s Cost of Power Adjustment.
Tower 4-5 is located along mile four of the power lines that run from Snettisham to the Taku Inlet. AEL&P plans to bring material to the site by heavy lift helicopter. Work on the diversion began in May and continues to Oct. 1.
A similar avalanche diversion was installed at tower 4-6 in 2009. The diversion protected the tower during an avalanche in March (goo.gl/ezz68).