Lake Dorothy Project is
located on the east bank of Taku Inlet, about 15 miles from
Except for 3.5 miles of its own transmission line, it utilizes a
portion of the Snettisham transmission line to bring electricity into
Water from Lake Dorothy
is used by taking advantage of the natural flow of water between Lake Dorothy,
– a stair-step set of lakes feeding into Dorothy Creek.
The side of Lake Dorothy
was tapped 143 feet below the lake’s surface.
This water flows through a 900 foot tunnel and through a large
valve into an outlet pipe used to control the amount of water released
to the natural drainage from Lake Dorothy into Lieuy
Lake where it then follows the natural
drainage into Bart
Lake, a 34 foot high dam
was constructed and water is diverted into a penstock to the power
house. The powerhouse houses
a 14.3 megawatt generator.
The project also includes a crew quarters and a substation.
A road was built from the powerhouse to access the Bart Lake
workings and for penstock installation.
The Lake Dorothy Project went
into operation on Aug. 31, 2009.
Dorothy's 14.3 megawatt turbine increases our
average yearly electrical
output by 20 percent.