Draft Study Plan Vol 1 (PDF) - Alaska Power and Telephone Company

DRAFT DOCUMENT
due to the proximity to the Chilkoot Bald Eagle Preserve and avalanche chutes
along Chilkoot Lake. Estimated lengths of various line segments are indicated below:
Table 3
Transmission Line Segment Lengths, miles
Line Type
Upper Powerhouse Lower Powerhouse
(Alts. 1, 2, and 3) (Alternative 4)
Buried cable adjacent to new
road in Chilkoot Valley.
0.3 0.1
Buried cable adjacent to
rehabilitated road in Chilkoot
8.8 7.1
Valley.
Buried cable adjacent to
highway along Lutak Inlet in
existing conduit
3.7 3.7
Total 12.8 10.9
Mode of Operation
3.0 PROJECT OPERATIONS
GLH expects to operate the Project solely for power generation, subject to the
constraints to be determined during licensing. Because GLH’s Upper Lynn Canal (ULC)
system is isolated with most existing generation from existing hydro units, the actual
mode of operation would depend on the system loads. The Connelly Lake Project would
be operated similarly to the Goat Lake project, with their generation varied as necessary
to maintain comparable storage levels. Either Goat Lake or Connelly Lake could be
operated in the lead position, with the other in lag if operated during the winter solely for
Haines and Skagway power.
If for some reason the submarine cable linking Haines and Skagway was out of
service, the mode of operation would be similar to that described above, except that the
Goat Lake and possibly the Kasidaya projects would not be available to meet Haines
loads. The Connelly Lake Project would be in lead position, supplying all Haines loads
in excess of those supplied by the Lutak, 10-Mile, and (possibly) Kasidaya projects.
During the summer months, Haines and Skagway are destinations for large cruise
ships. Currently, those ships run their on-board fossil-fuel generation systems to meet
their ship loads, which are substantial (7-12 MW, depending on the size of the ship). If
the installed capacity of the Project is sized appropriately, it would be possible to supply
power to at least one ship, as is currently done in Juneau. The Applicant will investigate
the feasibility of this type of operation, as it could have substantial benefits, as follows:
It would supply a revenue stream for the Project during the early years of
its operation when the native loads are modest.
Draft Study Plan – June 2012 p. 10 Connelly Lake Hydroelectric Project