Glen Canyon Updated October 9, 1997
Inflows to Lake Powell were 216 percent of normal in
September and are expected to be about 150 percent of
normal in October.
Glen Canyon Dam average daily releases are continuing
at about 20,000 cfs and will likely remain at this
level through the end of the calendar year. Hourly
flows are currently ranging from about 17,000 cfs to
23,000 cfs, with lower average flows on the weekends
(15,000 to 18,000 cfs). Lake Powell inflows are
continuing much above normal at about 19,000 cfs. With
these projected releases, we expect Lake Powell storage
to be about 21.5 MAF by the end of December 1997, about
0.5 MAF lower than usual in an effort to provide some
buffer against ongoing El Nino effects.
Discussions are continuing regarding the 2-day 31,000
cfs powerplant release intended to move recent Paria
River sediment inputs to the beaches and side channel
areas. A transformer bus failure from a lightning
storm which has idled 2 generators will require some
repair work to allow full powerplant capacity to be
released. At this time we are delaying the high
release; tenatively it is being scheduled for October
21 - 22, 1997, but it could be delayed yet another week
after that. This message will regularly updated on our
website in an effort to keep everyone informed.
The Colorado River Management Work Group meetings to
discuss the 1998 Annual Operating Plan for the entire
Colorado River have concluded with a consultation
meeting on July 29, 1997. We expect the 1998 AOP to be
issued by the Secretary of the Interior in the near
future. Technical subteam meetings are continuing to
evaluate the implications of alternative surplus
determination guidelines. For further information
contact Randall Peterson at (801)524-3715 or Jayne
Harkins at (702)293-8190.
Carl Anderson
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