FOR IMMEDIATE RELEASE06-09
Notch at Gilboa Dam to Be Completed Tomorrow
Siphons to Be Tested Soon
Commissioner Emily Lloyd of the New York City Department of Environmental
Protection (DEP) announced today that the full 200-foot by 5.5-foot
notch at the Gilboa Dam is expected to be completed by tomorrow,
Saturday, February 18, pending weather conditions.
The notch is being removed from the western end of the dam to
help lower levels in the Schoharie Reservoir, to decrease the chance
of flooding, and to facilitate the installation of post-tensioned
anchoring cables as part of the DEP’s ongoing stabilization
project. The full notch builds on a smaller interim notch that
was cut out of the top of the dam last Saturday.
“I am enormously pleased that the notch has been completed
ahead of schedule. This significantly reduces the possibility
of a dam failure. I hope this will lessen the concerns of
area residents. I would like to thank the many people who
have worked very hard to accomplish this, including Jett Industries,
the contractor doing the work,” said Commissioner Lloyd.
Snow pack around the reservoir is virtually none, further decreasing
the chances of a large flood from snow melt that could compromise
the dam. A DEP snow survey on February 15 found the water
equivalent of the Schoharie Reservoir snow pack to be 300 million
gallons, only 3.4% of the 8.7 billion gallons of snow pack this
time last year. On January 2, 1996, the last snow survey
before the flood of record, the snow pack was 12.31 billion gallons.
The testing of the first two of four siphons at the dam will begin
on February 23. Each siphon will be able to remove 125 million
gallons a day (MGD) form the reservoir, for a total of 500 MGD
when all the siphons are installed by the first week of March. Combined
with the 575 MGD that is currently being diverted through the Shandaken
Tunnel, the siphons will raise the amount of water that can be
removed form the reservoir to over 1.1 billion gallons a day. The
maximum storage of the reservoir is around 19 billion gallons.