FOR IMMEDIATE RELEASE06-10
February
28, 2006
Contact:
Ian Michaels
(718) 595-6600
New
Rain-Based Spill Control Program at Pepacton and Neversink
Reservoirs
Commissioner Emily Lloyd of the New York City Department
of Environmental Protection (DEP) today detailed a new spill control
program for the Pepacton and Neversink reservoirs that is based
on potential runoff from rainfall. The new program is in
addition to the existing snow pack program at the same two reservoirs.
Under the new program, voids will be maintained
in both reservoirs large enough to completely capture the expected
runoff from a one-inch rain storm occurring over a six hour period. With
both the runoff and snow pack programs in effect at the same time,
the program that would create the larger void would take precedence.
“This new rainfall program provides an extra
layer of protection for downstream residents for times when the
snow pack is low, as it is this winter,” said Commissioner
Lloyd. “Instead of basing voids only on snow pack
we now have the ability to use projected runoff from a defined
weather event. The DEP crafted this program out of concern
about downstream locales and was able to gain the approval of all
the parties to the 1954 Supreme Court decree for its implementation.”
Runoff projections are continuously updated for both
reservoirs by the National Weather Service. Both the snow
pack and runoff programs will be maintained until March 31.
Assembly Member Aileen Gunther (98th Assembly District)
said, “This release program is a positive step to minimize
the tragic flooding that occurs downstream of the Neversink Dam. The
next step is to extend and expand this program. Additionally,
I am working on legislation that would enable federal water management
experts to look at the process in place and make recommendations
on how New York City’s reservoir system can be operated to
minimize the horrendous impact of seasonal flooding in the Catskills
region.”
Under the snow pack program, voids are maintained
in the Pepacton and Neversink reservoirs equal to the water equivalent
of half the melted snow pack surrounding each reservoir. The
National Weather Service, DEP and the State DEC all help to estimate
the water equivalent of the melted snow packs.
Release rates are established daily in consultation
with the Delaware River Master, and restrictions on the runoff
program are the same as for the snow pack program. Releases
will be suspended when downstream flood gauges reach two feet below
flood stage or are projected to reach that point within 48 hours. Ice
conditions in flood prone areas can also cause releases to be halted. Releases
will also be suspended if the spill plus the releases from the
Neversink Reservoir exceed 750 cubic feet per second (cfs), or
2000 cfs from Pepacton. These guidelines are subject to modification
based on conditions.
The flood stage for the East Branch of the Delaware
River is 13 feet as measured by the gauging station at Fishs Eddy. Flood
stage for the Neversink River at Bridgeville is 8 feet.
Releases from the City’s Delaware River reservoirs
are directed by Delaware River Master in accordance with a 1954
Supreme Court decree. Releases can also be dictated by the
DEC in accordance with the DRBC experimental fisheries program. The
DEP cannot take unilateral action to increase or decrease the downstream
releases from the City’s Delaware River reservoirs and must
secure the approval of all the Delaware River states for any release
modifications.