than 14-inches of rain fell in a small area of southeastern
Sussex and northwestern Morris County in northwestern
New Jersey during August 11-14, 2000.
peaks at some U.S. Geological Survey gauging stations
on Lake Hopatcong, Musconetcong River, Green Pond
Brook, Rockaway River, and Russia Brook tributary
were the highest ever recorded.
2,700 homes and businesses in Sussex, Morris, Warren
and Hunterdon Counties were flooded, and about 2,600
people were evacuated.
bridges, dams, and roads were damaged or destroyed.
Damage was estimated at $179 million, and Sussex
and Morris Counties were declared Federal Disaster
Areas. (Courtesy U.S.G.S. Fact Sheet FS-104-01,
areas hit most severely were in Sussex and Morris
Counties, with the storm centered over the townships
of Sparta, Hopatcong and Jefferson. A total of four
dams completely failed as a result of the ensuing
rain gauges from the New Jersey Automated Flood
Warning System (AFWS), under the National Weather
Service (NWS) reported rainfall data of 5.67 inches
and 8.49 inches for West Wharton and Berkshire Valley
respectively. These readings were taken over a 24-hour
duration from 8:00 AM, Saturday, August 12, 2000
to 8:00 AM, Sunday, August 13, 2000. Preliminary
rainfall data from the Passaic Flood Warning System
reported rainfall gauge recordings of 18.65 inches*
and 14.11 inches* for Jefferson Township and Sparta
Mt. respectively. See
graphical display of rainfall.
a result of the flooding, the Dam Safety Section
dispatched emergency inspection teams, consisting
of section engineers, to assess damages and hazards
associated with the area dams. Engineers conducted
preliminary inspections of the entire impacted area
on Sunday, August 13, 2000. Beginning on Monday,
August 14, 2000 and ending on Thursday, August 17,
2000, teams were sent to specific areas to conduct
more detailed investigations of all affected dams.
NJDEP Dam Safety Section inspected over 50 dams
to assess the impact of the storm. To date, the
Section documented complete failure of four dams
and notable damage to an additional 26 dams. The
following table identifies the dams that were damaged
by the storm: