U.S. GEOLOGICAL SURVEY
WATER-RESOURCES CONDITIONS IN NEW YORK
SEPTEMBER 2006
U.S. GEOLOGICAL SURVEY, WRD
New York District, Troy, NY
WATER RESOURCES REVIEW AND CURRENT CONDITIONS STATEMENT
FOR SEPTEMBER 2006
Prepared October 2, 2006
Troy--Summary Report
Provisional streamflow conditions at all sites monitored and included in this report in
eastern New York were in the normal to excessive range during September. Streamflow at
Schoharie Creek at Prattsville, East Branch Delaware River at Margaretville, West Branch
Delaware River at Walton, and Oquaga Creek at Deposit remained in the excessive range for
the fourth consecutive month. Streamflow at Wallkill River at Gardiner, Ramapo River at
Ramapo, and Beaver Kill at Cooks Falls increased into the excessive range after being in
the normal range last month. All other sites were in the normal range.
The total New York City reservoir system was at 90.8 percent of capacity on September 29;
normal for this period is 75.2 percent of capacity.
Ithaca--Summary Report
Provisional streamflow conditions at sites monitored and included in this report
for western New York were in the excessive range during September. Streamflow at
Susquehanna River at Conklin, Unadilla River at Rockdale, Chenango River near Chenango
Forks, Chemung River at Chemung, Fall Creek near Ithaca, and Oneida Creek at Oneida
continued to be in the excessive range for the fourth consecutive month. Streamflow at
Allegheny River at Salamanca, Cattaraugus Creek at Gowanda, Tonawanda Creek at Batavia,
Genesee River at Wellsville, and Flint Creek at Phelps continued to be in the excessive
range for the third consecutive month.
Coram--Summary Report
Mean flow at Connetquot Brook near Central Islip was in the normal range for the seventh
consecutive month.
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Provisional Data for September 2006
MEAN FLOW FOR SELECTED GAGING STATIONS
Period
of record Flow Percent
Station (to date) (cfs) Exceedence Conditions
01306460 Connetquot Brook nr Central Islip 1978 26.6 29 Normal
01312000 Hudson River at Newcomb 1925-87,2002 119 68 Normal
01318500 Hudson River at Hadley 1921 968 67 Normal
01321000 Sacandaga River nr Hope 1911 344 41 Normal
01334500 Hoosic River near Eagle Bridge 1910 410 30 Normal
01349150 Canajoharie Creek near Canajoharie 1993 23.3 33 Normal
01350000 Schoharie Creek at Prattsville 1902 337 17 Excessive
01357500 Mohawk River at Cohoes 1917 2,530 32 Normal
01371500 Wallkill River at Gardiner 1924 1,125 13 Excessive
01372500 Wappinger Cr nr Wappingers Falls 1928 128 25 Normal
01387400 Ramapo River at Ramapo 1979 175 12 Excessive
01413500 E Br Delaware River at Margaretville 1937 263 14 Excessive
01420500 Beaver Kill at Cooks Falls 1913 519 16 Excessive
01423000 W Br Delaware River at Walton 1950 481 14 Excessive
01426000 Oquaga Creek at Deposit **1941-73,2002 137 3 Excessive
01502500 Unadilla River at Rockdale 1930-95,2001 516 13 Excessive
01503000 Susquehanna River at Conklin 1912 2,290 14 Excessive
01512500 Chenango River nr Chenango Forks 1912 1,650 9 Excessive
01531000 Chemung River at Chemung 1903 4,780 2 Excessive
03011020 Allegheny River at Salamanca 1903 3,350 3 Excessive
04213500 Cattaraugus Creek at Gowanda 1940-98,2000 853 7 Excessive
04217000 Tonawanda Creek at Batavia 1944 186 10 Excessive
04221000* Genesee River at Wellsville 1916 368 7 Excessive
04230500 Oatka Creek at Garbutt 1945 139 6 Excessive
04234000 Fall Creek at Ithaca 1925 110 13 Excessive
04235250 Flint Creek at Phelps 1960-95,2002 174 5 Excessive
04243500 Oneida Creek at Oneida 1950 85.7 15 Excessive
04250750 Sandy Creek near Adams 1958-95,2002 78.8 30 Normal
04256000 Independence River at Donnattsburg 1942 73.7 65 Normal
04262500 W Br Oswegatchie R nr Harrisville 1916 179 48 Normal
04270200 Little Salmon River at Bombay 1958-95,2002 39.9 57 Normal
04275500 Ausable River at Au Sable Forks 1910-68,1990 238 64 Normal
** Statistics used based on record for 1941-1973 water years
* Includes 04221500-Genesee River at Scio (1916-72)
MONTHLY MEAN DISCHARGE FOR SELECTED STREAMFLOW STATIONS
Provisional Data for September 2006
INDEX OBSERVATION WELLS
The observation-well network generally reflects conditions in water-table sand and gravel aquifers and does
not necessarily reflect conditions in confined and bedrock aquifers. Water levels in S1810 have been affected
by changes in ground-water withdrawals or sewering. Water level in feet below land-surface datum unless site
noted with * which indicates reference to sea level or ** which indicates water level in feet above land-
surface datum. Statistics used for A-654(replacement) are from A-636 prior to 2003, for Cm-622(replacement)
are from Cm-46(adjusted) prior to 2003, and for U-1619(replacement) are from U-405(adjusted) prior to 2003.
Record Percent
County Well No. begins Date Water Level Exceedence Conditions
Albany A-654 2002 09/30 7.56 0 Excessive
Allegany Ag-261 2002 09/27 5.87 - --
Allegany Ag-262 2002 09/27 -0.51 - --
Broome Bm-128 1980 09/26 23.35 7 Excessive
Broome Bm-129 1985 09/26 67.65 24 Excessive
Cattaraugus Ct-121 1951 09/30 7.19 35 Normal
Cayuga Cy-223 2005 09/28 14.17 - --
Chautauqua Cu-10 1939 09/30 29.69 17 Excessive
Chemung Cm-622 2002 09/25 23.50 6 Excessive
Chenango Cn-12 1975 09/26 8.88 10 Excessive
Clinton Cl-145 1992 09/30 23.35 50 Normal
Clinton Cl-242 2006 09/07 3.02 - --
Columbia Cb-1071 2004 09/21 9.86 - --
Columbia Cb-1072 2006 09/21 9.17 - --
Cortland C-998 2002 09/28 5.31 - --
Delaware D-503 2002 09/30 5.86 - --
Dutchess Du-321 1948 09/30 68.67 22 Excessive
Dutchess Du-1009 1967 09/30 14.93 26 Normal
Erie E-1196 2004 09/30 12.30 - --
Essex Ex-150 2002 09/30 23.51 - --
Essex Ex-157 2006 09/26 18.00 - --
Franklin F-60 2005 09/30 3.55 - --
Franklin F-854 2005 09/30 32.99 - --
Fulton Fu-271 2002 09/30 14.71 - --
Genesee Gs-190 2002 09/27 33.97 - --
Greene G-644 2003 09/21 16.82 - --
Greene G-831 2006 09/21 6.34 - --
Hamilton H-3 1966 09/30 13.78 32 Normal
Herkimer He-627 2004 09/26 28.96 - --
Jefferson J-176 2005 -- -- - --
Lewis L-174 2002 09/30 24.14 - --
Livingston Lv-330 2004 09/28 11.89 - --
Madison M-178 1975 09/30 9.08 48 Normal
Monroe Mo-11 1984 09/27 8.09 27 Normal
Montgomery Mt-411 2004 09/25 33.82 - --
Niagara Ni-70 1973 09/30 3.69 1 Excessive
Niagara Ni-869 2003 09/30 0.43 - --
Oneida Oe-151 1926 09/30 24.19 12 Excessive
Oneida Oe-1457 2003 09/30 43.27 - --
Onondaga Od-1825 2004 09/28 13.20 - --
Onondaga Od-1833 2004 09/28 14.58 - --
Ontario **Ot-900 1955 09/27 7.48 34 Normal
Ontario Ot-1133 2002 09/27 3.08 - --
Orange O-2271 2002 09/30 6.46 - --
Orleans Ol-20 2004 09/30 21.33 - --
Oswego Ow-5013 2002 09/30 23.13 - --
Oswego Ow-5014 2002 09/30 23.47 - --
Otsego Og-23 1953 09/26 6.50 11 Excessive
Putnam P-1217 2005 09/30 14.67 - --
Rensselaer Re-703 1983 09/30 35.94 7 Excessive
Rockland Ro-18 1949 09/30 23.76 77 Deficient
Rockland Ro-543 2005 09/30 7.44 - --
St. Lawrence St-40 1953 09/30 8.01 58 Normal
St. Lawrence St-404 1958 09/30 15.73 82 Deficient
Saratoga Sa-1285 2002 09/30 2.64 - --
Schenectady Sn-730 2004 09/25 7.02 - --
Schoharie So-602 2005 09/22 27.21 - --
Schoharie So-604 2006 09/22 9.29 - --
Schuyler Sy-706 2003 09/28 7.45 - --
Seneca Se-532 2005 09/27 0.45 - --
Seneca Se-533 2005 09/27 -0.07 - --
Steuben Sb-472 1965 09/27 6.85 6 Excessive
Suffolk *S1810 1976 09/20 52.40 28 Normal
Suffolk *S1812 1982 09/21 48.97 4 Excessive
Suffolk *S4271 1946 09/18 13.22 3 Excessive
Suffolk *S5517 1948 09/07 44.93 1 Excessive
Suffolk *S8833 1951 09/30 18.39 3 Excessive
Sullivan Sv-535 2001 09/30 9.04 - --
Tioga Ti-891 2003 09/26 17.99 - --
Tompkins Tm-985 2005 09/28 4.35 - --
Tompkins Tm-1968 2005 09/28 16.07 - --
Ulster U-1619 2002 09/30 16.67 10 Excessive
Ulster U-1620 2005 09/21 28.57 - --
Warren Wr-80 2005 09/28 19.01 - --
Washington W-533 1974 09/30 7.41 66 Normal
Wayne Wn-592 2004 09/27 8.98 - --
Westchester We-5020 2003 09/30 13.58 - --
Wyoming Wo-4 1974 09/30 12.13 1 Excessive
Yates Ya-180 2004 09/28 3.73 - --
INDEX OBSERVATION WELLS
LAKES AND RESERVOIRS
Elevation & Storage at End of Month
Reservoirs (Storage in million cubic feet) Current Year Last Year Average
01314500 Indian Lake nr Indian Lake, NY 3,501 3,735 2,870
01323500 Great Sacandaga Lake at Conklinville 26,420 24,670 22,190
04295000 Richelieu River (Lake Champlain) at Rouses Point, NY - Elevation in ft
above sea level
September 30, 2006 95.56 September 30, 2005 95.29
Average (1939-2004) 94.88
Maximum daily 97.79 (1976) Minimum daily 92.91 (1941)
Provisional Data for September 2006#
INDEX STREAMFLOW STATIONS
(Reference period 1971-2000)
## Reference period is 1978-2000
** Excessive
# Note: Flow statistics based on data collected through September 30, 2006.
NOTES, DEFINITIONS, ETC.
Percent exceedence is, for example, the percentage of December monthly mean discharges for
period of record equal to or greater than the current December monthly mean discharge.
Statistics for the "Index Streamflow Stations" table are for the 30-year reference period
1971-2000. All other statistics used in report are based on the period of record at the site.
Median = 50th percentile, which means that, for the period of record included in the analysis,
50% of the values are greater than the median and 50% are less.
Deficient range = values below the 25th percentile - for the period of record included in the
analysis, 75% of the values are greater and 25% are less than this value.
Excessive range = values above the 75th percentile - for the period of record included in the
analysis, 25% of the values are greater and 75% are less than this value.
Normal range = values between the 25th and 75th percentiles.
