U.S. GEOLOGICAL SURVEY
WATER-RESOURCES CONDITIONS IN NEW YORK
APRIL 2006
U.S. GEOLOGICAL SURVEY, WRD
New York District, Troy, NY
WATER RESOURCES REVIEW AND CURRENT CONDITIONS STATEMENT
FOR APRIL 2006
Prepared May 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 deficient range during April. Streamflow at
Hoosic River near Eagle Bridge, Schoharie Creek at Prattsville, Mohawk River at Cohoes,
Ramapo River at Ramapo, East Branch Delaware River at Margaretville, Beaver Kill at Cooks
Falls, and West Branch Delaware River at Walton remained in the deficient range for the
second consecutive month. The lowest provisional period-of-record (42 years) minimum
monthly mean discharge for April was recorded at Sandy Creek near Adams.
The total New York City reservoir system was at 96.6 percent of capacity on May 1;
normal for this period is 100.0 percent of capacity.
Ithaca--Summary Report
Provisional streamflow conditions at sites monitored and included in this report
for western New York were all deficient during April. Streamflow at Susquehanna River
at Conklin, Unadilla River at Rockdale, Chenango River near Chenango Forks, Chemung
River at Chemung, Allegheny River at Salamanca, Genesee River at Wellsville, Fall Creek
near Ithaca, and Flint Creek at Phelps continued to be in the deficient range for the
second consecutive month.
Coram--Summary Report
Mean flow at Connetquot Brook near Central Islip was in the normal range for the second
consecutive month after being in the excessive range for five consecutive months.
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Provisional Data for April 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 33.8 49 Normal
01312000 Hudson River at Newcomb 1925-87,2002 1,010 68 Normal
01318500 Hudson River at Hadley 1921 5,230 92 Deficient
01321000 Sacandaga River nr Hope 1911 2,350 90 Deficient
01334500 Hoosic River near Eagle Bridge 1910 1,030 95 Deficient
01349150 Canajoharie Creek near Canajoharie 1993 146 66 Normal
01350000 Schoharie Creek at Prattsville 1902 501 93 Deficient
01357500 Mohawk River at Cohoes 1917 8,410 84 Deficient
01371500 Wallkill River at Gardiner 1924 1,100 75 Normal
01372500 Wappinger Cr nr Wappingers Falls 1928 320 73 Normal
01387400 Ramapo River at Ramapo 1979 152 76 Deficient
01413500 E Br Delaware River at Margaretville 1937 418 83 Deficient
01420500 Beaver Kill at Cooks Falls 1913 595 96 Deficient
01423000 W Br Delaware River at Walton 1950 912 76 Deficient
01426000 Oquaga Creek at Deposit **1941-73,2002 95.9 94 Deficient
01502500 Unadilla River at Rockdale 1930-95,2001 1,050 88 Deficient
01503000 Susquehanna River at Conklin 1912 4,380 88 Deficient
01512500 Chenango River nr Chenango Forks 1912 2,390 95 Deficient
01531000 Chemung River at Chemung 1903 2,600 94 Deficient
03011020 Allegheny River at Salamanca 1903 2,730 98 Deficient
04213500 Cattaraugus Creek at Gowanda 1940-98,2000 771 96 Deficient
04217000 Tonawanda Creek at Batavia 1944 210 96 Deficient
04221000* Genesee River at Wellsville 1916 509 84 Deficient
04230500 Oatka Creek at Garbutt 1945 226 94 Deficient
04234000 Fall Creek at Ithaca 1925 168 98 Deficient
04235250 Flint Creek at Phelps 1960-95,2002 74.4 97 Deficient
04243500 Oneida Creek at Oneida 1950 195 82 Deficient
04250750 Sandy Creek near Adams 1958-95,2002 283 100 Deficient
04256000 Independence River at Donnattsburg 1942 328 89 Deficient
04262500 W Br Oswegatchie R nr Harrisville 1916 808 91 Deficient
04270200 Little Salmon River at Bombay 1958-95,2002 158 90 Deficient
04275500 Ausable River at Au Sable Forks 1910-68,1990 1,360 79 Deficient
** 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 April 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 04/26 5.99 8 Excessive
Allegany Ag-261 2002 04/25 4.70 - --
Allegany Ag-262 2002 04/25 -0.62 - --
Broome Bm-128 1980 04/30 24.06 79 Deficient
Broome Bm-129 1985 04/30 67.97 77 Deficient
Cattaraugus Ct-121 1951 04/30 6.00 79 Deficient
Cayuga Cy-223 2005 04/27 13.57 - --
Chautauqua Cu-10 1939 04/30 18.43 43 Normal
Chemung Cm-622 2002 04/30 23.27 67 Normal
Chenango Cn-12 1975 04/25 7.05 26 Normal
Clinton Cl-145 1992 04/30 22.74 84 Deficient
Columbia Cb-1071 2004 04/19 9.97 - --
Cb-1072 2006 04/28 8.21 - --
Cortland C-998 2002 04/27 4.84 - --
Delaware D-503 2002 04/30 4.33 - --
Dutchess Du-321 1948 04/30 67.34 18 Excessive
Dutchess Du-1009 1967 04/30 13.40 65 Normal
Erie E-1196 2004 04/30 12.26 - --
Essex Ex-150 2002 04/30 17.18 - --
Franklin F-60 2005 04/30 3.32 - --
Franklin F-854 2005 04/30 95.77 - --
Fulton Fu-271 2002 04/21 14.55 - --
Genesee Gs-190 2002 04/27 26.16 - --
Greene G-644 2003 04/13 10.80 - --
G-831 2006 04/13 6.04 - --
Hamilton H-3 1966 04/30 11.40 38 Normal
Herkimer He-627 2004 04/21 28.82 - --
Jefferson J-176 2005 04/25 1.39 - --
Lewis L-174 2002 04/25 22.07 - --
Livingston Lv-330 2004 04/27 9.51 - --
Madison M-178 1975 04/30 7.51 85 Deficient
Monroe Mo-11 1984 04/27 8.09 73 Normal
Montgomery Mt-411 2004 04/21 32.99 - --
Niagara Ni-70 1973 04/30 3.28 94 Deficient
Niagara Ni-869 2003 04/30 0.91 - --
Oneida Oe-151 1926 04/30 20.67 76 Deficient
Oneida Oe-1457 2003 04/30 42.92 - --
Onondaga Od-1825 2004 04/27 11.98 - --
Onondaga Od-1833 2004 04/27 13.37 - --
Ontario **Ot-900 1955 04/27 8.29 82 Deficient
Ontario Ot-1133 2002 04/27 2.67 - --
Orange O-2271 2002 04/30 6.33 - --
Orleans Ol-20 2004 04/30 19.73 - --
Oswego Ow-5013 2002 04/30 22.81 - --
Oswego Ow-5014 2002 04/30 23.30 - --
Otsego Og-23 1953 04/25 4.94 33 Normal
Putnam P-1217 2005 04/18 13.56 - --
Rensselaer Re-703 1983 04/19 35.44 8 Excessive
Rockland Ro-18 1949 04/30 16.58 90 Deficient
Rockland Ro-543 2005 04/30 6.26 - --
St. Lawrence St-40 1953 04/24 4.98 46 Normal
St. Lawrence St-404 1958 04/24 13.77 100 Deficient
Saratoga Sa-1285 2002 04/27 0.15 - --
Schenectady Sn-730 2004 04/26 4.15 - --
Schoharie So-602 2005 04/13 21.77 - --
Schuyler Sy-706 2003 04/27 6.40 - --
Seneca Se-532 2005 04/27 0.29 - --
Se-533 2005 04/27 -0.41 - --
Steuben Sb-472 1965 04/25 8.39 94 Deficient
Suffolk *S1810 1976 04/21 52.94 25 Normal
Suffolk *S1812 1982 04/18 51.22 0 Excessive
Suffolk *S4271 1946 04/27 13.59 0 Excessive
Suffolk *S5517 1948 unavailable
Suffolk *S8833 1951 unavailable
Sullivan Sv-535 2001 04/26 8.15 - --
Tioga Ti-891 2003 04/27 17.56 - --
Tompkins Tm-985 2005 04/27 3.57 - --
Tm-1968 2005 04/27 15.73 - --
Ulster U-1619 2002 04/30 16.06 20 Excessive
U-1620 2005 04/18 28.09 - --
Warren Wr-80 2005 04/21 17.15 - --
Washington W-533 1974 04/18 6.11 74 Normal
Wayne Wn-592 2004 04/27 8.81 - --
Westchester We-5020 2003 04/18 12.26 - --
Wyoming Wo-4 1974 04/30 12.74 93 Deficient
Yates Ya-180 2004 04/27 3.37 - --
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 4,676 4,800 4,165
01323500 Great Sacandaga Lake at Conklinville 36,410 35,910 31,700
04295000 Richelieu River (Lake Champlain) at Rouses Point, NY - Elevation in ft
above sea level
April 30, 2006 97.13 April 30, 2005 99.34
Average (1939-2004) 98.28
Maximum daily 101.81 (1993) Minimum daily 94.11 (1965)
Provisional Data for April 2006#
INDEX STREAMFLOW STATIONS
(Reference period 1971-2000)
## Reference period is 1978-2000
* Deficient
# Note: Flow statistics based on data collected through April 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.
