U.S. GEOLOGICAL SURVEY
WATER-RESOURCES CONDITIONS IN NEW YORK
JULY 2006
U.S. GEOLOGICAL SURVEY, WRD
New York District, Troy, NY
WATER RESOURCES REVIEW AND CURRENT CONDITIONS STATEMENT
FOR JULY 2006
Prepared August 3, 2006
Troy--Summary Report
Provisional streamflow conditions at all sites monitored and included in this report in
eastern New York were in the excessive range during July, except for the northern most site,
Little Salmon River at Bombay, which was in the normal range for July. The maximum monthly
mean discharge for July for the period of record was recorded at three sites included in
this report: Hudson River at Hadley (85 years), Canajoharie Creek near Canajoharie
(13 years), and Mohawk River at Cohoes (89 years).
The total New York City reservoir system was at 95.7 percent of capacity on July 31;
normal for this period is 90.3 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 July. 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 second consecutive month. The maximum monthly mean discharge for
July for the period of record was recorded at Unadilla River at Rockdale (70 years).
Coram--Summary Report
Mean flow at Connetquot Brook near Central Islip was in the normal range for the fifth
consecutive month.
___________________________________________________________________________________________
___________________________________________________________________________________________
Provisional Data for July 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 28.9 25 Normal
01312000 Hudson River at Newcomb 1925-87,2002 528 3 Excessive
01318500 Hudson River at Hadley 1921 4,340 0 Excessive
01321000 Sacandaga River nr Hope 1911 1,600 2 Excessive
01334500 Hoosic River near Eagle Bridge 1910 765 12 Excessive
01349150 Canajoharie Creek near Canajoharie 1993 74.1 0 Excessive
01350000 Schoharie Creek at Prattsville 1902 321 12 Excessive
01357500 Mohawk River at Cohoes 1917 8,980 0 Excessive
01371500 Wallkill River at Gardiner 1924 964 11 Excessive
01372500 Wappinger Cr nr Wappingers Falls 1928 212 10 Excessive
01387400 Ramapo River at Ramapo 1979 100 12 Excessive
01413500 E Br Delaware River at Margaretville 1937 324 5 Excessive
01420500 Beaver Kill at Cooks Falls 1913 383 22 Excessive
01423000 W Br Delaware River at Walton 1950 595 6 Excessive
01426000 Oquaga Creek at Deposit **1941-73,2002 107 10 Excessive
01502500 Unadilla River at Rockdale 1930-95,2001 2,760 0 Excessive
01503000 Susquehanna River at Conklin 1912 6,840 1 Excessive
01512500 Chenango River nr Chenango Forks 1912 4,530 2 Excessive
01531000 Chemung River at Chemung 1903 2,500 7 Excessive
03011020 Allegheny River at Salamanca 1903 2,010 11 Excessive
04213500 Cattaraugus Creek at Gowanda 1940-98,2000 584 11 Excessive
04217000 Tonawanda Creek at Batavia 1944 141 9 Excessive
04221000* Genesee River at Wellsville 1916 241 18 Excessive
04230500 Oatka Creek at Garbutt 1945 106 18 Excessive
04234000 Fall Creek at Ithaca 1925 342 2 Excessive
04235250 Flint Creek at Phelps 1960-95,2002 40.3 16 Excessive
04243500 Oneida Creek at Oneida 1950 211 3 Excessive
04250750 Sandy Creek near Adams 1958-95,2002 94.2 18 Excessive
04256000 Independence River at Donnattsburg 1942 155 6 Excessive
04262500 W Br Oswegatchie R nr Harrisville 1916 432 9 Excessive
04270200 Little Salmon River at Bombay 1958-95,2002 42.7 57 Normal
04275500 Ausable River at Au Sable Forks 1910-68,1990 650 8 Excessive
** 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 July 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 07/31 6.53 0 Excessive
Allegany Ag-261 2002 07/31 4.37 - --
Allegany Ag-262 2002 07/31 -0.93 - --
Broome Bm-128 1980 07/31 21.72 0 Excessive
Broome Bm-129 1985 07/31 67.52 12 Excessive
Cattaraugus Ct-121 1951 07/31 7.04 50 Normal
Cayuga Cy-223 2005 07/26 13.98 - --
Chautauqua Cu-10 1939 07/31 32.51 75 Normal
Chemung Cm-622 2002 07/31 23.59 15 Excessive
Chenango Cn-12 1975 07/26 7.71 2 Excessive
Clinton Cl-145 1992 07/31 23.20 51 Normal
Clinton Cl-242 2006 07/14 2.99 - --
Columbia Cb-1071 2004 07/19 10.44 - --
Cb-1072 2006 07/19 7.75 - --
Cortland C-998 2002 07/26 4.75 - --
Delaware D-503 2002 07/31 5.51 - --
Dutchess Du-321 1948 07/31 68.10 29 Normal
Dutchess Du-1009 1967 07/31 14.97 41 Normal
Erie E-1196 2004 07/31 13.18 - --
Essex Ex-150 2002 07/31 17.25 - --
Franklin F-60 2005 07/31 3.99 - --
Franklin F-854 2005 07/31 31.63 - --
Fulton Fu-271 2002 -- -- - --
Genesee Gs-190 2002 07/28 31.38 - --
Greene G-644 2003 -- -- - --
G-831 2006 -- -- - --
Hamilton H-3 1966 07/31 12.10 11 Excessive
Herkimer He-627 2004 -- -- - --
Jefferson J-176 2005 -- -- - --
Lewis L-174 2002 -- -- - --
Livingston Lv-330 2004 07/28 11.12 - --
Madison M-178 1975 07/31 7.23 5 Excessive
Monroe Mo-11 1984 07/28 7.83 14 Excessive
Montgomery Mt-411 2004 -- -- - --
Niagara Ni-70 1973 07/31 5.93 41 Normal
Niagara Ni-869 2003 07/31 1.46 - --
Oneida Oe-151 1926 07/31 19.07 4 Excessive
Oneida Oe-1457 2003 07/31 43.13 - --
Onondaga Od-1825 2004 07/26 11.38 - --
Onondaga Od-1833 2004 07/26 13.02 - --
Ontario **Ot-900 1955 07/28 7.49 60 Normal
Ontario Ot-1133 2002 07/28 3.07 - --
Orange O-2271 2002 07/31 6.65 - --
Orleans Ol-20 2004 07/31 21.09 - --
Oswego Ow-5013 2002 07/31 22.54 - --
Oswego Ow-5014 2002 07/31 23.01 - --
Otsego Og-23 1953 07/26 5.43 4 Excessive
Putnam P-1217 2005 07/31 14.83 - --
Rensselaer Re-703 1983 07/31 34.30 8 Excessive
Rockland Ro-18 1949 07/31 19.86 74 Normal
Rockland Ro-543 2005 07/31 8.30 - --
St. Lawrence St-40 1953 07/19 6.65 49 Normal
St. Lawrence St-404 1958 07/24 15.20 96 Deficient
Saratoga Sa-1285 2002 -- -- - --
Schenectady Sn-730 2004 07/31 5.53 - --
Schoharie So-602 2005 -- -- - --
Schoharie So-604 2006 -- -- - --
Schuyler Sy-706 2003 07/28 5.52 - --
Seneca Se-532 2005 07/28 0.14 - --
Se-533 2005 07/28 -0.46 - --
Steuben Sb-472 1965 07/31 8.05 7 Excessive
Suffolk *S1810 1976 07/18 53.48 29 Normal
Suffolk *S1812 1982 07/18 49.97 6 Excessive
Suffolk *S4271 1946 07/17 13.66 3 Excessive
Suffolk *S5517 1948 08/02 45.13 11 Excessive
Suffolk *S8833 1951 07/31 18.67 4 Excessive
Sullivan Sv-535 2001 07/31 10.04 - --
Tioga Ti-891 2003 07/31 18.04 - --
Tompkins Tm-985 2005 07/28 3.30 - --
Tm-1968 2005 07/28 14.00 - --
Ulster U-1619 2002 07/31 16.40 23 Excessive
U-1620 2005 07/21 29.79 - --
Warren Wr-80 2005 07/07 15.10 - --
Washington W-533 1974 -- -- - --
Wayne Wn-592 2004 07/28 8.53 - --
Westchester We-5020 2003 07/31 12.03 - --
Wyoming Wo-4 1974 07/31 12.78 30 Normal
Yates Ya-180 2004 07/28 3.78 - --
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 4,130 4,090 4,082
01323500 Great Sacandaga Lake at Conklinville 34,060 31,140 28,760
04295000 Richelieu River (Lake Champlain) at Rouses Point, NY - Elevation in ft
above sea level
July 31, 2006 97.99 July 31, 2005 96.64
Average (1939-2004) 95.86
Maximum daily 99.34 (1973) Minimum daily 93.81 (1965)
Provisional Data for July 2006#
INDEX STREAMFLOW STATIONS
(Reference period 1971-2000)
## Reference period is 1978-2000
** Excessive
# Note: Flow statistics based on data collected through July 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.
