U.S. GEOLOGICAL SURVEY, WRD New York District, Troy, NY WATER RESOURCES REVIEW AND CURRENT CONDITIONS STATEMENT FOR SEPTEMBER 1999 Prepared October 1, 1999 Troy Subdistrict--Summary Report Provisional mean flows in eastern New York were in the normal to excessive range at all sites monitored and included in this report. Drought conditions were still prevalent in early September. A new provisional minimum instantaneous discharge for the entire period of record (78 years) was recorded at Hudson River at Hadley (196 cfs, 9/3 - previous = 261 cfs, 7/7/95). In mid-September (9/16-17) Hurricane/Tropical Storm Floyd moved up the east coast and across parts of New York with heavy rains and high winds causing flash flooding, downed trees, and power outages. Governor Pataki declared a State of Emergency for the counties of Putnam, Rockland, Orange, Westchester, and Essex. Areas of southeast- ern New York had over 10 inches of rain (Brewster in Putnam County had 13.7 inches) and peak flows at several sites in the aforementioned counties in this area ranged from 50- to 70-year recurrence intervals. A new provisional maximum instantaneous discharge (1,740 cfs - previous = 1,550 cfs) for the period of record (41 years) was reported for Hackensack River at West Nyack in Rockland County based on floodmarks at the site. Also, a new provisional period-of-record (96 years) maximum monthly mean discharge for September was recorded at Schoharie Creek at Prattsville in Schoharie County (1,190 cfs - previous = 1,150 cfs). September in the Capital region had 11.02 inches of rain and was the second wettest month on record (over 100 years). Ithaca Subdistrict--Summary Report Provisional mean monthly flows at monitored sites included in this report for western New York were in the normal range at Chemung River at Chemung, Cheanago River at Chenango Forks, and Tonawanda Creek at Batavia. Sites at Oatka Creek at Garbutt, Genesee River at Wellsville, and Allegheny River at Salamanca were in the deficient range. Mean flow at Susquehanna River at Conklin was in the excessive range. Coram Subdistrict--Summary Report Provisional mean flow at Massapequa Creek at Massapequa was in the deficient range for the seventh consecutive month. ___________________________________________________________________________________________
___________________________________________________________________________________________ Provisional Data for September 1999# INDEX STREAMFLOW STATIONS (Reference period 1961-90)
* Deficient. e Estimate. ** Excessive. # Note: Flow statistics based on data collected through September 30, 1999. MONTHLY MEAN DISCHARGE FOR INDEX STREAMFLOW STATIONS
Provisional Data for September 1999# MEAN FLOW FOR SELECTED GAGING STATIONS Percent of median Flow for month Station (cfs) (period of record) 01321000 Sacandaga River near Hope 345 125 **01350000 Schoharie Creek at Prattsville 1,190 1,526 **01371500 Wallkill River at Gardiner 1,180 562 **01372500 Wappinger Creek near Wappingers Falls 185 514 **01413500 E Br Delaware River at Margaretville 353 735 **01420500 Beaver Kill at Cooks Falls 477 291 **01423000 W Br Delaware River at Walton 449 454 01512500 Chenango River near Chenango Forks 471 95 01531000 Chemung River at Chemung 399 103 *03011020 Allegheny River at Salamanca 236 52 04217000 Tonawanda Creek at Batavia 24 97 *04221000 Genesee River at Wellsville 31 37 *04230500 Oatka Creek at Garbutt 24 62 04256000 Independence River at Donnattsburg 117 146 ** Excessive. * Deficient. 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 3,477 3,577 2,824 01323500 Great Sacandaga Lake at Conklinville 21,390 24,730 21,930 04295000 Richelieu River (Lake Champlain) at Rouses Point, NY - Elevation in ft above sea level September 30, 1999 95.55 September 30, 1998 96.35 Average (1939-97) 94.79 Maximum daily 97.79 (1976) Minimum daily 92.91 (1941) New York City reservoir system was at 70.8 percent of capacity on September 30, 1999. Normal for this period is 75.6 percent of capacity. # Note: Flow statistics based on data collected through September 30, 1999. ___________________________________________________________________________________________ Provisional Data for September 1999 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 N1259, N1616, Q1249, Sa-1100, S1806, and S1810 have been affected by changes in ground-water withdrawals or sewering. Departure from Median County Well No. Date Water Level (through 1997) Albany A-636 9/30 10.60 + 0.03 Broome Bm-121 9/21 24.08 + 4.81 Cattaraugus Ct-121 9/29 8.35 + 2.26 Chemung Cm-46 9/28 25.34 - .20 Cortland C-102 9/21 12.35 - 3.03 Dutchess Du-1009 9/28 13.72 + 3.86 Kings K1194 9/23 10.12 + .09 Madison M-178 9/28 10.12 - .36 Nassau N1259 9/28 44.13 - 5.89 Nassau N1616 9/28 69.40 - 4.44 Oneida Oe-151 9/30 26.95 - 1.23 Queens Q1249 9/27 21.99 - 9.03 St. Lawrence St-40 9/27 6.79 + 1.00 Saratoga Sa-1100 9/28 73.82 - 4.28 Steuben Sb-472 9/20 9.72 + .51 Suffolk S1810 9/28 49.22 - 1.51 Suffolk S1812 9/29 44.14 - 1.08 Suffolk S4271 9/27 11.13 + .53 Suffolk S5517 9/27 42.28 - .57 Suffolk S8833 9/29 15.62 - .50 * Water level in feet below land-surface datum unless noted with * which indicates reference to sea level. Note: Data for Cu-10, Cn-12, Og-23, S1806, and Wo-4, unavailable.
