01118300 Pendleton Hill Brook near Clarks Falls, CT

LOCATION.--Lat 41o28'29", long 71o50'05", New London County, Hydrologic Unit 01090005, on left bank just upstream from twin culverts on Grindstone Hill Road, 0.1 mi west of State Route 49 in the township of North Stonington, 1.6 mi northwest of Clarks Falls, and 3.4 mi northeast of village of North Stonington.
DRAINAGE AREA.--4.02 mi2.
PERIOD OF RECORD.--July l958 to current year.
REVISED RECORDS.--WDR CT-85-1: 1982 (P).
GAGE.--Water-stage recorder. Datum of gage is 152.90 ft above sea level. Satellite telemetry at station
REMARKS.--Records good except those for periods of ice effect, which are fair.

        Additional Data on the Web for station 01118300:


 
 
 
 
 
 

01118500 Pawcatuck River at Westerly, RI

LOCATION.--Lat 41o23'01", long 71o50'01", Washington County, Hydrologic Unit 01090005, on left bank at Westerly, 2.1 mi downstream from Shunock River.
DRAINAGE AREA.--295 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--November 1940 to current year.
REVISED RECORDS.--WSP 1051: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 1.76 ft below sea level.
REMARKS.--Records good except those for estimated daily discharges, which are fair. Diurnal fluctuation at low flow prior to 1962 by mills upstream; regulation much greater prior to 1958. Diversion upstream for municipal supply of Westerly.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood in March 1936 reached a discharge of 3,150 ft3/s, by computation of flow over dam 1.5 mi upstream. Maximum discharge since 1886 occurred in November 1927 and was possibly more than twice that in March 1936. Maximum stage since at least 1635, 15.0 ft Sept. 21, 1938, due to hurricane tidal wave.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water years 1953, 1963, 1976 to current year.
PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: June 1978 to September 1992.
WATER TEMPERATURES: June 1978 to September 1992.
INSTRUMENTATION.--Water-quality monitor June 1978 to September 1992.
REMARKS.--Instantaneous records are representative of the cross section while continuous records are based on point samples.
EXTREMES FOR PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: Maximum, 354 microsiemens June 25, 1985; minimum, 27 microsiemens June 7, 1982.
WATER TEMPERATURES: Maximum, 30.0oC Aug. 9, 1980, Aug. 17, 18, 1987; minimum, 0.0oC on many days during the winter period.

01118668 Whitford Brook near Old Mystic, CT

LOCATION.--Lat 41o24'30", long 71o57'49", New London County, Hydrologic Unit 01090005, on right bank approximately 400 ft downstream from road intersection of Gallop Hill Road and Shewville Road, and 1.2 mi north of Old Mystic.
DRAINAGE AREA.--12.0 mi2.
PERIOD OF RECORD.--August 1999 to current year.
GAGE.--Water-stage recorder. Datum of gage is 34 ft above sea level, from topographic map. Satellite telemetry at station
REMARKS.--Records good except those for periods of ice effect, which are fair.

      Additional Data on the Web for station 01118668:


 
 
 
 
 
 
 
 
 
 

01119040 Poquonuck River near Groton, CT

LOCATION.--Lat 41o19'00", long 72o03'43", New London County, Hydrologic Unit 01100003, at pier on east side of Avery Point, University of Connecticut, 2 mi south of Groton, at mouth of Poquonock River in Long Island Sound.
PERIOD OF RECORD.--January 1973 to current year.
GAGE.--Water-stage recorder. Datum of staff gage is 10.00 ft below sea level. Prior to Apr. 30, 1982, at datum 7.98 ft higher; prior to May 4, 1986, at datum 7.20 ft higher..
REMARKS.--Stage data in feet at 5-minute intervals available upon request. Telephone gage-height telemeter at this station
EXTREMES FOR PERIOD OF RECORD.-- Maximum tidal elevation, 6.63 ft, Feb. 6, 1978; minimum, -5.02 ft, Feb. 2, 1976.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum tidal elevation, 9.7 ft, Sept. 21, 1938 at site 2.7 mi upstream on Thames River at New London Pier and at same datum, gage operated by National Ocean Survey.

          Additional Data on the Web for station 01119040:

 
 
 
 
 
 
 
 

01119375 Willimantic River at Merrow, CT


LOCATION.--Lat 41o50’07, long 72o18’38, Tolland County, Hydrologic Unit 01100002, at bridge on State Highway 195, 0.7 mi upstream from Merrow, 0.8 mi downstream from Newcomb Brook, and 1.5 mi upstream from Winding Brook.
DRAINAGE AREA.--94.0 mi2.
PERIOD OF RECORD.--Water year l974 to current year.
REMARKS.--Discharges shown for this location are computed by determining the discharge for station 01119384, 2.0 mi downstream, and adjusting its discharge by multiplying by a factor of 0.98, which is the ratio of the two stations’ drainage areas.


 
 
 
 
 
 
 
 
 

01119500 Willimantic River near Coventry, CT

LOCATION.--Lat 41o45'02", long 72o15'58", Tolland County, Hydrologic Unit 01100002, on left bank 700 ft upstream from bridge on State Route 31, 1 mi downstream from Mill Brook, 2.4 mi southeast of South Coventry, 2.8 mi upstream from Hop River, and 6.3 mi upstream from mouth.
DRAINAGE AREA.--l21 mi2.
PERIOD OF RECORD.--Discharge: September 1931 to current year.
Water-quality records: Water years 1956-57, 1963-64, 1975-80.
REVISED RECORDS.--WSP 781: 1934 (m). WSP 851: 1935-36. WSP 1201: 1932 (M,m), l933-34, l937, 1939-42. WDR 79-1: 1978 (m). WDR CT-83-1: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 239.05 ft above sea level (levels by Corps of Engineers).
REMARKS.--Records fair except those for periods of estimated record, which are poor. Natural flow of stream regulated by Staffordville Reservoir. High streamflow regulated by six flood-detention reservoirs in Middle River basin, combined usable flood capacity, 305,400,000 ft3.

        Additional Data on the Web for station 01119500:


 
 
 
 
 

01120800 Natchaug River at Chaplin, CT

LOCATION.--Lat 41o48'03", long 72o07'07", Windham County, Hydrologic Unit 01100002, on left bank at upstream side of bridge on Bear Hill Rd., northeast of Chaplin.
DRAINAGE AREA.--67.9 mi2
PERIOD OF RECORD.--May 1962 to September 1964, March 1995 to present.
REMARKS.--The instantaneous record values will not necessarily fall within the corresponding daily range of the continuous records.


 
 
 
 
 
 
 
 
 
 
 

01121000 Mount Hope River near Warrenville, CT

LOCATION.--Lat 41o50'37", long 72o10'10", Windham County, Hydrologic Unit 01100002, on left bank 250 ft downstream from Knowlton Brook, 700 ft upstream from bridge on State Route 89, 1.8 mi south of Warrenville, and 3.2 mi southwest of Ashford.
DRAINAGE AREA.--28.6 mi2.
PERIOD OF RECORD.--July 1940 to current year.
REVISED RECORDS.--WSP 1331: 1941, 1951-53(M). WSP 1721: Drainage area. WDR CT-75-1: 1974 (P).
GAGE.--Water-stage recorder. Datum of gage is 335.68 ft above sea level. Satellite telemetry at station.
REMARKS.--Records good except those for periods with ice effect, which are fair. Chemical analyses available for water year 1959 (WSP 1641). Occasional regulation from ponds upstream.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of September 1938 reached a stage of about 14.5 ft, from floodmarks.

      Additional Data on the Web for station 01121000:


 
 
 
 
 
 

01122000 Natchaug River at Willimantic, CT

LOCATION.--Lat 41o43'11", long 72o11'46", Windham County, Hydrologic Unit 01100002, on left bank at upstream side of bridge on State Route 66, 1 mi northeast of Willimantic, 1.6 mi upstream from mouth, and 3.7 mi downstream from Mansfield Hollow Dam.
DRAINAGE AREA.--174 mi2.
PERIOD OF RECORD.--Discharge: October 1930 to September 1989, October 1995 to current year.
Water-quality records: Water years 1954, 1958, 1968.
REVISED RECORDS.--WSP l30l: 1934-35(M), 1937(M). WDR CT-83-1: Drainage area.
GAGE.--Water-stage recorder and crest-stage gage.. Datum of gage is 150.31 ft above sea level (levels by Corps of Engineers). Oct. 6, 1930, to June 6, 1974, water-stage recorder on right bank 500 ft upstream at same datum. June 6, 1974 to Aug. 26, 1975, staff gage at present site and datum. Telephone telemetry at station. Satellite telemetry at station
REMARKS.--Records good except those for estimated daily discharge, which are fair. City of Willimantic diverts an average of about 1.8 Mgal/d for municipal supply from reservoir 2 mi upstream. Operation of water wheels at this location causes diurnal fluctuation at low flow. Flow regulated since March 1952 by Mansfield Hollow Lake.

     Additional Data on the Web for station 01122000:


 
 
 
 
 
 
 

01122500 Shetucket River near Willimantic, CT

LOCATION.--Lat 41o42'01", long 72o10'57", Windham County, Hydrologic Unit 01100002, on right bank at downstream side of Bingham Bridge on Plains Road, 500 ft upstream from Penn. Central Co. railroad bridge, 500 ft downstream from Potash Brook, 1.3 mi downstream from confluence of Willimantic and Natchaug Rivers, 1.5 mi southeast of Willimantic, and 17 mi upstream from mouth.
DRAINAGE AREA.--404 mi2.
PERIOD OF RECORD.--Discharge: April 1904 to December 1905, October 1919 to September 1921, September 1928 to current year. Published as "at South Windham" October 1919 to September 1921, September 1928 to September 1933.
Monthly discharge only for some periods, published in WSP 1301.
Water-quality records: Water years 1957, 1968-74.
Daily water temperature: Water year 1957.
Daily specific conductance: Water year 1957.
Daily pH: Water year 1957.
Daily iron: Water year 1957.
REVISED RECORDS.--WSP 781: l934(M). WSP 801: 1935. WSP 1201: 1905(M), 1920-2l. WDR CT-83-1: Drainage area.
GAGE.--Water-stage recorder since Dec. 5, 1933. Datum of gage is 131.40 ft above sea level (levels by Corps of Engineers). Apr. 4, 1904, to Dec. 31, 1905, non-recording gage at present site and about the same datum. October 1919 to Sept. 30, 1921, and Sept. 1, 1928 to Sept. 30, 1933, water-stage recorder at site 1.5 mi downstream at different datum. Telephone telemetry at station. Satellite telemetry at station.
REMARKS.--Records good except those for periods of ice effect, which are fair. Flow regulated by mills and flood detention reservoirs on Willimantic River, by pumping for municipal water supply of city of Willimantic on the Natchaug River, and by Mansfield Hollow Lake flood-control reservoir.

      Additional Data on the Web for station 01122500:


01122610 Shetucket River at S. Windham, CT


LOCATION.--Lat 41o40’56”, long 72o09’59”, Windham County, Hydrologic Unit 01100002, at bridge on State Highway 203, at South Windham, 0.8 mi downstream from Jordan Brook, and 1.8 mi upstream from Cold Brook.
DRAINAGE AREA.--408 mi2 .
PERIOD OF RECORD.--Water year 1974 to current year.
PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: August 1980 to September 1992.
WATER TEMPERATURE: August 1980 to September 1992.
INSTRUMENTATION.--Water-quality monitor August 1980 to September 1992.
REMARKS.--Discharges shown for this location are computed by determining the discharge for station 01122500, 1.6 mi upstream, and adjusting its discharge by multiplying by a factor of 1.01, which is the ratio of the two stations’ drainage areas. Instantaneous records are representative of the cross section while continuous records are based on point samples. ** Samples were taken 1.6 mi upstream at station 01122500 due to work being performed at bridge where samples are normally taken.
EXTREMES FOR PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: Maximum, 301 microsiemens May 21, 1982; minimum, 27 microsiemens Aug. 14, 1989.
WATER TEMPERATURE: Maximum, 29.0oC July 18, 19, 1982, Aug. 15, 1988; minimum, 0.0oC on many days during winter period.


 
 
 

01123000 Little River near Hanover, CT

LOCATION.--Lat 41o40'18", long 72o03'10", Windham County, Hydrologic Unit 01100002, on left bank 800 ft upstream from bridge on Hanover Road, 0.7 mi downstream from Peck Brook, 2.3 mi northeast of Hanover, and 6.5 mi upstream from mouth.
DRAINAGE AREA.--30.0 mi2.
PERIOD OF RECORD.--July 1951 to current year.
REVISED RECORDS.--WDR CT-83-1: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 221.19 ft above sea level.
REMARKS.--Records good except those for periods with ice effect, which are poor.
 
 

       Additional Data on the Web for station 01123000:


 
 
 
 
 
 
 
 
 

01124000 Quinebaug River at Quinebaug, CT

LOCATION.--Lat 42o01'20", long 71o57'22", Windham County, Hydrologic Unit 01100001, on right bank at Quinebaug, 500 ft upstream from bridge on State Highway 197, 0.2 mi downstream from Massachusetts-Connecticut State line, 7.8 mi upstream from French River, and at mile 46.
DRAINAGE AREA.--155 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--September 1931 to current year.
REVISED RECORDS.--WSP 851: 1936(M). WSP 1201: 1939-43, 1949. WSP 1381: 1938(M). WDR CT-83-1: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 341.52 ft above sea level.
REMARKS.--Records good except for periods of estimated record, which are fair. Flow regulated by East Brimfield and Westville Lakes, and by smaller reservoirs upstream. Telephone gage-height telemeter at this station.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--Chemical analyses available for water years 1953 (WSP 1290), 1960 (WSP 1741), 1963 (WSP 1941), 1969 (WSP 2143). Water temperatures available for water year 1960 (WSP 1741), 1980 to current year.
PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: October 1959 to September 1960, October 1968 to September 1969.
pH: October 1959 to September 1960, October 1968 to September 1969.
WATER TEMPERATURES: October 1959 to September 1960, October 1968 to September 1969.
DISSOLVED OXYGEN: October 1959 to September 1960, October 1968 to September 1969.
EXTREMES FOR PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: Maximum, 308 microsiemens Jan. 31, 1969; minimum, 49 microsiemens April 2, 1960.
pH: Maximum, 7.7 units June 14, 1969; minimum, 5.8 units July 18, 1969.
WATER TEMPERATURE: Maximum, 30.5oC July 16, 1969; minimum, 0.0o C on many days during December to March.
DISSOLVED OXYGEN: Maximum, 15.1 mg/L Dec. 28, 1968; minimum, 1.4 mg/L Sept. 7, 1969.
REMARKS.--The instantaneous record values will not necessarily fall within the corresponding daily range of the continuous records.

01125100 French  River at N. Grosvenordale, CT


LOCATION.--Lat 41o58’41, long 71o54’03, at Red Bridge Road, 0.5 mi south of North Grosvenordale, 0.45 mi downstream of Backwater Brook, 1.2 mi upstream of Stoud Brook.
DRAINAGE AREA.--101 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--Partial-record gage October 1991 to June 2000. June 2000 to September 2001. June 10, 2002 to September 30, 2002.
GAGE.--Nonrecording gage October 1991 to June 2000. Water-stage recorder. Datum of gage is 350.00 ft above sea level.
REMARKS.--No estimated daily discharges. Records good. Flow regulated by Hodges Village and Buffumville Reservoirs, by Lake Chaubunagungamaug and other smaller reservoirs upstream.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--October 1991 to current year.

 


 
 
 
 
 
 

01125500 Quinebaug River at Putnam, CT

LOCATION.--Lat 41o54'34", long 71o54'48", Windham County, Hydrologic Unit 01100001, on right bank at Putnam, 0.15 mi downstream from Little River, 0.3 mi upstream from New York, New Haven and Hartford Railroad bridge, 2.8 mi downstream from French River, 3.0 mi downstream from West Thompson Dam, and 36 mi upstream from mouth.
DRAINAGE AREA.--328 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--December 1929 to September 1969, October 1995 to current year. Monthly discharge only for October and November 1929, published in WSP 1301. Stage record only October 1974 to September 1995.
GAGE.--Water-stage recorder and crest-stage gage.. Datum of gage is 216.76 ft above sea level. Prior to Aug. 1, 1958, at same site on left bank at same datum. Satellite telemetry at station.
REMARKS.--Records good except those for periods of ice effect, which are fair. Flow regulated by East Brimfield, Westville, West Thompson, Hodges Village, and Buffumville Reservoirs, by Lake Chaubunagungamaug, estimated usable capacity 207,000,000 ft3, and by smaller reservoirs upstream.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--Chemical analyses available for water years 1955, 1957-1958, 1959, 1960, 1962, 1970, 1972, January 1999 to current.

01125520 Quinebaug River at Cotton Road Bridge near Pomfret, CT


LOCATION.--Lat 41o51’30”, long 71o55’28”, Windham County, Hydrologic Unit 01100001, at Cotton Road Bridge 1.5 mi northwest of Rogers.
DRAINAGE AREA.--342 mi2.
PERIOD OF RECORD.--Water years 1974-80, March 1995 to current year.
REVISED RECORDS.--WDR CT-74-80, 1995: Drainage area.
REMARKS.--Water-quality records for this site were published under station number 01125720 for water years 1974-80, March 1995 to September 30, 1995. This changes the drainage area from 376 mi2 to 342 mi2. Discharge determined by drainage area correction from station 01125500. The instantaneous record values will not necessarily fall within the corresponding daily range of the continuous records.


 
 
 
 
 

01127000 Quinebaug River at Jewett City, CT

LOCATION.--Lat 41o35'52", long 71o59'05", New London County, Hydrologic Unit 01100001, on left bank behind high school on Slater Avenue at Jewett City, 570 ft downstream from outlet of canal from Wedgewood Mills at mouth of Pachaug River, 1,000 ft downstream from railroad bridge and at mile 6.1.
DRAINAGE AREA.--713 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.-- July 1918 to current year.
REVISED RECORDS.--WSP 781: Drainage area. WSP 1301: 1919-26 (M). WDR CT-83-1: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 63.07 ft above sea level. Satellite telemetry at station.
REMARKS.--Records good except those for periods with ice effect, which are fair. Flow regulated by East Brimfield, Westville, West Thompson, Hodges Village, and Buffumville Reservoirs, by Lake Chaubunagungamaug, estimated usable capacity 207,000,000 ft3, and by smaller reservoirs upstream and by hydropower plant upstream.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water years 1956, 1968 to current year.
PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: October 1974 to September 1990.
WATER TEMPERATURES: October 1955 to September 1956, October 1968 to September 1990.
INSTRUMENTATION.--Temperature recorder Oct. 1, 1968, to Sept. 30, 1974. Water-quality monitor October 1974 to September 1990.
REMARKS.--Unpublished records of iron, specific conductance, pH of daily samples for 1955-56 available in the office at East Hartford, Conn. The instantaneous record values will not necessarily fall within the corresponding daily range of the continuous records.
EXTREMES FOR PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: Maximum, 309 microsiemens July 23, 1975; minimum, 42 microsiemens June 14, 1975, March 23, 1980, July 27-28, 1990.
WATER TEMPERATURES: Maximum, 32.5oC Aug. 2, 1975, May 8, 1977; minimum, 0.0oC on many days during winter period.

01127500 Yantic River at Yantic, CT

LOCATION.--Lat 41o33'31", long 72o07'19", New London County, Hydrologic Unit 01100003, on left bank at Yantic, 700 ft. downstream from stone-arch highway bridge, 1 mi downstream from Susquetonscut Brook, and 4.8 mi upstream from mouth.
DRAINAGE AREA.--89.3 mi2.
PERIOD OF RECORD.--Discharge: October 1930 to current year.
Water-quality records: Water years 1958, 1968-80.
Daily suspended-sediment discharge: Water years 1975-80.
REVISED RECORDS.--WSP 1051: 1931-36. WSP 1301: 1934 (M). WDR CT-78-1: 1970-77 (P). WDR CT-82-1: 1979-80 (P).
WDR CT-83-1: Drainage area, 1979 (P), 1982 (P).
GAGE.--Water-stage recorder. Datum of gage is 94.46 ft above sea level.
REMARKS.--Records good except those for periods of estimated record, which are fair. Low flow regulated by mills upstream. City of Norwich automated flood warning system is on site.
 

       Additional Data on the Web for station 01127500:


 
 
 
 
 

01172003 Connecticut River below Holyoke Dam at Holyoke, MA

LOCATION.--Lat 42o12'36", long 72o35'44", Hampden County, Hydrologic Unit 01080201, on right bank, 2,200 ft downstream from dam of Holyoke Water Power Co. in Holyoke, MA. and at mile 86.
DRAINAGE AREA.--8,309 mi2 .
PERIOD OF RECORD.--December 1983 to current year.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 43.276 ft above sea level. Telephone telemetry at station. Satellite telemetry at station.
REMARKS.--No estimated daily discharges. Records good. Flow regulated by power plants, by First Connecticut and Second Connecticut Lakes, Lake Francis, Moore and Comerford Reservoirs, and other reservoirs, combined usable capacity, about
47 billion ft3. Records do not include water diverted around gage by Holyoke Water Power Company for industrial use.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge since at least 1854, 244,000 ft3/s, March 20, 1936, gage height, 35.0 ft, from floodmarks.
 

      Additional Data on the Web for station 01172003:


 
 
 

01184000 Connecticut River at Thompsonville, CT

LOCATION.--Lat 41o59'14", long 72o36'21", Hartford County, Hydrologic Unit 01080205, on right bank just upstream from Enfield Dam, 1.0 mi downstream from Thompsonville, 3.0 mi downstream from Massachusetts-Connecticut State line, and at mile 63.6.
DRAINAGE AREA.--9,660 mi2.

WATER-DISCHARGE RECORDS


PERIOD OF RECORD.--July 1928 to current year.
REVISED RECORDS.--WSP 741: 1932. WDR CT-77-1: 1976. WDR CT-83-1: Drainage area, 1982.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 38.48 ft above sea level. November 28, 1986, to August 2, 1990, recorder at site 200 ft. downstream at datum 0.28 ft. lower. Telephone telemetry at station. Satellite telemetry at station.
REMARKS.--Records good. Flow regulated by power plants, by diversion from Chicopee River basin and by First Connecticut and Second Connecticut Lakes, Lake Francis, Moore and Comerford Reservoirs, Quabbin Reservoir, and other reservoirs, combined usable capacity, about 107 billion ft3.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water years 1956, 1966 to current year.
PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: October 1974 to current year.
WATER TEMPERATURES: October 1955 to September 1956, October 1973 to current year.
INSTRUMENTATION.--Water-quality monitor since October 1973.
REMARKS.--Interruptions in the record are due to malfunctions of the instrument. Instantaneous records are representative of the cross section while continuous records are based on point samples. The instantaneous record values will not necessarily fall within the corresponding daily range of the continuous records. Extremes for period of daily record and current year are for those values reported.

01184100 Stony Brook near West Suffield, CT

LOCATION.--Lat 41o57'38", long 72o42'39", Hartford County, Hydrologic Unit 01080205, on right bank at upstream side of bridge on South Grand Street, 2.1 mi south of West Suffield.
DRAINAGE AREA.--10.4 mi2.
PERIOD OF RECORD.--Annual maximum, water years 1960-81. May 1981 to current year.
REVISED RECORDS.--WDR CT-83-1: Drainage area.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 149.21 ft above sea level.
REMARKS.--Records good except those for periods with ice effect, which are poor.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge, 17,300 ft3/s on basis of slope-area measurement, at site 5.6 mi downstream, just below State Route 75, drainage area = 36.9 mi2, Aug. 19, 1955.

      Additional Data on the Web for station 01184100:

 


 

01184490 Broad Brook at Broad Brook, CT

LOCATION.--Lat 41o54'50", long 72o33'00", Hartford County, Hydrologic Unit 01080205, on left bank just upstream from bridge on State Route 191 (Mill Street) at Broad Brook, 0.5 mi upstream from mouth.
DRAINAGE AREA.--15.5 mi2.

WATER-DISCHARGE RECORDS


PERIOD OF RECORD.--August 1961 to September 1976, May 1982 to current year.
REVISED RECORDS.--WSP 2101: 1962 (P). WDR CT-83-1: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 46.210 ft above sea level.
REMARKS.--Records good except those for periods of ice effect, which are fair. Flow regulated by reservoir and mill upstream.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--April 1997 to current year.

Additional Data on the Web for station 01184490:

01186000 West Branch Farmington River at Riverton, CT

LOCATION.--Lat 41o57'46", long 73o01'05", Litchfield County, Hydrologic Unit 01080207, on right bank at downstream side of bridge on State Route 20 at Riverton, 0.3 mi upstream from Still River, 2.0 mi downstream from Goodwin Dam of West Branch Reservoir, and at mile 55.
DRAINAGE AREA.--131 mi2.
PERIOD OF RECORD.--Discharge: August 1955 to current year.
Water-quality records: Water Years 1954, 1955, 1975-80.
REVISED RECORDS.--WSP 1501: 1956. WSP 1551: 1957. WSP 1701: 1958-59.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 485.60 ft above sea level. Prior to Mar. 29, 1957, non-recording gage at same site and datum. Telephone telemetry at station. Satellite telemetry at station.
REMARKS.--Records good except those with ice effect, which are poor. Flow regulated by Otis and West Branch Reservoirs and Colebrook River Lake.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Aug. 19, 1955, reached a stage of 21.1 ft, from floodmarks, discharge, 57,200 ft3/s, by slope-area measurement 1.5 mi upstream.

      Additional Data on the Web for station 01186000:

01186500 Still River at Robertsville, CT

LOCATION.--Lat 41o58'04", long 73o02'04", Litchfield County, Hydrologic Unit 01080207, on left bank 1,500 ft downstream from Sandy Brook, 1 mi southeast of Robertsville, 1 mi northwest of Riverton, and 1 mi upstream from mouth.
DRAINAGE AREA.--85.0 mi2.
PERIOD OF RECORD.--July 1948 to September 1967, July 1969 to current year.
REVISED RECORDS.--WSP 1901: 1948-60. WDR-CT-83-1: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 510.24 ft above sea level.
REMARKS.--No estimated daily discharge. Records good. Flow regulated by power plant, Mad River and Sucker Brook Detention Reservoirs, and Highland Lake.

      Additional Data on the Web for station 01186500:

01187300 Hubbard River near West Hartland, CT

LOCATION.--Lat 42o02'14", long 72o56'22", Hartford County, Hydrologic Unit 01080207, on left bank at Massachusetts-Connecticut Stateline, 800 ft upstream from bridge on State Route 20, 0.5 mi upstream from confluence with Valley Brook, and 2.6 mi northeast of West Hartland.
DRAINAGE AREA.--19.9 mi2.
PERIOD OF RECORD.--January 1938 to September 1955, September 1956 to current year. Monthly discharge only for periods January 1938 to September 1955, October 1956 to September 1960, published in WSP 1721. Daily figures for the periods January 1938 to September 1955, September 1956 to September 1960, available upon request.
REVISED RECORDS.--WDR-CT-83-1: Drainage area.
GAGE.--Water-stage recorder and stepped sharp-crested weir. Datum of gage is 594.57 ft above sea level. Prior to October 1, 1981, at datum 0.05 ft higher.
REMARKS.--Records good except those for periods with ice effect, which are poor.
COOPERATION.--Gage-height record prior to May 28, 1982, furnished by Water Bureau, Metropolitan District Commission, Hartford, Connecticut.

      Additional Data on the Web for station 01187300:


01188000 Burlington Brook Near Burlington, CT

LOCATION.--Lat 41o47'10", long 72o57'55", Hartford County, Hydrologic Unit 01080207, on left bank 1.2 mi north of Burlington, 3 mi upstream from mouth, 2,000 feet east of the intersection of Covey Road on Hotchkiss Road, and 3 mi southwest of Collinsville.
DRAINAGE AREA.--4.10 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--September 1931 to current year.
REVISED RECORDS.--WSP 1301: 1933-45 (M). WDR-CT-83-1: Drainage area.
GAGE.--Water-stage recorder and compound sharp-crested weir. Datum of gage is 714.00 ft above sea level. Satellite telemetry at station.
REMARKS.--Records good except those for periods of ice effect, which are fair. Occasional regulation at low flow.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water years 1956, 1968 to current year.
PERIOD OF DAILY RECORD.--
WATER TEMPERATURES: January 1971 to January 1972.
EXTREMES FOR PERIOD OF DAILY RECORD.--
WATER TEMPERATURES: Maximum, 23.5oC July 27, Aug. 9, 1971; minimum, 0.0oC on many days during winter periods.
REMARKS.--The instantaneous record values will not necessarily fall within the corresponding daily range of the continuous records.

Additional Data on the Web for station 01188000:

01188090 Farmington River at Unionville, CT

LOCATION.--Lat 41o45'2", long 72o53'14", Hartford County, Hydrologic Unit 01080207, at right bank upstream of steel truss highway bridge on State Route 177 at Unionville, 4.1 mi downstream from Burlington Brook and 3.0 mi upstream from Pequabuck River.
DRAINAGE AREA.--378 mi2.

WATER DISCHARGE RECORDS

PERIOD OR RECORD.--October 1977 to current year.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 178.20 ft above sea level. Satellite telemetry at station.
REMARKS.--Records good except those for periods of estimated daily discharges, which are fair. Flow regulated by Otis Reservoir, Colebrook River Lake, West Branch Reservoir, Mad River and Sucker Brook Detention Reservoirs, Highland Lake, Barkhamsted, East Branch, and Nepaug Reservoirs, and by diversion for municipal supply from Barkhamsted and Nepaug Reservoirs.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Aug. 19, 1955, reached a stage of 32.9 ft from floodmark, discharge, 140,000 ft3/s, by slope-area measurement 3.8 mi upstream.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water years 1977-80, 1984 to present.
REMARKS.--Water-quality records for this site published under station 01188085 from water year 1984 to water year 1990. The instantaneous record values will not necessarily fall within the corresponding daily range of the continuous records.

Additional Data on the Web for station 01188090:

01189000 Pequabuck River at Forestville, CT

LOCATION.--Lat 41o40'23", long 72o54'04", Hartford County, Hydrologic Unit 01080207, on left bank 500 ft upstream from bridge on Central Street, 0.2 mi downstream from Copper Mine Brook, and 6.5 mi upstream from mouth.
DRAINAGE AREA.--45.8 mi2.
PERIOD OF RECORD.--Discharge: July 1941 to current year.
Water-quality records: Water years 1956, 1960, 1971-72.
REVISED RECORDS.--WSP 971: 1941-42. WSP 1111: 1947. WSP 1901: 1959-60. WDR-CT-83-1: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 197.72 ft above sea level.
REMARKS.--Records good except those for periods with ice effect, which are poor. Flow regulated by Whigville Reservoir and mills upstream. Diversion for municipal supply of city of New Britain from Whigville Reservoir, Whites Bridge wells, and Coppermine Brook.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of September 1938 reached a stage of about 7.3 ft, from floodmarks, discharge, 3,800 ft3/s, on basis of slope-area measurement of peak flow and computation of peak flow over dam.

      Additional Data on the Web for station 01189000:

01189030 Pequabuck River at Farmington, CT

LOCATION.--Lat 41o43’00”, long 72o50’25”, Hartford County, Hydrologic Unit 01080207, at bridge on Meadow Road, at Farmington, and 0.2 mi upstream from Farmington River.
DRAINAGE AREA.--57.2 mi2.
PERIOD OF RECORD.--Water years 1971, 1974 to current year.

Additional Data on the Web for station 01189030:


01189995 Farmington River at Tariffville, CT

LOCATION.--Lat 41o54'30", long 72o45'40", Hartford County, Hydrologic Unit 01080207, on right bank at Tariffville, behind house at 20 Tunxis Road, 0.3 mi downstream from bridge on State Route 189 and 5.5 mi upstream from gage at Rainbow.
DRAINAGE AREA.--577 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--January 1913 to August 1928 furnished by Farmington River Power Company. August 1928 to September 1939, October 1971 to current year.
REVISED RECORDS.--WSP 851: 1936. WSP 1301: 1937-39 (revised records published are included with those for "Farmington River at Rainbow, Conn."). WDR CT-76-1: 1972-75. WDR CT-80-1: Drainage area.
GAGE.--Water-stage recorder August 1928 to September 1939 and since October 1971. January 1913 to August 1928, staff gage on forebay of dam of Hartford Electric Light Co. Datum of gage is 130.21 ft above sea level. Telephone telemetry at station.
REMARKS.--Records good except those for periods of estimated record, which are fair. Flow regulated by Otis Reservoir, Colebrook River Lake, West Branch Reservoir, Mad River and Sucker Brook Detention Reservoirs, Highland Lake, Barkhamsted, East Branch, Nepaug and Whigville Reservoirs, and by diversion for municipal supply from Barkhamsted, Nepaug and Whigville Reservoirs.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water years 1967-68, 1971 to current year.
PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: January 1971 to January 1972.
WATER TEMPERATURES: January 1971 to January 1972.
EXTREMES FOR PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: Maximum recorded, 285 microsiemens Feb. 16, 1971; minimum recorded, 70 microsiemens May 14,15, 1971.
WATER TEMPERATURES: Maximum, 26.5oC June 25, 27, 1971; minimum, 0.0oC on many days during winter period in 1971.
REMARKS.--The instantaneous record values will not necessarily fall within the corresponding daily range of the continuous records.

Additional Data on the Web for station 01189995:


01190070 Connecticut River at Hartford, CT

LOCATION.--Lat 41o46'10", long 72o40'04", Hartford County, Hydrologic Unit 01080205, at Bulkeley Memorial Bridge on U.S. Highway 84, at Hartford, 1.5 mi downstream from Podunk River and 1.2 mi upstream from Hockanum River.
DRAINAGE AREA.--10,487 mi2.

WATER-STAGE RECORD

PERIOD OF RECORD.--January 1905 to current year.
REVISED RECORDS.-- WDR CT-83-1: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is sea level. Telephone telemetry at station. Satellite telemetry at station.
REMARKS.--Records good except those from Oct. 1 to Oct. 11, which are missing due to equipment failure. At times of high freshwater inflow, tidal effect is eliminated. Stage data in feet at 15-minute intervals available upon request. Conversions to City of Hartford datum, add 0.55 ft. Records prior to 1973 available at the River Forecast Center, NOAA, Taunton MA.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 313,000 ft3/s, Mar. 20, 1936; maximum elevation, 37.05 ft, Mar. 21, 1936; minimum tidal elevation (1973-95), -0.91 ft, Aug. 12, 1974.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--September 1976 to current year.

Additional Data on the Web for station 01190070:


01192050 Hockanum River near Rockville, CT

LOCATION.--Lat 41o51’57”, long 72o29’12”, Hartford County, Hydrologic Unit 01080203, at bridge on State Rt. 74 near Rockville.
DRAINAGE AREA.--25.5 mi2.
PERIOD OF RECORD.--August 1968, March 1995 to current year.

Additional Data on the Web for station 01192050:


01192500 Hockanum River near East Hartford, CT

LOCATION.--Lat 41o46'59", long 72o35'16", Hartford County, Hydrologic Unit 01080205, on left bank at end of Preston Street, 0.2 mi upstream from bridge on Walnut Street, 1.5 mi downstream from Hop Brook, and 2.8 mi east of East Hartford.
DRAINAGE AREA.--73.4 mi2.

WATER DISCHARGE RECORDS

PERIOD OF RECORD.--September 1919 to September 1921, July 1928 to September 1971. Annual maximum, water years 1972-76. October 1976 to current year.
GAGE.--Water-stage recorder. Datum of gage is 53.60 ft above sea level (revised). Prior to October 1, 1981, datum in error by +0.90 ft, original levels by Department of Engineering, City of Hartford. Satellite telemetry at station.
REMARKS.--Records good except those for periods of ice effect, which are fair. Flow regulated by Shenipsit Lake, small reservoirs, and industrial plants.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water years 1954-55, 1961-62, 1968-69 , October 1991 to current year.
REMARKS.--The instantaneous record values will not necessarily fall within the corresponding daily range of the continuous records.

Additional Data on the Web for station 01192500:


01192704 Mattabesset River at Rt 372 at East Berlin, CT


LOCATION.--Lat 41o36'29", long 72o42'56", Hartford County, Hydrologic Unit 01080205, on right bank just upstream from bridge on Route 372, and on the Hartford-Middlesex County line.
DRAINAGE AREA.--48.1 mi2.
PERIOD OF RECORD.--March 1995 to current year.

Additional Data on the Web for station 01192704:


01192883 Coginchaug River at Middlefield, CT

LOCATION.--Lat 41o31'12", long 72o42'23", Middlesex County, Hydrologic Unit 01080205, on right bank just upstream from Cider Mill Road, 0.5 mi northeast of Middlefield, and 0.75 mi upstream from Wadsworth Falls.
DRAINAGE AREA.--29.8 mi2.
PERIOD OF RECORD.--October 1961 to December 1980, published as "at Rockfall", December 1980 to current year.
REVISED RECORDS.--WDR CT-83-1: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 134.17 ft above sea level. Prior to Dec. 2, 1980, water-stage recorder at site 2.0 mi downstream at datum 73.01 ft lower.
REMARKS.--Records good except those for periods of estimated record, which are poor. Infrequent regulation from Beseck Lake.

      Additional Data on the Web for station 01192883:

01193000 Connecticut River near Middletown, CT

LOCATION.--Lat 41o33'40", long 72o36'43", Middlesex County, Hydrologic Unit 01080205, on right bank 0.5 mi upstream from Bodkin Rock, 2 mi downstream from Middletown, and 29.5 mi upstream from mouth.
DRAINAGE AREA.--10,887 mi2.
PERIOD OF RECORD.--October 1965 to current year. Jan. 1, 1947, to Sept. 30, 1948, twice daily readings on outside staff gage, and Sept. 8, 1948, to Oct. 14, 1965, infrequent discharge measurements at high stages and continuous graphic record of stage.
REVISED RECORDS.-- WDR CT-83-1: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 10.00 ft below sea level. Auxiliary digital water-stage recorder at same datum on right bank 3.8 mi downstream, 120 ft downstream from pier of United Aircraft Corporation (formerly Connecticut Advanced Nuclear Engineering Laboratory, CANEL).
REMARKS.--Prior to 1994 water year, volume discharge records are available. Telephone gage-height telemeter at this station.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 186,000 ft3/s June 2, 1984, gage height, 31.27 ft.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge, 267,000 ft3/s Mar. 21, 1936, gage height, 38.2 ft, from rating curve extended above 125,000 ft3/s on basis of stage and discharge determinations of 1927, 1936, and 1938 floods. Peak discharges for floods dating back to 1814 are available in the office at Hartford, Conn.

      Additional Data on the Web for station 01193000:

01193050 Connecticut River at Middle Haddam, CT


LOCATION.--Lat 41o32’30”, long 72o33’13”, Middlesex County, Hydrologic Unit 01080205, on pier of United Technologies Corporation (formerly Connecticut Advanced Nuclear Engineering Laboratory, CANEL), 0.8 mi south of Middle Haddam, 7.6 mi upstream from Salmon River, and 6.1 mi south of Middletown.
DRAINAGE AREA.--10,897 mi2 rev.
PERIOD OF RECORD.--Water year 1967 to current year.
PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: October 1967 to September 1970, October 1973 to June 1976, June 1978 to current year.
pH: October 1967 to September 1970, October 1973 to June 1976, June 1978 to current year.
WATER TEMPERATURES: October 1967 to September 1970, October 1973 to June 1976, June 1978 to current year.
DISSOLVED OXYGEN: October 1967 to September 1970, October 1973 to June 1976, June 1978 to September 1997.
INSTRUMENTATION.--Water-quality monitor October 1967 to current year.
REMARKS.--USGS water-quality monitoring system installed June 1978. Interruptions of the record due to malfunctions of the instrument. The instantaneous record values will not necessarily fall within the corresponding daily range of the continuous records due to the depth and location of the probes used for the monitoring system. Stream tidal affected. Extremes for period of daily record and current year are only for those values reported.
EXTREMES FOR PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: Maximum, 483 microsiemens Aug. 18, 1975; minimum, 33 microsiemens March 23, 1980.
pH: Maximum, 9.7 units July 3, 1975; minimum, 4.9 units Apr. 23, 1976.
WATER TEMPERATURES: Maximum, 33.0oC July 12, 1970; minimum, 0.0oC on many days during winter periods.
DISSOLVED OXYGEN: Maximum, 19.2 mg/L Feb. 17, 1980; minimum 0.6 mg/L Aug. 11, 1970.

Additional Data on the Web for station 01193050:


01193500 SALMON RIVER NEAR EAST HAMPTON, CT

LOCATION.--Lat 41o32'53", long 72o26'59", Middlesex County, Hydrologic Unit 01080205, on left bank at Route 16 Bridge, 450 ft downstream from New London-Middlesex County line, 300 ft downstream from Comstock Bridge, 0.7 mi downstream from Dickinson Creek, and 3.5 mi southeast of East Hampton.
DRAINAGE AREA.--100 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--July 1928 to current year.
REVISED RECORDS.--WSP 1201: 1929. WDR CT-78-1: 1976 (P). WDR CT-83-1: Drainage area.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 64.38 ft above sea level. Prior to June 23, 1974, at datum 2.99 ft higher for site and datum then in use; prior to May 20, 1980, at datum 2.80 ft higher and at site 400 ft upstream; prior to June 24, 1987, at datum 0.67 ft lower for site and datum then in use. Satellite telemetry at station.
REMARKS.--No estimated daily discharges. Records good. Slight regulation at low flow by ponds upstream.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--September 1953, April 1954, October 1960 to September 1961, June 1968 to current year.
PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: March 1975 to September 1993 .
pH: December 1984 to September 1992.
WATER TEMPERATURES: March 1975 to April 1993 .
DISSOLVED OXYGEN: January 1985 to September 1992 .
SUSPENDED-SEDIMENT DISCHARGE: January 1982 to September 1986, October 1987 to September 1990.
INSTANTANEOUS SUSPENDED-SEDIMENT DISCHARGE: March 1987 to September 1987.
INSTRUMENTATION.--Water-quality 2-channel mini-monitor March 1975 to September 1984, August 1993 to September 1993.
Water-quality 4-channel mini-monitor October 1984 to April 1993.
REMARKS.--Unpublished records of iron, specific conductance, and pH of daily samples for 1960-61 available in the office at East Hartford, Conn. Instantaneous records are representative of the cross section while continuous records are based on point samples. The instantaneous record values will not necessarily fall within the corresponding daily range of the continuous records .
EXTREMES FOR PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: Maximum, 257 microsiemens Jan. 1, 1990; minimum, 23 microsiemens February 23, 1978.
pH: Maximum, 8.8 units Oct. 14, 1985, Aug. 9, 18, 19, 1987; minimum 6.2 units Dec. 19, 1986, Jan. 24, March 13, Sept. 30, 1992.
WATER TEMPERATURES: Maximum, 32.0oC Aug. 2, 1975; minimum, 0.0oC on many days during winter periods.
DISSOLVED OXYGEN: Maximum, 17.1 mg/L March 9, 1986; minimum 0.2 mg/L Dec. 3, 1986.
SEDIMENT CONCENTRATIONS: Maximum daily mean, 3,870 mg/L June 6, 1982; minimum daily mean, 0 mg/L on numerous days.
SEDIMENT LOADS: Maximum daily, 95,400 tons June 6, 1982; minimum daily, 0 tons on numerous days.

Additional Data on the Web for station 01193500:


01193750 Connecticut River at East Haddam, CT

LOCATION.--Lat 41o27’05”, long 72o27’55”, Middlesex County, Hydrologic Unit 01080205, at bridge on State Highway 82, at East Haddam, 1.1 mi downstream from Salmon River and 3.7 mi upstream from Chester Creek.
DRAINAGE AREA.--11,092 mi2.
PERIOD OF RECORD.--Water years 1968, 1974 to current year.
REMARKS.--Stream tidal affected.

Additional Data on the Web for station 01193750:

 

01194500 East Branch Eightmile River near North Lyme, CT

LOCATION.--Lat 41° 25'40", long 72° 20'05", New London County, Hydrologic Unit 01080205, on left bank at State Rt. 156 bridge,0.7 mi south of intersection of State Rt. 82, 0.4 mi upstream from confluence of Eightmile River, and 5.5 mi above mouth.

DRAINAGE AREA.--22.3 mi2                                                                                                              
PERIOD OF RECORD.--September 1937 to 1981, August 30, 2001 to current year.  

GAGE.--Water-stage recorder. Datum of gage is 53.97 ft above sea level. Prior to Oct. 1, 1964, at datum 1.00 ft higher. Satellite telemetry at station.

REMARKS.--Records good, except those for periods of estimated record, which are fair.

Additional Data on the Web for station 01194500:

 

 

01194796 Connecticut River at Old Lyme, CT

LOCATION.--Lat 41o18'45", long 72o20'47", New London County, Hydrologic Unit 01080205, on left bank at Connecticut Department of Environmental Protection Marine Headquarters boat dock gas house, 1000 feet upstream from railroad bridge, near mouth of Connecticut River.
DRAINAGE AREA.--11,224 mi2.
PERIOD OF RECORD.--June 1976 to current year
GAGE.--Water-stage recorder. Datum of reference gage is sea level. Prior to Feb. 1978, at site at Lynde Point, at datum 9.68 ft below sea level. Prior to June 1998, at site in jetty lighthouse at the mouth of the Connecticut River, at datum 4.56 feet below sea level. Telephone telemetry at station.
REMARKS.--Stage data in feet at 5-minute intervals available upon request. Station was relocated from Old Saybrook (gage 01194825) to Old Lyme during June 1998.

    Additional Data on the Web for station 01194796:

01195100 Indian River near Clinton, CT

LOCATION.--Lat 41o18'21", long 72o31'54", Middlesex County, Hydrologic Unit 01100004, on right downstream side of bridge at Hurd Bridge Road, 2.0 mi north of Clinton.
DRAINAGE AREA.--5.68 mi2.
PERIOD OF RECORD.--July 1961 to September 1973, occasional low-flow measurements. November 1981 to current year.
REVISED RECORDS.--WDR CT-83-1: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 34.81 ft above sea level.
REMARKS.--Records good except those for periods of estimated daily discharges, which are fair.

      Additional Data on the Web for station 01195100:

01195490 Quinnipiac River at Southington, CT

LOCATION.--Lat 41o36'06", long 72o53'03", Hartford County, Hydrologic Unit 01100004, on west bank, 400 ft downstream of bridge on Mill Street, and 500 ft upstream of bridge on Center Street in Southington.
DRAINAGE AREA.--17.4 mi2.
PERIOD OF RECORD.--November 1987 to current year.
GAGE.--Water-stage recorder. Datum of gage is 138.47 ft above sea level. Telephone telemetry at station.
REMARKS.--Records good except those for periods with ice effect, which are fair.

      Additional Data on the Web for station 01195490:

01196222 Quinnipiac River Near Meriden, CT

LOCATION.--Lat 41o31’45”, long 72o51’50”, New Haven County, Hydrologic Unit 01100004, at bridge on Cheshire Street, 3 mi west of Meriden, and 1.7 mi upstream from Hanover Pond.
DRAINAGE AREA.--69.6 mi2.
PERIOD OF RECORD.--Water year 1974 to current year.
REMARKS.--The instantaneous record values will not necessarily fall within the corresponding daily range of the continuous records.

Additional Data on the Web for station 01196222:


01196500 Quinnipiac River at Wallingford, CT

LOCATION.--Lat 41o26'58", long 72o50'29", New Haven County, Hydrologic Unit 01100004, on right bank on Wilbur Cross Highway, 0.8 mi downstream from bridge on Quinnipiac Street in Wallingford, and 2 mi upstream from Wharton Brook.
DRAINAGE AREA.--115 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--October 1930 to current year.
REVISED RECORDS.--WDR CT-83-1: Drainage area.
GAGE.--Water-stage recorder, crest-stage gage, and timber control. Datum of gage is 19.24 ft above sea level. Prior to Jan. 27, 1965, at datum 1.00 ft higher. Satellite telemetry at station.
REMARKS.--Records good except for those periods of ice effect, which is fair. Flow regulated by Wolcott Reservoir, Broad Brook Reservoir, and by mills upstream. Diversion from Wolcott Reservoir for municipal supply of New Britain and diversion into the basin from Merimere and Elmere Reservoirs for municipal supply of Meriden.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water years 1953-54, 1957, 1968 to current year.
PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: November 1969 to December 1970.
WATER TEMPERATURES: November 1969 to December 1970.
REMARKS.--Records of iron, specific conductance, and pH of daily samples for 1956-57 are available in Connecticut Office at East Hartford, Conn. The instantaneous record values will not necessarily fall within the corresponding daily range of the continuous records.
EXTREMES FOR PERIOD OF RECORD.--
SPECIFIC CONDUCTANCE: Maximum recorded, 530 microsiemens July 16, 1970; minimum recorded, 47 microsiemens July 4, 1970.
WATER TEMPERATURES: Maximum, 31.0oC July 28, 1970; minimum, 0.0oC on many days during winter periods.

Additional Data on the Web for station 01196500:


01196530 Quinnipiac River at North Haven, CT

LOCATION.--Lat 41o23’24”, long 72o52’19”, New Haven County, Hydrologic Unit 01100004, at bridge on U.S. Highway 5, at North Haven,
2.3 mi downstream from Wharton Brook and 0.9 mi upstream from Watermans Brook.
DRAINAGE AREA.--128 mi2.
PERIOD OF RECORD.--Water year 1974 to current year.
REMARKS.--Stream tidal affected.

Additional Data on the Web for station 01196530:


01196620 Mill River near Hamden, CT

LOCATION.--Lat 41o25'15", long 72o54'12", New Haven County, Hydrologic Unit 01100004, 150 ft downstream from bridge on Mount Carmel Avenue, 0.4 mi downstream from Eatons Brook, and 2.5 mi north of Hamden.
DRAINAGE AREA.--24.5 mi2.
PERIOD OF RECORD.--October 1968 to September 1970, October 1978 to current year.
GAGE.--Water-stage recorder and broad-crested concrete weir. Datum of gage is 82.57 ft above sea level. October 1, 1968, to September 30, 1970, 150 ft upstream at datum 0.73 ft higher.
REMARKS.--Records good except those for periods with ice effect, which are fair.

      Additional Data on the Web for station 01196620:

01198125 Housatonic River near Ashley Falls, MA

LOCATION.--Lat 42o04’29”, long 73o20’02”, Berkshire County, Hydrologic Unit 01100005, 2.5 mi downstream from Soda Creek,
3.1 mi upstream from Konkapot River.
DRAINAGE AREA.--465 mi2.
PERIOD OF RECORD.--October 1991 to current year.
SUSPENDED-SEDIMENT CONCENTRATION: March 1994 to September 1995.
SUSPENDED-SEDIMENT DISCHARGE: March 1994 to September 1995.
EXTREMES FOR PERIOD OF RECORD.--
SUSPENDED-SEDIMENT CONCENTRATION: Maximum daily mean, 94 mg/L, March 9, 1995, minimum daily mean, 1 mg/L
on several days.
SUSPENDED-SEDIMENT DISCHARGE: Maximum daily, 962 tons, April 8, 1994, minimum daily 0.41 tons, Aug. 25, 1995.

        Additional Data on the Web for station 01198125:


01198990 Falls Village Reservoir at Falls Village, CT

LOCATION.--Lat 41o57'45", long 73o22'18", Litchfield County, Hydrologic Unit 01100005, on Housatonic River at Great Falls, 0.4 mi upstream from hydroelectric plant of Connecticut Light and Power Company and gaging station at Falls Village, 0.9 mi downstream from Hollenbeck River and 2.0 mi upstream from Salmon Creek.
DRAINAGE AREA.--633 mi2.
PERIOD OF RECORD.--Water years 1921, 1956 to current year.
WATER-QUALITY RECORDS: August 8, 1984
PERIOD OF DAILY RECORD.--
WATER TEMPERATURES: October 1955 to current year.
COOPERATION.--Records were furnished by the Connecticut Light and Power Company.
EXTREMES FOR PERIOD OF DAILY RECORD.--
     WATER TEMPERATURES: Maximum daily, 27.5oC Aug 1, 1999; minimum daily, 0.0oC on many days during winter periods.

        Additional Data on the Web for station 01198990:


01199000 Housatonic River at Falls Village, CT

LOCATION.--Lat 41o57'26", long 73o22'11", Litchfield County, Hydrologic Unit 01100005, on left bank at hydroelectric plant of Connecticut Light and Power Company at Falls Village, 1.4 mi downstream from Hollenbeck River, and at mile 75.9.
DRAINAGE AREA.--634 mi2.
PERIOD OF RECORD.--Discharge: July 1912 to current year.
Water-quality records: Water years 1974-80.
REVISED RECORDS.--WSP 781: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 529.06 ft above sea level (levels by Corps of Engineers). Prior to Oct. 26, 1964, at site 0.6 mi downstream at datum 6.72 ft lower.
REMARKS.--Records good except those for periods of with ice effect, which are fair. Low flow completely regulated by power plant of Connecticut Light and Power Company. High flow is regulated by flood-control reservoirs from 20.5 mi2 in the Blackberry River basin, but does not affect monthly runoff appreciably.

      Additional Data on the Web for station 01199000:

01199050 Salmon Creek at Lime Rock, CT

LOCATION.--Lat 41o56'32", long 73o23'29", Litchfield County, Hydrologic Unit 01100005, on left bank 300 ft upstream from bridge on Uptown Salisbury Road, 0.6 mi north of Lime Rock, and 3.0 mi upstream from mouth.
DRAINAGE AREA.--29.4 mi2.
PERIOD OF RECORD.--October 1961 to current year.
GAGE.--Water-stage recorder. Datum of gage is 620.37 ft above sea level. Satellite telemetry at station.
REMARKS.--Records good except for periods of estimated record, which are fair.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Aug. 19, 1955, reached a stage of about 13.5 ft, from floodmarks,
discharge 6,300 ft3/s, from rating curve extended above 350 ft3/s on basis of contracted-opening measurement of peak flow.

      Additional Data on the Web for station 01199050:

01200000 Tenmile River near Gaylordsville, CT

LOCATION.--Lat 41o39'32", long 73o31'44", Dutchess County, New York, Hydrologic Unit 01100005, on right bank 0.1 mi downstream from Deuel Hollow Brook, 1.2 mi upstream from New York-Connecticut State line, 1.7 mi upstream from mouth, and 2.5 mi northwest of Gaylordsville.
DRAINAGE AREA.--203 mi2.
PERIOD OF RECORD.--Discharge: October 1929 to September 1987, October 1991 to current year. Monthly discharge only for period October to December 1929, published in WSP 1301.
Partial record site: October 1987 to September 1991.
Water-quality records: Water years 1959, 1968, 1973-75, 1980.
Daily water temperature: Water year 1959.
Daily specific conductance: Water years 1958-59.
Daily pH: Water years 1958-59.
Daily iron: Water years 1958-59.
REVISED RECORDS.--WSP 1201: 1939. WSP 1701: 1955-56, 1957(M), 1958-59. WSP 1901: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 304.4 ft above sea level, (levels by Connecticut Light and Power Company).
REMARKS.--Records good except those for periods with ice effect, which are poor. Infrequent regulation at low flow.

      Additional Data on the Web for station 01200000:

01200500 Housatonic River at Gaylordsville, CT

LOCATION.--Lat 41o39'11", long 73o29'25", Litchfield County, Hydrologic Unit 01100005, on left bank 0.4 mi downstream from hydroelectric plant of Connecticut Light and Power Co., 0.5 mi upstream from bridge on U.S. Route 7 at Gaylordsville, 1.5 mi downstream from Tenmile River, and at mile 50.6.
DRAINAGE AREA.--996 mi2.
PERIOD OF RECORD.--Discharge: October 1900 to December 1904 (fragmentary), January 1905 to December 1908 (gage heights only), January 1909 to December 1912 (fragmentary), January 1913 to October 1914 (gage heights only), November 1914 (fragmentary), July 1940 to current year.
Water-quality records: Water years 1960, 1968.
Daily water temperature: Water years 1960, 1968.
Daily suspended-sediment discharge: Water years 1979-80.
REVISED RECORDS.--WDR CT-83-1: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 236.78 ft above sea level. October 1900 to November 1914, non-recording gage on covered bridge 0.6 mi downstream at different datum. Telephone telemetry at station.
REMARKS.--Records good except those for periods of estimated daily discharges, which are fair. Ordinary flow regulated by power plant upstream. High flow is regulated by flood-control reservoirs in 20.5 mi2 of the Blackberry River basin, but flood control does not affect monthly runoff appreciably.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood in May 1854 reached a stage of 21 ft 3 in, former site and datum; reported by observer in 1902. Flood of Sept. 22, 1938, reached a stage of 14.5 ft, from floodmarks, at present site, discharge, 37,000 ft3/s, by computation of peak flow over dam 2.5 mi upstream adjusted for flow from intervening area.

      Additional Data on the Web for station 01200500:

01200600 Housatonic River near New Milford, CT

LOCATION.--Lat 41o35’35”, long 73o27’00”, Litchfield County, Hydrologic Unit 01100005, at Boardman Bridge, 2.3 mi northwest of New Milford, 6.9 mi downstream from Tenmile River, 1.9 mi upstream from Aspetuck River and 4.7 mi upstream from Still River.
DRAINAGE AREA.--1,022 mi2.
PERIOD OF RECORD.--Water years 1962, 1963, 1974 to 1991, 1995 to current year.

Additional Data on the Web for station 01200600:

01201487 Still River at Rt 7 at Brookfield Center, CT

LOCATION.--Lat 41o27’58”, long 73o24’13”, Fairfield County, Hydrologic Unit 01100005, on bridge on the upstream side of Route 7 South, approximately 800 ft upstream of Silvermine Road.
DRAINAGE AREA.--62.3 mi2.
PERIOD OF RECORD.--October 1983 to current year.
REMARKS.--Water-quality records for this site published under station 01201485 from water year 1984 to water year 1992.

Additional Data on the Web for station 01201487:

01202501 Shepaug River at Dam at Woodville, CT

LOCATION.--Lat 41o71’92”, long 73o29’33”, Litchfield County, Hydrologic Unit 01100005, on upstream side of Peter's Dam, 0.2 mi downstream from Shepaug Reservoir Dam, at end of Reservoir Rd., 1 mi north of Woodville.
DRAINAGE AREA.--38.1 mi2.
PERIOD OF RECORD.--August 2000 to current year.
GAGE.--Water-stage recorder and crest-stage gage. Satellite telemetry at station.
REMARKS.--Records good, except those for periods of estimated record, which are fair. Flow regulated by Shepaug Reservoir.

Additional Data on the Web for station 01202501:

 

 

01203000 Shepaug River near Roxbury, CT


LOCATION.--Lat 41o32’59”, long 73o19’49”, Litchfield County, Hydrologic Unit 01100005, on right bank at downstream side of Wellers Bridge 0.5 mi south of Roxbury Station, 1.2 mi southwest of village of Roxbury, and 2.4 mi upstream from Jacks Brook.
DRAINAGE AREA.--132 mi2.
PERIOD OF RECORD.--Water years 1953-54, 1959, 1974 to current year.
PERIOD OF DAILY RECORD.--
WATER TEMPERATURES: October 1958 to September 1959.
REMARKS.--Records of daily discharge from October 1930 to September 1971 in reports of the U.S. Geological Survey. The instantaneous record values will not necessarily fall within the corresponding daily range of the continuous records.
EXTREMES FOR PERIOD OF RECORD.--
WATER TEMPERATURES: Maximum, 25.0oC Aug. 17, 1959; minimum, 0.0oC Dec. 14, 1958.

Additional Data on the Web for station 01203000:


01203600 Nonewaug River at Minortown, CT

LOCATION.--Lat 41o34'32", long 73o10'57", Litchfield County, Hydrologic Unit 01100005, on right bank, 1000 ft downstream from bridge at Minortown, and 2 1/2 mi northeast of Woodbury.
DRAINAGE AREA.--17.7 mi2.
PERIOD OF RECORD.--August 1962 to September 1976, September 1978 to September 1979, and August 2000 to September 2000.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 354.69 ft above sea level. Satellite telemetry at station.
REMARKS.--Records good except those for periods with ice effect, which are fair.

     Additional Data on the Web for station 01203600:

01203805 Weekeepeemee River at Hotchkissville, CT

LOCATION.--Lat 41o33'26", long 73o12'57", Litchfield County, Hydrologic Unit 01100005, on left bank at downstream side of bridge on Jack's Bridge Road, 1 mi north of Woodbury.
DRAINAGE AREA.--26.8 mi2.
PERIOD OF RECORD.--October 1978 to September 1979 and August 2000 to September 2000.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 249.55 ft above sea level. Satellite telemetry at station.
REMARKS.--Records good except those for periods with ice effect, which are fair. 

     Additional Data on the Web for station 01203805:

01204000 Pomperaug River at Southbury, CT

LOCATION.--Lat 41o28'50", long 73o13'30", New Haven County, Hydrologic Unit 01100005, on right bank 200 ft upstream from bridge on Poverty Road, 800 ft downstream from Bullet Hill Brook, 0.6 mi west of Southbury, and 5.8 mi upstream from mouth.
DRAINAGE AREA.--75.1 mi2.
PERIOD OF RECORD.--Discharge: June 1932 to current year.
Water-quality records: Water years 1961, 1965-74.
Daily water temperature: Water years 1961, 1967.
Daily specific conductance: Water years 1960-61.
Daily pH: Water years 1960-61.
Daily iron: Water years 1960-61.
REVISED RECORDS.--WSP 851: 1934(M), 1936(M). WSP 1201: 1933-34, 1935(M), 1937(M). WDR CT-83-1: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 165.60 ft above sea level, (levels by Corps of Engineers). Satellite telemetry at station.
REMARKS.--Records good except those for periods of estimated daily discharges, which are fair. Flow regulated by Lockwood Reservoir and occasionally at low flow by mill upstream. Diversion for municipal supply of town of Watertown.

Additional Data on the Web for station 01204000:

01205500 Housatonic River at Stevenson, CT

LOCATION.--Lat 41o23'02", long 73o10'05", New Haven County, Hydrologic Unit 01100005, on left bank, 0.2 mi downstream from dam of Connecticut Light and Power Company at Stevenson, Fairfield County, 0.2 mi upstream from Eightmile Brook, and at mile 19.2.
DRAINAGE AREA.--1,544 mi2.

WATER-DISCHARGE RECORD

PERIOD OF RECORD.--August 1928 to current year.
REVISED RECORDS.--WSP 711: 1929(M). WSP 1231: 1951. WSP 1301: 1933-34(M), 1936-37. WDR CT-83-1: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 24.98 ft above sea level (levels by Corps of Engineers). Telephone telemetry at station. Satellite telemetry at station.
REMARKS.--No estimated daily discharges. Records good. Ordinary flow completely regulated by Stevenson Hydroelectric Plant. Flow regulated by Lake Candlewood, Lake Lillinonah, Lake Zoar, Cairns and Shepaug Reservoirs, and by diversion out of basin at Shepaug Reservoir. High flows affected by flood control in the Blackberry River basin for 20.5 mi2, but do not appreciably affect monthly runoff.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water years 1952-53, 1955-56, 1959, 1961, 1963, 1968 to current year.
PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: November 1974 to September 1981.
WATER TEMPERATURES: November 1974 to September 1981.
EXTREMES FOR PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: Maximum recorded, 390 microsiemens Sept. 14, 1977; minimum recorded, 46 microsiemens Mar. 25, 1980.
WATER TEMPERATURES: Maximum recorded, 30.5oC Aug. 3, 6-9, 1976; minimum, 0.0oC many days during the winter period.

Additional Data on the Web for station 01205500:

01206900 Naugatuck River at Thomaston, CT

LOCATION.--Lat 41o40'25", long 73o04'12", Litchfield County, Hydrologic Unit 01100005, on left bank at downstream side of bridge on U.S. Routes 6 and 202 at Thomaston, 1.5 mi downstream from Thomaston Reservoir, 2.5 mi upstream from Branch Brook, and at mile 29.5.
DRAINAGE AREA.--99.8 mi2.
PERIOD OF RECORD.--October 1959 to current year.
REVISED RECORDS.--WDR CT-76-1: 1975. WDR CT-83-1:Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 354.39 ft above sea level. Telephone telemetry at station. Satellite telemetry at station.
REMARKS.--Records good except those periods of estimated record, which are fair. Slight diurnal fluctuation at low flow. Flow regulated by Thomaston, Hall Meadow Brook and East Branch Detention Reservoirs, and Lake Winchester. .
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Aug. 19, 1955, reached a stage of 27.0 ft, from floodmarks by Corps of Engineers, discharge, 53,400 ft3/s, from indirect measurements of peak flow on Naugatuck River, 71.9 mi2, and Leadmine Brook, 24.0 mi2, adjusted for intervening drainage area.

         Additional Data on the Web for station 01206900:

01208049 Naugatuck River Near Waterville, CT

LOCATION.--Lat 41o36’55”, long 73o03’30”, New Haven County, Hydrologic Unit 01100005, at Frost Bridge 1.8 mi north of Waterville and 2.4 mi south of Branch Brook.
DRAINAGE AREA.--136 mi2.
PERIOD OF RECORD.--October 5, 1967, published as “near Waterbury,” October 1980 to current year.

Additional Data on the Web for station 01208049:

01208370 Naugatuck River below Fulling Mill Brook at Union City, CT

LOCATION.--Lat 41o30’06”, long 73o02’55”, New Haven County, Hydrologic Unit 01100005, at footbridge below Fulling Mill Brook, 0.1.mi south of Rt. 68 bridge.
DRAINAGE AREA.--215 mi2.
PERIOD OF RECORD.--May 2002 to Sept. 30, 2002.

Additional Data on the Web for station 01208370:

01208500 Naugatuck River at Beacon Falls, CT

LOCATION.--Lat 41o26'32", long 73o03'47", New Haven County, Hydrologic Unit 01100005, on left bank at downstream side of bridge on Bridge Street at Beacon Falls, 0.4 mi upstream from Bronson Brook, and at mile 10.1.
DRAINAGE AREA.--260 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--June 1918 to September 1924, September 1928 to September 1955, published as "near Naugatuck," October 1955 to current year.
REVISED RECORDS.--WSP 1171: 1918-24, 1928-49. WSP 1501: 1956 (P). WDR CT-83-1: Drainage area.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 117.28 ft above sea level. Prior to Oct. 1, 1955, water-stage recorder at site 2.5 mi upstream at datum 37.89 ft higher. Oct. 1, 1955, to Mar. 21, 1957, non-recording gage at present site and datum. Telephone telemetry at station. Satellite telemetry at station.
REMARKS.--Records good. Flow regulated by Lake Winchester, Hall Meadow Brook, East Branch, Thomaston, Pitch, Morris, and Wigwam Reservoirs, Northfield Brook, Hancock Brook, Hop Brook, and Black Rock Lakes, and during low flow, by industrial plants upstream. Flow increased by diversion from Shepaug Reservoir into Naugatuck River basin. Town of Watertown diverts about 0.5 Mgal/d from Pomperaug River basin into Naugatuck River about 10 mi upstream.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood in November 1927 reached a stage of 14 ft, former site and datum, discharge, about 26,000 ft3/s.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water years 1952, 1953, 1958, published as “near Naugatuck,” 1961, 1963, 1966, 1968, 1974 to current year.