Raritan River below Calco Dam at Bound Brook, Somerset County NJ (BDKN4)
Gage Location: Somerset County, New Jersey	Site Location: Somerset County, New Jersey
Latitude: 40.551	Longitude: -74.548	Elevation: -9999 ft. MSL	Drainage Area: 785 Sq. Mi.
Minor Stage: 28 ft.	Moderate Stage: 30 ft.	Major Stage: 33 ft.
First Flood: 1882-09-24	Last Flood: 2011-12-08 Crest: 28.59 ft.	Datum change: 1966-10-01	Number of Floods: 67

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MINOR FLOODS Date of Flood Crest(ft) 1968-05-30 29.32 1971-09-13 28.22 1973-06-30 29 1975-03-20 28.19 1975-07-21 29.24 1975-09-25 29.09 1977-03-23 29.95 1980-03-22 29.8 1981-05-12 28.27 1983-04-11 28.18 1983-12-14 29.62 1986-04-17 28.95 1986-12-25 29.36 1987-04-05 29.36 1989-10-21 28.13 1992-12-12 28.91 1994-03-11 29.47 1996-01-28 28.39 1996-12-02 28.9 1996-12-14 28.43 1999-03-22 28.36 2004-09-29 28.79 2005-10-09 29.2 2006-06-29 28.24 2006-11-09 29.42 2007-03-02 28.16 2007-04-27 28.07 2008-02-14 29.69 2009-12-27 28.54 2010-03-31 29.11 2011-03-07 28.4 2011-03-11 28.49 2011-09-07 29.04 2011-12-08 28.59

MODERATE FLOODS Date of Flood Crest(ft) 1970-04-03 31.02 1972-06-23 30.11 1972-11-09 30.13 1973-02-03 30.47 1973-08-02 30.37 1973-12-21 31.73 1975-07-14 30.27 1978-01-26 31.33 1979-01-22 30.91 1979-02-26 31.18 1982-01-05 30.03 1983-04-16 31.84 1984-04-05 30.94 1984-05-30 30.5 1984-07-07 32 1989-09-21 30.22 1994-01-29 30 2003-12-12 30.02 2005-04-03 30.54 2005-10-12 30.64 2008-03-09 30.06 2008-12-12 30.35 2011-04-17 31.1

MAJOR FLOODS Date of Flood Crest(ft) 1971-08-28 37.47 1979-01-25 33.18 1996-01-20 33.34 1996-10-20 35.58 1999-09-17 42.13 2007-04-16 38.3 2010-03-14 36.04 2011-08-28 41.9 2011-09-08 33.14

MISSING Date of Flood Crest(ft) 1882-09-24 -9999

Categorical Floods by Month Month Minor After Datum Minor Total Moderate After Datum Moderate Total Major After Datum Major Total Missing After Datum Missing Total January 1 1 4 4 2 2 0 0 February 1 1 2 2 0 0 0 0 March 9 9 1 1 1 1 0 0 April 4 4 5 5 1 1 0 0 May 2 2 1 1 0 0 0 0 June 2 2 1 1 0 0 0 0 July 1 1 2 2 0 0 0 0 August 0 0 1 1 2 2 0 0 September 4 4 1 1 2 2 0 1 October 2 2 1 1 1 1 0 0 November 1 1 1 1 0 0 0 0 December 7 7 3 3 0 0 0 0

Categorical Floods by Season Season Minor Moderate Major Missing Fall 7 3 3 1 Winter 9 9 2 0 Spring 15 7 2 0 Summer 3 4 2 0

Codes and description

C1|Crest information looks unreliable and incomplete and not used in frequency calculations. Some of the floods are based on current flood stage and nearby gage information.
C2|Crest information looks reliable despite potential problems. This data was used in frequency calculations.
C3|Crest height estimated by the USGS.
C4|Crest height is from the National Weather Service.
C5|Crest height affected by backwater.
C6|Crest occurred at a previous flood stage that is lower than the current flood stage. The crests below the new flood stage are not used in flood frequency calculations.
C7|Crest from USGS yearly peak and/or date is different than the crest we provide. In many cases MARFC uses crest based on backwater or ice effects.
C8|Crest month or day of occurrence has been estimated by The Middle Atlantic River Forecast Center usually based on nearby gage information.
C9|Crest date (day) in the month is unknown.
F1|Flow is an estimate.
F2|Flow affected by regulation or diversion and in some cases to an unknown degree.
F3|Flow effected by snow-melt, ice jam or debris jam break up.
F4|Flow affected by dam failure.
F5|Flow - All or part of the record affected by urbanization, mining, agricultural changes, channelization or other factors.
G1|Gage height at a different site and/or datum.
G2|Gage is not an official USGS gage with crests provided by the NWS. Crest information looks unreliable and incomplete and not used in flood frequency calculations.
G3|Gage datum changed during this year.
none,No code; Good Data

Updated: 08:09 AM Feb 08, 2013