Pequannock River at Macopin Intake Dam, Passaic County NJ (MCPN4)
Gage Location: Passaic County, New JerseySite Location: Passaic County, New Jersey
Latitude: 41.018Longitude: -74.402Elevation: 549.17 ft. MSLDrainage Area: 64 Sq. Mi.
Minor Stage: 5.5 ft. Moderate Stage: 6.5 ft.Major Stage: 7.5 ft.
First Flood: 1903-10-10Last Flood: 2014-05-01 Crest: 6.07 ft.Datum change: 1992-09-01Number of Floods: 39

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Date of FloodCrest(ft)Streamflow(cfs)CategoryCode
1903-10-1017.46100MissingC1 F2 G1
1968-05-2915.72510MinorC1 F2 G1
1969-08-06151370MinorC1 F2 G1
1970-04-0315.21670MinorC1 F2 G1
1972-06-2315.331800MinorC1 F2 G1
1973-02-0315.31750MinorC1 F2 G1
1978-03-2715.271700MinorC1 F2 G1
1983-03-1915.371850MinorC1 F2 G1
1984-04-0516.94880MissingC1 F2 G1
1986-04-2715.081450MinorC1 F2 G1
1987-04-0515.161570MinorC1 F2 G1
1989-05-1715.251710MinorC1 F2 G1
1993-03-295.821130MinorF2 G1
1994-03-245.53970MinorF2
1996-01-196.311960MinorF2
1996-10-206.732350ModerateF2
1998-05-115.971600MinorF2
2001-03-225.81410MinorC3 F2
2003-03-256.311940MinorF2
2003-06-015.571153MinorF2
2003-12-125.781390MinorF2
2005-03-295.591170MinorF2
2005-04-036.121760MinorF2
2006-01-195.681280MinorF2
2007-04-166.382010MinorF2
2008-02-145.541120MinorF2
2008-03-095.671290MinorF2
2010-01-265.531130MinorF2
2010-03-157.53100MajorF2
2010-03-315.591200MinorF2
2011-03-075.931580MinorF2
2011-03-117.172790ModerateF2
2011-04-175.731350MinorF2
2011-05-195.651320MinorF2
2011-06-245.61250MinorF2
2011-08-287.424360ModerateF2
2011-09-086.071730MinorF2
2012-12-216.392030MinorF2
2014-05-016.071880MinorF2



Codes and description

C1|Crest information during this period may be incomplete and therefore was not used in frequency calculations. Some of the floods are based on current flood stage and nearby gage information.
C2|Crest information during this period 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: 07:31 AM Dec 19, 2014