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

Click on table headers to sort
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
2012-12-218.523030MinorF2
2014-05-016.071880Minornone



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: 08:00 PM May 28, 2014