Appomattox River at Matoaca, Chesterfield County VA (MTCV2)
Gage Location: Dinwiddie County, Virginia Site Location: Chesterfield County, Virginia
Latitude: 37.225Longitude: -77.475Elevation: 68.3 ft. MSLDrainage Area: 1342 Sq. Mi.
Minor Stage: 10 ft. Moderate Stage: 13 ft.Major Stage: 15 ft.
First Flood: 1971-05-31Last Flood: 2006-11-16 Crest: 10.29 ft.Datum change: 1969-10-30Number of Floods: 24

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MINOR FLOODS
Date of FloodCrest(ft)
1971-05-3110.7
1975-03-1912.31
1978-03-1211.98
1983-03-2110.61
1984-02-1612.63
1985-11-0612.07
1987-04-1812.04
1993-03-0611.32
1994-03-0411.1
1996-09-1211.17
1998-03-2111.97
1999-09-1611.58
2003-03-2310.37
2003-04-1110.14
2003-09-2012.87
2006-10-0910.73
2006-11-1610.29
MODERATE FLOODS
Date of FloodCrest(ft)
1971-10-2314.1
1972-06-2714.6
1979-02-2614.37
1979-10-0313.09
2003-05-2614.61
2004-08-3113.57
MAJOR FLOODS
Date of FloodCrest(ft)
1972-10-0718.39
MISSING
Date of FloodCrest(ft)



Categorical Floods by Month
MonthMinor
After
Datum
Minor
Total
Moderate
After
Datum
Moderate
Total
Major
After
Datum
Major
Total
Missing
After
Datum
Missing
Total
January00000000
February11110000
March77000000
April22000000
May11110000
June00110000
July00000000
August00110000
September33000000
October11221100
November22000000
December00000000


Categorical Floods by Season
SeasonMinorModerateMajorMissing
Fall6210
Winter1100
Spring10100
Summer0200


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