Opequon Creek near Martinsburg, Berkeley County WV (MBGW2)
Gage Location: Berkeley County, West Virginia	Site Location: Berkeley County, West Virginia
Latitude: 39.424	Longitude: -77.939	Elevation: 354.89 ft. MSL	Drainage Area: 273 Sq. Mi.
Minor Stage: 10 ft.	Moderate Stage: 12.5 ft.	Major Stage: 15 ft.
First Flood: 1936-03-18	Last Flood: 2013-01-31 Crest: 12.04 ft.	Datum change: 1947-07-23	Number of Floods: 139

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Date of Flood Crest(ft) Streamflow(cfs) Category Code 1936-03-18 17.5 19100 Major *** (B) 1948-12-17 10.27 2660 Minor none 1948-12-30 10.41 2700 Minor none 1950-05-19 10.36 2740 Minor none 1950-11-26 11.08 3950 Minor none 1950-12-04 14.12 9100 Moderate none 1951-04-13 10.98 3800 Minor none 1952-04-28 13.09 7190 Moderate none 1952-09-01 11.65 4700 Minor none 1952-11-22 13.12 6980 Moderate none 1955-08-13 11.13 3700 Minor none 1955-08-19 11.92 4900 Minor none 1959-06-03 11.54 4300 Minor none 1961-02-20 10.56 3110 Minor none 1961-04-13 10.67 3190 Minor none 1962-03-13 10.54 3030 Minor none 1963-03-20 10.77 3270 Minor none 1964-03-04 10.35 2910 Minor none 1965-03-05 10.9 3430 Minor none 1967-03-07 11.76 3740 Minor (F) 1968-03-17 10.27 2460 Minor none 1970-11-13 15.81 14000 Major none 1971-02-14 12.24 5430 Minor none 1971-05-31 11.02 3630 Minor none 1972-02-14 10.92 3520 Minor none 1972-06-22 17.45 19000 Major none 1972-06-30 12.71 6280 Minor none 1972-11-14 12.5 5900 Minor none 1972-11-20 11.28 3900 Minor none 1972-12-09 13.09 7000 Moderate none 1972-12-22 10.62 3220 Minor none 1973-04-28 10.41 3030 Minor none 1973-10-29 10.51 3170 Minor none 1973-12-27 11.01 3610 Minor none 1974-12-02 12.81 6680 Minor none 1975-03-20 11.64 4580 Minor none 1975-06-01 12.21 5540 Minor none 1975-07-21 12.83 6720 Minor none 1975-09-25 14.15 9460 Moderate none 1975-10-18 10.43 3050 Minor none 1976-01-01 12.08 5300 Minor none 1976-10-10 14.73 10900 Moderate none 1977-04-05 11.18 3910 Minor none 1978-01-26 10.44 3060 Minor none 1978-03-15 12.16 5450 Minor none 1978-03-27 10.89 3550 Minor none 1978-05-17 10.27 2900 Minor none 1978-08-07 13.5 8060 Moderate none 1979-01-22 10.61 3230 Minor none 1979-01-25 11.81 4860 Minor none 1979-02-26 12.54 6130 Minor none 1979-07-20 10.64 3260 Minor none 1979-10-11 11.58 4490 Minor none 1980-05-22 10.9 3560 Minor none 1982-06-14 12.98 7020 Minor none 1983-03-19 10.42 3040 Minor none 1983-04-10 11.03 3720 Minor none 1983-04-25 11.77 4790 Minor none 1984-02-15 14.99 11600 Moderate none 1984-02-24 10.44 3060 Minor none 1984-03-29 13.72 8500 Moderate none 1984-04-05 11.27 4040 Minor none 1984-04-15 10.14 2790 Minor none 1984-11-29 11.6 4520 Minor none 1985-02-13 12.99 7040 Minor none 1986-03-15 11.43 4260 Minor none 1987-04-05 10.67 3290 Minor none 1987-04-17 12.05 5250 Minor none 1988-05-07 11.15 3870 Minor none 1988-05-19 16.29 15500 Major none 1988-05-21 12.16 5450 Minor none 1990-10-13 14.07 9270 Moderate none 1990-10-23 11.64 4580 Minor none 1990-12-31 10.26 2890 Minor none 1991-03-24 11.5 4360 Minor none 1992-03-07 10.03 2700 Minor none 1992-04-22 15.27 12300 Major none 1992-12-11 11.59 4500 Minor none 1993-03-05 15.38 12600 Major none 1993-03-22 10.31 2930 Minor none 1993-03-24 11.07 3760 Minor none 1993-03-28 10.46 3080 Minor none 1993-04-02 10.42 3040 Minor none 1993-04-17 11.79 4810 Minor none 1993-04-22 10.37 2990 Minor none 1993-11-28 13.26 7510 Moderate none 1993-12-05 12.45 5970 Minor none 1994-02-25 10.94 3600 Minor none 1994-03-11 11.87 4940 Minor none 1994-03-29 11.58 4480 Minor none 1994-08-18 10.91 3570 Minor none 1995-01-16 10.81 -9999 Minor (F) 1995-10-22 11.25 4000 Minor none 1996-01-20 18.76 23400 Major none 1996-01-27 10.86 3510 Minor none 1996-03-20 11.96 5090 Minor none 1996-04-02 11.01 3690 Minor none 1996-08-01 11.78 4800 Minor none 1996-08-03 11.62 4540 Minor none 1996-08-13 11.92 5030 Minor none 1996-09-07 15.06 11700 Major none 1996-10-19 12.37 5820 Minor none 1996-11-09 12.53 6110 Minor none 1996-12-14 10.91 3570 Minor none 1997-03-04 10.36 2980 Minor none 1997-11-08 12.16 5440 Minor none 1998-01-09 10.57 3190 Minor none 1998-01-29 12.08 5300 Minor none 1998-02-06 13.09 7170 Moderate none 1998-02-24 11.47 4320 Minor none 1998-03-19 10.49 3110 Minor none 1998-03-21 14.41 10100 Moderate none 2001-03-22 10.58 3200 Minor none 2003-01-02 11.41 -9999 Minor none 2003-02-23 10.5 -9999 Minor none 2003-03-21 11.51 -9999 Minor none 2003-06-22 12.82 -9999 Minor none 2003-09-20 10.36 -9999 Minor none 2004-09-09 13.21 6980 Moderate none 2005-03-29 12.02 5030 Minor none 2005-11-30 11.7 4540 Minor none 2006-06-28 12.8 6330 Minor none 2007-04-16 10.59 3110 Minor none 2008-04-21 12.5 5800 Minor none 2008-04-27 10.66 3170 Minor none 2008-05-12 12.91 6530 Minor none 2009-05-05 10.07 2660 Minor none 2009-12-10 10.42 2950 Minor none 2010-01-26 12.15 5230 Minor none 2010-03-14 12.91 6530 Minor none 2010-03-29 10.63 3140 Minor none 2010-12-02 10.13 2710 Minor none 2011-03-11 10.23 2790 Minor none 2011-04-17 12.4 5640 Minor none 2011-04-28 10.38 2920 Minor none 2011-05-18 12.32 5500 Minor none 2011-12-08 10.23 3070 Minor none

MARFC Codes
Code Description
(!!!) Datum changed during this year.
(1) Backwater Effect.
(2) 15.77 ft also occurred on 11/25/1950 but only counted as one flood.
(3) Estimated from currrent USGS rating table.
(4) Estimated height from the USGS.
(5) Gage height at a different site and/or datum
(6) Discharge affected by Regulation or Diversion
(7) Due to changes, prior floods were based on present flood stage. Therefore, flood data could possibly be incomplete.
(8) Gage is a staff gage and not the offical USGS gage. Therefore, some floods may be missing from our study.
(9) Discharge effected by snow-melt, ice jam or debris jam break up
(A) Discharge affected to unknown degree by regulation or diversion.
(B) Month or day of occurrence is unknown or not exact.
(C) All or part of the record affected by urbanization, mining, agricultural changes, channelization, or other factors.
(D) Crest height adjusted to current datum.
(E) Estimated discharge.
(F) Only annual maximum peak available for this year.
(O) This flood occurred at a previous flood stage that is lower than the current flood stage. This is only a historical flood.
** Crest information looks reasonable despite potential problems. This data was used in our study.
*** Crest information looks unreliable and incomplete and was not used in our flood frequency study.
**** Gauge was discontinued in 2004. 2004 and later was not used in our study.
none No code

Updated: 08:58 AM Jun 28, 2012