Frankstown Branch Juniata River at Williamsburg, Blair County PA (WIBP1)
Gage Location: Blair County, Pennsylvania	Site Location: Blair County, Pennsylvania
Latitude: 40.463	Longitude: -78.2	Elevation: 831.78 ft. MSL	Drainage Area: 291 Sq. Mi.
Minor Stage: 12 ft.	Moderate Stage: 13 ft.	Major Stage: 15 ft.
First Flood: 1889-06-01	Last Flood: 2011-09-10 Crest: 12.16 ft.	Datum change: 1928-08-14	Number of Floods: 44

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Date of Flood Crest(ft) Streamflow(cfs) Category Code 1889-06-01 19.1 35500 Major *** 1924-05-12 12.8 11000 Minor *** 1925-02-12 12.4 10200 Minor *** 1929-10-23 13.9 13000 Moderate none 1936-03-18 18.58 30000 Major none 1937-04-26 13.9 13400 Moderate none 1937-04-28 12.43 11400 Minor none 1940-03-31 12.94 12900 Minor none 1952-03-11 12.82 9250 Minor none 1954-03-01 13.98 11200 Moderate none 1954-10-16 12.27 8000 Minor none 1956-08-08 13.23 10500 Moderate none 1960-05-09 13.36 9920 Moderate none 1961-02-26 14.12 11400 Moderate none 1963-03-05 12.25 -9999 Minor (1) 1964-03-10 12.04 7540 Minor none 1966-02-14 13.3 9800 Moderate none 1967-03-06 12.92 9050 Minor none 1970-04-02 13.54 8550 Moderate none 1970-11-13 14.5 10000 Moderate none 1972-06-23 18.39 16400 Major none 1977-04-03 12.11 6770 Minor none 1979-03-05 13.05 7900 Moderate none 1984-02-15 15.38 11300 Major none 1986-03-03 12.09 6960 Minor none 1987-04-05 13.76 9040 Moderate none 1993-04-16 14.08 9470 Moderate none 1993-11-28 16.03 12300 Major none 1994-03-25 13.59 8820 Moderate none 1996-01-19 19.35 17800 Major none 1996-03-20 12.05 6920 Minor none 1996-07-20 13.28 8420 Moderate none 1996-09-07 12.82 7840 Minor none 1997-11-08 17.9 15200 Major none 2003-01-02 13.49 8690 Moderate none 2003-11-20 12.85 7900 Minor none 2004-09-09 16.91 13600 Major none 2004-09-18 19.46 18000 Major none 2010-01-25 12.25 7160 Minor none 2010-03-14 13.56 8780 Moderate none 2010-12-01 15.27 11600 Major none 2011-03-11 13.77 9470 Moderate none 2011-09-07 14.03 9810 Moderate none 2011-09-10 12.16 7360 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