Swatara Creek at Harper Tavern, Lebanon County PA (HTVP1)
Gage Location: Lebanon County, Pennsylvania	Site Location: Lebanon County, Pennsylvania
Latitude: 40.403	Longitude: -76.578	Elevation: 356.68 ft. MSL	Drainage Area: 337 Sq. Mi.
Minor Stage: 9 ft.	Moderate Stage: 12 ft.	Major Stage: 15 ft.
First Flood: 1889-06-01	Last Flood: 2013-01-31 Crest: 9.01 ft.	Datum change: 1919-01-01	Number of Floods: 153

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Date of Flood Crest(ft) Streamflow(cfs) Category Code 1889-06-01 25.6 88000 Major *** 1919-07-21 9.4 6750 Minor none 1920-03-08 9.6 7030 Minor none 1920-03-13 11.32 10000 Minor none 1921-05-05 10.16 7640 Minor none 1922-03-08 10.4 7880 Minor none 1924-01-17 12 11400 Moderate none 1924-10-01 13.2 14200 Moderate none 1925-02-12 14.4 17200 Moderate none 1925-11-13 9.4 6750 Minor none 1926-01-19 9.4 6750 Minor none 1926-02-26 11.1 9600 Minor none 1926-07-30 12.4 12500 Moderate none 1926-11-16 14.6 17800 Moderate none 1926-11-19 10.2 7960 Minor none 1927-10-13 9.1 6370 Minor none 1927-10-19 9.2 6490 Minor none 1928-02-15 10.6 8650 Minor none 1928-06-30 11 9400 Minor none 1929-02-27 10.4 7880 Minor none 1929-03-06 10.5 8000 Minor none 1929-10-03 11.2 9800 Minor none 1930-04-07 9.3 6620 Minor none 1932-03-28 9.5 7020 Minor none 1932-11-01 9.36 6650 Minor none 1933-04-17 10.42 8260 Minor none 1933-08-24 17.53 25300 Major none 1934-12-02 11.54 10400 Minor none 1936-03-12 13.75 15800 Moderate none 1936-03-18 9.92 7710 Minor none 1936-04-06 10.47 8620 Minor none 1937-10-23 11.8 11000 Minor none 1938-12-06 10.3 8350 Minor none 1940-03-15 10.42 9660 Minor none 1940-03-31 10.35 9660 Minor none 1940-04-09 9.59 8440 Minor none 1940-04-20 9.22 7860 Minor none 1940-09-01 11.51 11500 Minor none 1942-05-23 12.88 14000 Moderate none 1942-08-17 11.04 10300 Minor none 1942-09-28 9.91 8440 Minor none 1942-12-30 11.07 10300 Minor none 1943-11-09 13.25 14600 Moderate none 1945-07-19 11.35 10400 Minor none 1946-05-28 9.47 7620 Minor none 1947-05-22 11.72 11000 Minor none 1947-05-26 9.98 8310 Minor none 1947-07-08 10.57 9190 Minor none 1948-12-31 11.21 10400 Minor none 1949-01-06 10.13 8810 Minor none 1950-11-26 13.09 14000 Moderate none 1950-12-05 13.34 14400 Moderate none 1951-02-07 11.16 10500 Minor none 1951-12-05 9.16 7590 Minor none 1952-03-12 11.72 11500 Minor none 1952-04-29 9.44 8150 Minor none 1952-05-12 10.78 10100 Minor none 1952-09-01 11.39 11000 Minor none 1952-11-22 11.79 11700 Minor none 1953-01-24 9.76 8690 Minor none 1955-08-19 12.35 12700 Moderate none 1957-04-06 10.3 9390 Minor none 1957-12-21 10.47 9680 Minor none 1958-02-28 9.4 8150 Minor none 1959-01-22 9.67 8550 Minor none 1959-09-03 9.47 8280 Minor none 1960-09-20 10.71 9980 Minor none 1961-02-26 11.1 10600 Minor none 1964-01-26 10.27 9350 Minor none 1965-02-08 11.56 11300 Minor none 1966-02-14 10.06 8140 Minor none 1968-05-31 9.08 7540 Minor none 1970-04-03 11.97 11600 Minor none 1971-02-14 12.76 13100 Moderate none 1972-06-23 23.72 66700 Major none 1973-09-15 9.85 8360 Minor none 1973-12-21 10.98 10000 Minor none 1975-03-20 9.74 8210 Minor none 1975-09-27 17.24 24700 Major none 1976-01-27 12.57 12800 Moderate none 1976-10-10 12.89 13400 Moderate none 1977-03-05 10.85 9820 Minor none 1977-03-23 9.16 7420 Minor none 1978-01-09 9.9 8430 Minor none 1978-01-26 12.47 12600 Moderate none 1978-03-27 11.38 10600 Minor none 1979-01-21 10.15 8780 Minor none 1979-01-25 15.77 20500 Major none 1979-02-24 10.53 9340 Minor none 1979-02-26 11.42 10700 Minor none 1979-03-06 9.36 7680 Minor (1) (6) 1979-09-06 10.18 8820 Minor none 1980-03-22 9.55 7550 Minor none 1981-02-11 12.6 11000 Moderate none 1981-02-24 9.8 6440 Minor none 1982-02-04 9.28 -9999 Minor none 1983-04-16 12.82 13000 Moderate none 1983-12-14 11.19 9940 Minor none 1984-02-15 9.2 7160 Minor none 1984-05-30 10.66 9160 Minor none 1985-02-03 11.12 9840 Minor none 1986-03-15 10.75 9390 Minor (A) 1987-09-14 12.03 11600 Moderate none 1988-05-20 11.93 11400 Minor none 1989-05-06 9.79 7790 Minor none 1989-05-17 11.68 10800 Minor none 1990-01-30 9.51 7420 Minor none 1990-12-04 9.31 7160 Minor none 1992-03-27 10.18 6850 Minor none 1993-04-02 9.36 7230 Minor none 1993-04-11 9.58 7510 Minor none 1993-11-29 15.09 15800 Major none 1993-12-05 12.11 10200 Moderate none 1994-03-27 10.81 8280 Minor none 1994-06-07 9.61 6690 Minor none 1995-01-21 10.17 8800 Minor none 1996-01-20 15.67 19800 Major (1) 1996-01-28 12.49 12600 Moderate none 1996-10-20 11.83 11400 Minor none 1996-11-09 10.12 8730 Minor (E) (4) 1996-12-02 9.76 8210 Minor none 1996-12-14 10.18 8820 Minor none 1999-01-24 9.34 7630 Minor none 2000-03-22 11.23 10400 Minor none 2000-12-17 10.94 9950 Minor none 2003-03-21 10.39 9120 Minor none 2003-06-03 10.28 9000 Minor none 2003-08-11 9.4 7700 Minor none 2003-12-12 10.82 9800 Minor none 2004-09-19 17.36 25000 Major none 2004-09-29 10.09 8690 Minor none 2005-01-14 10.29 8980 Minor none 2005-03-29 11.02 10100 Minor none 2005-04-03 11.58 -9999 Minor none 2006-06-28 18.28 28300 Major none 2006-10-29 10.58 9410 Minor none 2006-11-17 10.55 9360 Minor none 2007-03-02 11.67 11200 Minor none 2008-02-02 9.32 7600 Minor none 2008-03-06 13.88 15300 Moderate none 2008-12-12 10.26 8930 Minor none 2010-10-01 11.75 11300 minor none 2011-03-07 10.66 9530 Minor none 2011-03-11 14.32 16300 Moderate none 2011-04-17 11.78 11300 Minor none 2011-04-28 9.26 7520 Minor none 2011-06-12 10.13 8740 Minor none 2011-09-08 24.46 -9999 Major none 2011-09-28 11.11 10200 Minor none 2011-11-23 10.22 8870 Minor none 2012-05-16 9.13 7340 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