Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

* We've detected you're using a mobile device. Find our Next Generation Station Page here.
Click to hideNews Bulletins

Peak Streamflow for the Nation

USGS 08150700 Llano Rv nr Mason, TX

Mason County, Texas
Hydrologic Unit Code 12090204
Latitude  30°39'38", Longitude  99°06'32" NAD27
Drainage area 3,247  square miles
Contributing drainage area 3,242  square miles
Gage datum 1,225.60 feet above NAVD88
Output formats
Table
Graph
Tab-separated file
peakfq (watstore) format
Reselect output format
Water
Year		 Date Gage
Height
(feet)		 Stream-
flow
(cfs)
1889 1889   218,0007,Bm
1935 1935-06-14 46.00 380,0007
1952 1952   258,0007,Bm
1968 1968-05-05 10.38 18,100
1969 1969-06-24 5.77 3,080
1970 1969-10-05 18.53 55,700
1971 1971-08-12 12.94 31,600
1972 1971-10-20 11.40 23,200
1973 1973-07-31 8.94 12,000
1974 1973-10-13 26.30 151,000
1975 1975-05-24 6.42 5,040
1976 1976-09-02 12.48 26,900
1977 1977-04-16 16.64 52,000
1978 1978-08-03 21.35 92,500
1979 1979-06-01 12.20 25,500
1980 1980-09-08 37.00 260,000
1981 1981-06-17 12.71 29,800
1982 1981-10-13 25.06 114,000
1983 1983-05-21 2.15 471
1984 1984-05-20 1.94 367
1985 1984-12-31 25.22 115,000
1986 1985-10-19 16.18 48,300
1987 1987-06-04 12.35 24,900
1988 1988-07-12 18.40 61,600
1989 1989-05-17 4.34 1,800
1990 1990-05-03 17.49 55,200
1991 1991-09-17 10.13 16,400
1992 1992-02-25 8.87 11,800
1993 1992-12-15 2.16 496
1994 1994-05-15 7.27 6,780
1995 1995-09-22 8.75 11,400
1998 1998-08-24 16.38 49,300
1999 1999-06-22 2.67 743
2000 2000-09-25 4.07 1,820
2001 2000-11-04 32.00 170,000
2002 2001-11-15 17.74 60,100
2003 2003-09-19 4.40 2,360
2004 2004-06-09 8.21 10,900
2005 2004-11-17 21.50 88,600
2006 2006-05-08 3.43 1,390
2007 2007-08-17 11.82 25,900
2008 2008-04-27 4.83 3,050
2009 2009-04-28 6.31 5,180
2010 2010-05-26 9.71 13,800
2011 2011-05-12 0.98 165
2012 2012-05-11 7.27 6,550
2013 2013-09-21 7.82 7,750
2014 2014-05-26 5.77 3,630
2015 2015-05-21 11.24 19,400
2016 2016-05-29 8.15 8,530
2017 2017-06-27 4.26 1,550
2018 2018-09-22 12.02 22,700
2019 2018-10-16 34.21 201,000
2020 2020-03-21 6.30 4,750
2021 2021-05-30 2.772 666
2022 2021-10-01 10.99 3,610
2023 2023-05-20 10.97 3,490
?
  Peak Gage-Height Qualification Codes.
?
  Peak Streamflow Qualification Codes.