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 1,230.36 feet above sea level
NGVD29
|
Water
Year |
Date |
Gage
Height
(feet) |
Stream-
flow
(cfs) |
| 1889 |
unknown 1889 |
|
218,0007 |
| 1935 |
unknown 1935 |
46.00 |
380,0007 |
| 1952 |
unknown 1952 |
|
258,0007 |
| 1968 |
May 5, 1968 |
10.38 |
18,100 |
| 1969 |
Jun. 24, 1969 |
5.77 |
3,080 |
| 1970 |
Oct. 5, 1969 |
18.53 |
55,700 |
| 1971 |
Aug. 12, 1971 |
12.94 |
31,600 |
| 1972 |
Oct. 20, 1971 |
11.40 |
23,200 |
| 1973 |
Jul. 31, 1973 |
8.94 |
12,000 |
| 1974 |
Oct. 13, 1973 |
26.30 |
151,000 |
| 1975 |
May 24, 1975 |
6.42 |
5,040 |
| 1976 |
Sep. 2, 1976 |
12.48 |
26,900 |
| 1977 |
Apr. 16, 1977 |
16.64 |
52,000 |
| 1978 |
Aug. 3, 1978 |
21.35 |
92,500 |
| 1979 |
Jun. 1, 1979 |
12.20 |
25,500 |
| 1980 |
Sep. 8, 1980 |
37.00 |
260,000 |
| 1981 |
Jun. 17, 1981 |
12.71 |
29,800 |
|
|
Water
Year |
Date |
Gage
Height
(feet) |
Stream-
flow
(cfs) |
| 1982 |
Oct. 13, 1981 |
25.06 |
114,000 |
| 1983 |
May 21, 1983 |
2.15 |
340 |
| 1984 |
May 20, 1984 |
1.94 |
367 |
| 1985 |
Dec. 31, 1984 |
25.22 |
115,000 |
| 1986 |
Oct. 19, 1985 |
16.18 |
48,300 |
| 1987 |
Jun. 4, 1987 |
12.35 |
24,900 |
| 1988 |
Jul. 12, 1988 |
18.40 |
61,600 |
| 1989 |
May 17, 1989 |
4.34 |
1,800 |
| 1990 |
May 3, 1990 |
17.49 |
55,200 |
| 1991 |
Sep. 17, 1991 |
10.13 |
16,400 |
| 1992 |
Feb. 25, 1992 |
8.87 |
11,800 |
| 1993 |
Dec. 15, 1992 |
2.16 |
496 |
| 1994 |
May 15, 1994 |
7.27 |
6,780 |
| 1995 |
Sep. 22, 1995 |
8.75 |
11,400 |
| 1998 |
Aug. 24, 1998 |
16.38 |
49,300 |
| 1999 |
Jun. 22, 1999 |
2.67 |
743 |
| 2000 |
Sep. 25, 2000 |
4.07 |
1,820 |
| 2001 |
Nov. 4, 2000 |
32.00 |
170,000 |
|
|
