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USGS Daily Statistics for the Nation

The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 08158827 Onion Ck at Twin Creeks Rd nr Manchaca, TX


Travis County, Texas
Hydrologic Unit Code 12090205
Latitude  30°07'34", Longitude  97°49'15" NAD27
Drainage area 181  square miles
Contributing drainage area 181  square miles
Gage datum 584.16 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 2002-10-01 -> 2024-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 10 12 7.6 22 19 105 48 18 2.4 6.7 128 24
2 39 11 12 20 10 127 27 16 1.7 1.8 48 21
3 63 44 13 24 87 92 51 16 2 1.9 39 19
4 29 37 9.9 18 298 86 38 13 18 2.4 25 17
5 21 34 11 12 31 62 25 11 3.3 1.1 18 17
6 17 21 17 9.9 21 49 28 9.5 4.6 1 14 16
7 15 17 17 9.9 19 40 31 9.4 5.9 0.97 12 23
8 13 16 14 12 132 34 18 8.1 145 1 15 33
9 12 17 21 11 63 62 18 6.7 69 3.6 15 15
10 9.2 14 24 9.5 32 90 12 5.7 23 2.7 11 11
11 9.5 15 19 8.8 94 30 10 4.5 15 1.8 8.8 8.4
12 9.2 20 86 16 42 20 8.6 3.5 11 1.5 7.6 7.7
13 127 16 28 12 35 15 7.3 2.8 3.1 148 6.7 15
14 11 15 31 8.3 21 16 16 2.5 1.8 107 5.9 13
15 12 12 18 5.7 36 15 14 3.2 1.5 7.8 17 9.2
16 33 10 14 4.4 63 11 27 50 1.5 20 15 8.3
17 12 9.7 12 4.5 87 13 5 56 2.5 14 450 8.2
18 30 23 11 27 55 9.6 4.9 21 17 9.3 74 7.4
19 21 12 9.9 23 202 9.3 5.7 11 8 7.7 44 11
20 13 24 55 15 74 14 37 39 4.6 9.8 45 7.1
21 9.8 18 35 15 42 13 125 36 4.2 5.3 42 5.8
22 69 12 31 17 35 23 48 17 17 7.6 346 5.4
23 29 11 15 12 29 15 38 11 6.3 72 152 4.8
24 19 12 11 12 296 12 49 6.7 2.5 17 59 6
25 59 9.4 11 11 153 11 41 4.1 1.7 17 46 4.6
26 11 9.5 13 8.1 186 20 41 23 3.1 20 52 3.9
27 8 10 50 7.5 190 30 42 57 2.1 16 35 87
28 10 8.5 47 6.6 118 25 26 14 1.5 5 30 26
29 21 4.3 22 6 103 31 40 4.5 20 3 30 16
30 18   42 9.7 77 90 28 3 2.6 578 27 13
31 13   50   100   21 3.2   697   14