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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 23 20 109 50 19 2.4 6.7 128 24
2 39 11 12 21 11 133 28 17 1.7 1.8 48 21
3 63 44 13 25 91 97 53 17 2 1.9 39 19
4 29 37 9.9 18 313 90 40 13 18 2.4 25 17
5 21 34 11 12 32 65 27 11 3.3 1.1 18 17
6 17 21 17 10 22 51 29 9.9 4.6 1 14 16
7 15 17 17 10 20 42 33 9.4 5.9 0.97 12 23
8 13 16 15 12 139 36 19 8.1 145 1 15 33
9 12 17 22 11 66 65 18 6.7 69 3.6 15 15
10 9.2 14 25 9.4 33 94 13 5.7 23 2.7 11 11
11 9.5 15 20 8.9 99 31 11 4.5 15 1.8 8.8 8.4
12 9.2 20 90 17 44 21 9 3.5 11 1.5 7.6 7.7
13 127 16 29 13 36 15 7.6 2.8 3.1 148 6.7 15
14 11 15 32 8.6 22 17 17 2.5 1.8 107 5.9 13
15 12 12 18 5.9 37 16 14 3.2 1.5 7.8 17 9.2
16 33 10 15 4.5 66 12 29 50 1.5 20 15 8.3
17 12 9.7 12 4.6 91 13 5.2 56 2.5 14 450 8.2
18 30 23 11 29 57 10 4.7 21 17 9.3 74 7.4
19 21 12 10 24 212 9.7 5.6 11 8 7.7 44 11
20 13 24 58 16 78 13 39 39 4.6 9.8 45 7.1
21 9.8 18 37 16 44 13 128 36 4.2 5.3 42 5.8
22 69 12 33 18 36 24 48 17 17 7.6 346 5.4
23 29 11 16 13 30 16 32 11 6.3 72 152 4.8
24 19 12 12 12 311 13 47 6.7 2.5 17 59 6
25 59 9.4 11 12 161 11 42 4.1 1.7 17 46 4.6
26 11 9.5 13 8.5 196 21 42 23 3.1 20 52 3.9
27 8 10 52 7.8 199 32 44 57 2.1 16 35 87
28 10 8.5 49 6.7 124 26 27 14 1.5 5 30 26
29 21 4.3 23 5.9 107 32 42 4.5 20 3 30 16
30 18   45 10 81 94 29 3 2.6 578 27 13
31 13   52   99   22 3.2   697   14