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USGS Daily Statistics for Colorado

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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 09015000 COLORADO RIVER BL SHADOW MOUNTAIN RESERVOIR, CO.


Grand County, Colorado
Hydrologic Unit Code 14010001
Latitude  40°12'18.70", Longitude 105°50'15.22" NAD83
Drainage area 190  square miles
Gage datum 8,332 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 1947-10-01 -> 2021-09-30)

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 30 24 25 26 111 794 494 87 48 48 54 35
2 28 24 25 35 141 773 512 87 47 49 36 34
3 27 24 26 35 162 851 396 80 45 42 38 34
4 26 24 26 32 154 910 460 75 44 34 39 33
5 25 24 26 31 164 923 371 83 44 34 39 33
6 25 24 27 32 193 936 348 80 43 47 39 33
7 25 24 27 32 232 1,020 344 75 43 42 38 33
8 25 24 27 32 275 1,090 336 74 43 43 37 33
9 25 24 28 33 260 1,010 321 82 43 42 37 33
10 25 24 28 36 256 984 243 86 43 40 38 33
11 25 24 28 35 212 1,010 232 78 42 41 42 32
12 25 24 29 40 227 999 209 69 42 43 42 32
13 25 24 26 34 257 1,040 217 69 44 38 34 33
14 25 24 25 32 262 1,020 181 66 42 43 35 33
15 25 24 25 35 278 895 178 59 100 33 48 33
16 24 24 25 44 263 860 153 51 62 38 38 33
17 25 24 25 37 291 798 138 49 42 40 40 33
18 24 25 25 36 365 796 157 47 41 51 39 33
19 24 25 25 36 384 884 132 54 41 63 37 32
20 24 25 25 43 416 852 123 46 45 65 35 32
21 24 25 25 54 476 863 104 53 47 64 37 32
22 24 25 24 66 536 751 76 55 47 59 41 32
23 24 25 25 62 565 623 105 51 47 59 56 32
24 24 25 25 64 526 549 93 54 46 57 63 32
25 24 25 24 66 541 531 93 50 43 57 66 32
26 24 25 24 77 565 498 94 47 38 58 67 32
27 24 25 24 89 528 467 88 48 40 58 64 32
28 24 25 24 110 601 481 85 46 42 57 56 33
29 24 24 24 104 670 544 81 49 42 58 47 32
30 24   24 102 694 544 81 49 42 57 35 32
31 24   24   747   85 46   43   31