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USGS Surface-Water 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 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 -> 2022-09-30)

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 27 120 794 472 85 48 48 54 35
2 28 24 25 37 138 773 489 85 46 48 37 35
3 27 24 26 37 156 851 379 78 45 42 39 34
4 26 24 26 34 151 930 440 76 44 34 39 34
5 25 24 26 33 164 946 356 81 44 34 39 34
6 24 24 27 32 193 958 334 78 43 47 39 33
7 24 24 27 31 232 1,040 330 74 43 42 38 33
8 24 24 27 31 275 1,100 321 72 43 42 38 33
9 24 24 27 33 260 1,020 306 80 43 42 37 33
10 25 24 28 35 256 990 233 84 43 40 38 33
11 25 24 28 36 212 1,010 223 77 42 41 42 33
12 24 24 28 45 227 985 200 68 42 43 42 33
13 24 24 26 35 257 1,020 208 68 43 38 35 33
14 24 24 25 33 262 1,000 174 65 41 46 36 33
15 24 24 25 36 278 879 172 58 97 34 48 33
16 24 24 25 45 263 841 148 51 61 38 39 33
17 24 24 25 41 291 778 133 49 42 39 40 33
18 24 25 25 37 365 769 151 47 41 51 39 33
19 24 25 25 40 384 848 128 53 41 62 37 33
20 24 25 24 46 416 818 119 46 44 63 36 33
21 24 25 24 62 476 824 101 53 46 62 37 33
22 24 25 24 83 536 715 75 54 47 58 41 33
23 24 25 24 76 565 595 102 51 46 57 56 33
24 24 25 24 72 526 530 90 54 46 56 62 33
25 24 25 24 75 541 508 91 50 42 56 65 33
26 24 25 24 80 565 477 92 48 38 57 66 33
27 24 25 24 93 528 446 86 48 40 57 63 33
28 24 25 24 119 601 458 83 46 42 56 56 33
29 24 24 24 110 670 519 80 49 42 57 47 33
30 24   24 110 694 519 80 49 42 56 36 33
31 24   24   747   83 47   42   32