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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 13127000 BIG LOST RIVER BL MACKAY RES NR MACKAY ID


Custer County, Idaho
Hydrologic Unit Code 17040218
Latitude  43°56'21", Longitude 113°38'54" NAD83
Drainage area 801  square miles
Gage datum 5,950.58 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 1903-10-01 -> 2025-09-30)

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
1 111 120 132 151 201 863 833 512 276 207 118 100
2 112 120 133 148 207 870 807 503 269 205 114 100
3 112 121 134 148 214 872 789 495 269 201 113 100
4 112 121 136 150 229 867 779 488 267 195 113 101
5 112 121 136 148 242 878 764 481 261 196 112 102
6 112 122 137 150 257 898 747 474 259 199 107 103
7 113 121 137 149 273 908 731 468 255 194 106 104
8 114 121 138 148 293 929 718 461 250 191 109 104
9 115 121 138 149 314 961 712 453 248 189 110 104
10 115 121 139 148 332 969 703 443 246 188 109 105
11 115 122 139 149 350 956 695 433 241 189 106 107
12 116 122 140 151 364 937 680 423 237 191 104 108
13 116 122 142 152 378 928 666 413 236 191 106 107
14 117 123 142 153 396 929 653 407 233 192 105 108
15 117 123 142 154 405 929 633 401 229 187 109 108
16 117 123 144 155 422 935 613 395 226 167 107 109
17 117 125 145 155 442 926 600 390 221 154 106 108
18 118 126 146 154 464 926 594 383 219 150 105 109
19 118 125 148 156 498 934 587 375 218 146 103 109
20 119 125 149 159 521 934 583 369 216 144 99 109
21 119 130 149 162 552 935 581 362 213 142 98 109
22 119 127 150 164 583 942 581 355 212 140 98 108
23 119 128 151 167 624 926 577 350 211 135 98 108
24 119 128 151 168 653 910 569 341 212 134 97 108
25 119 128 152 173 680 905 566 331 211 132 97 108
26 119 129 151 178 707 910 561 322 211 131 97 109
27 119 132 151 183 731 906 555 314 211 134 98 109
28 119 132 152 187 761 898 549 305 211 133 98 109
29 120 134 152 188 802 878 544 299 212 132 99 110
30 120   152 191 831 858 539 293 210 131 100 111
31 120   152   848   524 285   126   111