Wyoming State Water Plan
Wyoming State Water Plan
Wyoming Water Development Office
6920 Yellowtail Rd
Cheyenne, WY 82002
Phone: 307-777-7626
Wyoming Water Development Office
6920 Yellowtail Rd
Cheyenne, WY 82002
Phone: 307-777-7626
SUBJECT: |
Appendix M Available Surface Water Determination |
PREPARED BY: | HKM Engineering Inc. |
DATE: | February 2002 |
INTRODUCTION
Spreadsheet water accounting models have been developed for the following six primary subbasins in the Powder/Tongue River Basin planning area to represent streamflows under current levels of development.
The purpose of the current task is to analyze the results of the spreadsheet model runs to determine where water shortages currently exist and to determine the location, quantity, and timing of available flows for future development.
WATER SHORT AREAS
HKM reviewed the results of the water availability modeling runs to make a determination of where water shortages occur under existing conditions. The results of the modeling were further reviewed by identifying those ditches that have experienced relatively low diversions historically in comparison to other ditches. As a further crosscheck, the initial determinations of water short areas were reviewed with the SEO Division 2 Superintendent for reasonableness. It is recognized that almost every area of the planning area can be considered water short during severe dry years such as were experienced during the summer of 2001. The purpose of this investigation is to identify those areas that experience relatively high shortages in comparison to other areas in the Basin. The areas listed in Table 1 were identified as being water short in a typical year.
Table 1 Water Short Areas During Normal Hydrologic Conditions | |
River Basin | Stream |
Little Bighorn River | Twin Cr. East Pass Cr. |
Tongue River | Columbus Cr. Smith Cr. Rapid Cr. Little Goose Cr. Soldier Cr. Wolf Cr. Little Tongue R. |
Clear Creek | Little Piney Cr. Rock Cr. Johnson Cr. French Cr. Clear Cr. |
Crazy Woman Creek | N. Fk. Crazy Woman Cr. Muddy Cr. (trib. of N.Fk. Crazy Woman Cr.) Middle Fk. Crazy Woman Cr. |
Powder River | N. Fk. Powder R. Buffalo Cr. Middle Fk. Powder |
Little Powder River | Little Powder River |
AVAILABLE FLOW
Each basin model is divided into a number of reaches, each composed of several nodes, or water balance points. Reaches are typically defined by gages or confluences, and represent tributary basins or subsections of the mainstem. A Reach Outflow worksheet is provided in each model summarizing the monthly flow at the downstream end of each reach. The information provided in these summaries is the basis for this analysis.
While simulated flow at the reach terminus indicates the estimated amount of water physically present, it does not fully reflect availability. Downstream demands relying on the water physically available at any given location must first be accounted for. These downstream demands fall into three general categories:
To determine how much of the physical supply is actually available in excess of existing demands, "available flow" at each reach terminus is defined as the minimum of the physically available flow at that point, and the "available flow" at all downstream reaches. Thus available flow must be defined first at the most downstream point, with upstream availability calculated in stream order. These calculations are made on a monthly basis, and annual water availability is computed as the sum of monthly values. Note that calculating annual availability in this way yields a different result than applying the same logic to annual flows for each reach. The summation of monthly values is more accurate, reflecting constraints of downstream use on a monthly basis.
Instream Flow Constraints
Instream flow rights exert a demand on the river but do not affect physical supply, because the water is not removed from the stream. Sufficient flow must be bypassed through upstream reaches to satisfy downstream instream flow requirements. The available flow for reaches located upstream from permitted instream flows are determined as the minimum of physical flow at that point, and available flow in excess of existing diversion demands less the instream flow requirement at the downstream reach.
The six permitted instream flow rights in the planning area are described in the Environmental Water Use memorandum (HKM, 2002). With only one exception, all of the instream flow rights are located above the most upstream reach explicitly simulated in the model. The available flow for future development reported herein, therefore, is downstream from most of these instream flow constraints. The exception is a 9.86-mile long reach of the Middle Fork Powder River with a 1987 priority instream flow requirement of 12 to 25 cfs. The available flow in Reach 2 of the Powder River sub-basin was calculated taking this instream flow demand into consideration.
The reach by reach results of the monthly available flow determination, accounting for the instream flow constraints, are provided in Tables 2 through 19 for each of the six subbasins and for each of the three hydrologic conditions (wet, normal, and dry years). The total annual available flow is summarized in Table 20 for each subbasin and hydrologic condition.
Table 20 Total Annual Available Flow | |||
Subbasin | Hydrologic Condition | ||
Wet Years | Normal Years | Dry Years | |
Little Bighorn River | 152,000 | 113,000 | 81,000 |
Tongue River | 473,000 | 326,000 | 218,000 |
Clear Creek | 213,000 | 124,000 | 80,000 |
Crazy Woman Creek | 69,000 | 32,000 | 16,000 |
Powder River | 547,000 | 324,000 | 194,000 |
Little Powder River | 48,000 | 12,000 | 3,000 |
The yield potential of each of these basins is limited by the dry year conditions. Further, the timing of these available flows does not necessarily match the timing of the demand for this water. For example of the 218,000 acre feet of available flow from the Tongue River during a typical dry year, 65 percent of this occurs during the spring runoff months of March through June. Reservoir storage would be required to store this excess flow to satisfy demands throughout the year. The available flow presented in Table 20 does not include the constraints of the Yellowstone River Compact. This will be discussed in the next section.
Compact Constraints
A determination of the amount of water available to Wyoming for future development is not complete without an evaluation of the constraints imposed by interstate compacts. The Yellowstone River Compact of 1950 governs the allocation of the waters in the Powder River and Tongue River between the States of Montana and Wyoming.
The following is a brief summary of the rules for dividing the waters according to the Yellowstone River
Compact (SEO, 1982):
The unappropriated or unused total divertible flow of each tributary after needs for supplemental
supply for existing rights are met, is allocated to Wyoming and Montana on a percentage basis
Nothing contained in the Compact is to be construed to adversely affect any rights to the use of the
waters of the Yellowstone River by or for Indians, Indian tribes, and their reservations.
Additional discussion of the Compact is provided in the Legal and Institutional Constraints memorandum
(Lord Consulting, 2002).
The methodology used in the current study to evaluate water availability under the Yellowstone River Compact was coordinated through the Wyoming State Engineers Office and relies heavily on previous work performed by others on behalf of each of the two States (Tavelli, October 2001). A more detailed, "from the ground up" evaluation is beyond the scope of the current planning effort. The methodology employed provides estimates of Wyoming's allocation under each of the three hydrologic conditions (wet, normal, and dry years).
Table 2 Available Flow for Little Bighorn Basin (Acre-Feet) - Wet Year Hydrologic Conditions | ||||||||||||||
Reach | Reach Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
1 | East Pass Cr below USGS gage 06289800 | 549 | 484 | 684 | 1,035 | 3,727 | 4,598 | 1,411 | 517 | 721 | 710 | 600 | 210 | 15,555 |
2 | East Pass Cr below USGS gage 06289820 | 568 | 496 | 690 | 1,035 | 3,741 | 4,636 | 1,458 | 573 | 788 | 760 | 638 | 549 | 15,931 |
3 | Elkhorn Creek below USGS gage 06288975 | 89 | 81 | 92 | 136 | 711 | 1,115 | 315 | 147 | 150 | 118 | 102 | 95 | 3,153 |
4 | 'Red Canyon Creek below USGS gage 06289100 | 46 | 37 | 66 | 346 | 1,001 | 421 | 105 | 48 | 44 | 60 | 52 | 42 | 2,268 |
Table 3 Available Flow for Little Bighorn Basin (Acre-Feet) - Normal Year Hydrologic Conditions | ||||||||||||||
Reach | Reach Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
1 | East Pass Cr below USGS gage 06289800 | 528 | 542 | 635 | 982 | 2,882 | 2,855 | 883 | 494 | 512 | 596 | 562 | 544 | 12,016 |
2 | East Pass Cr below USGS gage 06289820 | 549 | 556 | 643 | 988 | 2,906 | 2,902 | 937 | 556 | 589 | 654 | 605 | 575 | 12,461 |
3 | Elkhorn Creek below USGS gage 06288975 | 86 | 75 | 88 | 137 | 464 | 592 | 174 | 124 | 114 | 116 | 101 | 92 | 2,164 |
4 | 'Red Canyon Creek below USGS gage 06289100 | 29 | 24 | 43 | 213 | 544 | 238 | 61 | 29 | 28 | 40 | 35 | 28 | 1,313 |
Table 4 Available Flow for Little Bighorn Basin (Acre-Feet) - Dry Year Hydrologic Conditions | ||||||||||||||
Reach | Reach Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
1 | East Pass Cr below USGS gage 06289800 | 506 | 458 | 592 | 790 | 1,407 | 1,317 | 673 | 398 | 475 | 620 | 578 | 551 | 8,364 |
2 | East Pass Cr below USGS gage 06289820 | 527 | 472 | 600 | 804 | 1,455 | 1,387 | 743 | 470 | 565 | 688 | 628 | 586 | 8,926 |
3 | Elkhorn Creek below USGS gage 06288975 | 81 | 70 | 83 | 141 | 317 | 246 | 133 | 109 | 91 | 104 | 97 | 90 | 1,562 |
4 | 'Red Canyon Creek below USGS gage 06289100 | 23 | 17 | 24 | 125 | 258 | 101 | 32 | 20 | 23 | 29 | 28 | 22 | 702 |
Table 5 Available Flow for Tongue River Basin (Acre-Feet) - Wet Year Hydrologic Conditions | ||||||||||||||
Reach | Reach Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
1 | Tongue River above Little Tongue River | 3,493 | 3,099 | 4,101 | 5,652 | 34,863 | 69,125 | 25,201 | 8,354 | 5,454 | 5,369 | 4,132 | 3,715 | 172,557 |
2 | Little Tongue River | 132 | 109 | 151 | 334 | 4,235 | 7,620 | 1,320 | 56 | 0 | 238 | 164 | 143 | 14,502 |
3 | Tongue River above Wolf Creek | 3,826 | 3,343 | 4,325 | 5,986 | 39,098 | 76,744 | 26,521 | 8,410 | 5,454 | 6,123 | 4,689 | 4,156 | 188,675 |
4 | Wolf Creek | 507 | 395 | 456 | 736 | 7,343 | 12,285 | 2,000 | 0 | 10 | 1,014 | 765 | 630 | 26,141 |
5 | Tongue River above Goose Creek | 4,443 | 3,889 | 4,866 | 6,723 | 46,441 | 89,029 | 28,521 | 8,410 | 5,464 | 7,481 | 5,891 | 4,915 | 216,074 |
6 | Big Goose Creek above Rapid Creek | 904 | 1,286 | 2,907 | 3,434 | 20,500 | 45,977 | 15,058 | 2,911 | 3,258 | 1,898 | 1,341 | 1,169 | 100,643 |
7 | Rapid Creek | 69 | 73 | 140 | 48 | 622 | 1,269 | 914 | 0 | 0 | 113 | 91 | 79 | 3,418 |
8 | Big Goose Creek above Beaver Creek | 1,124 | 1,461 | 3,103 | 3,483 | 21,123 | 47,246 | 15,972 | 2,911 | 3,258 | 2,218 | 1,725 | 1,471 | 105,095 |
9 | Beaver Creek | 93 | 60 | 52 | 73 | 492 | 715 | 180 | 88 | 71 | 220 | 186 | 142 | 2,373 |
10 | Big Goose Creek above Little Goose Creek | 1,400 | 1,633 | 3,209 | 3,561 | 21,649 | 48,030 | 16,152 | 2,998 | 3,329 | 2,438 | 2,037 | 1,704 | 108,141 |
11 | Little Goose Creek | 2,224 | 2,093 | 3,152 | 3,297 | 17,881 | 21,368 | 4,782 | 1,962 | 3,047 | 3,462 | 2,966 | 2,478 | 68,712 |
12 | Goose Creek above Soldier Creek | 3,931 | 3,983 | 6,542 | 7,735 | 41,796 | 70,136 | 20,934 | 4,960 | 6,376 | 5,901 | 5,002 | 4,182 | 181,477 |
13 | Soldier Creek | 975 | 690 | 596 | 535 | 1,360 | 1,604 | 490 | 436 | 579 | 1,013 | 928 | 806 | 10,013 |
14 | Goose Creek below Soldier Creek | 4,906 | 4,767 | 7,306 | 8,477 | 44,499 | 75,198 | 22,253 | 5,480 | 7,142 | 6,914 | 6,062 | 4,988 | 197,990 |
15 | Goose Creek above Tongue River | 4,906 | 5,011 | 9,233 | 10,526 | 51,560 | 78,270 | 24,483 | 5,480 | 7,566 | 6,914 | 6,182 | 4,988 | 215,479 |
16 | Tongue River above Prairie Dog Creek | 9,349 | 8,940 | 14,121 | 17,249 | 98,002 | 167,299 | 53,003 | 14,251 | 13,030 | 14,395 | 12,185 | 9,903 | 431,727 |
17 | Prairie Dog Creek above USGS gage 06306250 | 991 | 1,816 | 5,423 | 3,027 | 8,112 | 3,531 | 2,223 | 2,239 | 2,303 | 2,132 | 1,815 | 1,449 | 35,063 |
18 | Prairie Dog Creek above Tongue River | 991 | 1,909 | 6,853 | 3,768 | 9,419 | 3,687 | 2,475 | 2,476 | 2,513 | 2,132 | 1,851 | 1,449 | 39,522 |
19 | Tongue River above State Line | 10,340 | 10,940 | 21,038 | 21,378 | 108,313 | 171,233 | 55,478 | 16,727 | 15,543 | 16,527 | 14,165 | 11,352 | 473,035 |
Table 6 Available Flow for Tongue River Basin (Acre-Feet) - Normal Year Hydrologic Conditions | ||||||||||||||
Reach | Reach Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
1 | Tongue River above Little Tongue River | 4,097 | 3,785 | 4,287 | 6,797 | 31,196 | 40,228 | 14,135 | 5,834 | 4,768 | 5,298 | 4,087 | 3,729 | 128,239 |
2 | Little Tongue River | 153 | 146 | 167 | 389 | 2,860 | 3,579 | 524 | 0 | 0 | 224 | 162 | 140 | 8,344 |
3 | Tongue River above Wolf Creek | 4,440 | 4,054 | 4,518 | 7,186 | 34,055 | 43,806 | 14,659 | 5,834 | 4,768 | 6,046 | 4,654 | 4,166 | 138,186 |
4 | Wolf Creek | 549 | 469 | 459 | 779 | 4,696 | 6,156 | 603 | 0 | 66 | 1,000 | 763 | 615 | 16,155 |
5 | Tongue River above Goose Creek | 5,203 | 4,663 | 5,051 | 7,965 | 38,751 | 49,962 | 15,262 | 5,834 | 5,061 | 7,484 | 5,868 | 5,113 | 156,217 |
6 | Big Goose Creek above Rapid Creek | 1,167 | 1,996 | 2,534 | 3,506 | 12,104 | 24,197 | 4,773 | 2,016 | 1,844 | 1,864 | 1,365 | 1,191 | 58,558 |
7 | Rapid Creek | 71 | 105 | 122 | 0 | 0 | 1,735 | 104 | 0 | 0 | 99 | 90 | 76 | 2,402 |
8 | Big Goose Creek above Beaver Creek | 1,383 | 2,196 | 2,705 | 3,506 | 12,104 | 25,933 | 4,877 | 2,016 | 2,077 | 2,219 | 1,758 | 1,491 | 62,264 |
9 | Beaver Creek | 98 | 71 | 51 | 62 | 292 | 386 | 117 | 74 | 132 | 247 | 207 | 154 | 1,890 |
10 | Big Goose Creek above Little Goose Creek | 1,663 | 2,378 | 2,808 | 3,568 | 12,431 | 26,426 | 5,152 | 2,090 | 2,604 | 2,466 | 2,129 | 1,877 | 65,590 |
11 | Little Goose Creek | 2,131 | 2,441 | 2,613 | 3,370 | 9,008 | 9,619 | 1,226 | 1,802 | 2,081 | 3,388 | 2,962 | 2,569 | 43,210 |
12 | Goose Creek above Soldier Creek | 3,957 | 4,959 | 5,472 | 8,222 | 22,407 | 36,483 | 8,086 | 3,892 | 5,273 | 5,854 | 5,091 | 4,446 | 114,140 |
13 | Soldier Creek | 679 | 548 | 475 | 507 | 905 | 901 | 600 | 348 | 774 | 960 | 884 | 786 | 8,366 |
14 | Goose Creek below Soldier Creek | 4,729 | 5,627 | 6,080 | 8,953 | 24,129 | 38,824 | 8,919 | 4,325 | 6,185 | 6,832 | 6,107 | 5,341 | 126,069 |
15 | Goose Creek above Tongue River | 5,712 | 7,430 | 8,224 | 10,623 | 24,604 | 39,850 | 9,845 | 4,327 | 6,513 | 6,832 | 6,107 | 5,341 | 135,408 |
16 | Tongue River above Prairie Dog Creek | 10,970 | 12,129 | 13,293 | 18,588 | 63,356 | 89,813 | 25,107 | 10,161 | 11,574 | 14,317 | 12,091 | 10,471 | 291,870 |
17 | Prairie Dog Creek above USGS gage 06306250 | 1,174 | 2,419 | 4,913 | 2,968 | 2,928 | 2,289 | 1,335 | 1,630 | 2,521 | 2,471 | 1,977 | 1,644 | 28,268 |
18 | Prairie Dog Creek above Tongue River | 1,418 | 3,193 | 6,645 | 3,535 | 3,000 | 2,364 | 1,511 | 1,713 | 2,727 | 2,471 | 1,977 | 1,644 | 32,198 |
19 | Tongue River above State Line | 12,437 | 15,372 | 19,950 | 22,686 | 66,751 | 92,276 | 27,317 | 11,874 | 14,461 | 16,788 | 14,097 | 12,116 | 326,123 |
Table 7 Available Flow for Tongue River Basin (Acre-Feet) - Dry Year Hydrologic Conditions | ||||||||||||||
Reach | Reach Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
1 | Tongue River above Little Tongue River | 3,004 | 2,653 | 3,226 | 7,848 | 31,008 | 19,377 | 5,581 | 3,057 | 2,722 | 4,730 | 3,749 | 3,259 | 90,215 |
2 | Little Tongue River | 107 | 90 | 113 | 353 | 2,579 | 1,392 | 0 | 0 | 0 | 193 | 143 | 122 | 5,092 |
3 | Tongue River above Wolf Creek | 3,111 | 2,773 | 3,408 | 8,201 | 33,587 | 20,768 | 5,581 | 3,057 | 2,722 | 5,505 | 4,368 | 3,381 | 96,462 |
4 | Wolf Creek | 394 | 313 | 348 | 606 | 4,271 | 2,173 | 0 | 0 | 26 | 969 | 747 | 503 | 10,350 |
5 | Tongue River above Goose Creek | 3,505 | 3,086 | 3,840 | 8,807 | 37,857 | 22,941 | 5,581 | 3,057 | 3,017 | 6,474 | 5,283 | 3,884 | 107,333 |
6 | Big Goose Creek above Rapid Creek | 1,019 | 1,132 | 2,622 | 2,573 | 13,498 | 9,327 | 84 | 0 | 0 | 1,631 | 1,265 | 1,154 | 34,305 |
7 | Rapid Creek | 64 | 64 | 123 | 0 | 0 | 584 | 0 | 0 | 0 | 74 | 87 | 76 | 1,073 |
8 | Big Goose Creek above Beaver Creek | 1,216 | 1,276 | 2,789 | 2,573 | 13,498 | 9,911 | 97 | 102 | 202 | 1,773 | 1,656 | 1,281 | 36,374 |
9 | Beaver Creek | 52 | 29 | 37 | 0 | 282 | 192 | 48 | 12 | 0 | 174 | 175 | 100 | 1,101 |
10 | Big Goose Creek above Little Goose Creek | 1,312 | 1,341 | 2,868 | 2,573 | 13,779 | 10,333 | 373 | 376 | 526 | 1,947 | 1,831 | 1,381 | 38,641 |
11 | Little Goose Creek | 1,661 | 1,581 | 2,723 | 1,357 | 6,347 | 1,038 | 887 | 932 | 1,042 | 2,661 | 2,468 | 1,789 | 24,485 |
12 | Goose Creek above Soldier Creek | 2,973 | 2,922 | 5,636 | 6,367 | 20,126 | 15,795 | 2,242 | 1,502 | 2,100 | 4,607 | 4,299 | 3,170 | 71,738 |
13 | Soldier Creek | 602 | 514 | 501 | 598 | 821 | 810 | 671 | 379 | 649 | 909 | 861 | 638 | 7,952 |
14 | Goose Creek below Soldier Creek | 3,575 | 3,436 | 6,277 | 7,133 | 21,677 | 17,157 | 2,912 | 1,880 | 2,749 | 5,517 | 5,160 | 3,808 | 81,280 |
15 | Goose Creek above Tongue River | 3,575 | 3,436 | 7,041 | 7,615 | 21,726 | 17,598 | 2,912 | 1,880 | 2,749 | 5,517 | 5,160 | 3,808 | 83,018 |
16 | Tongue River above Prairie Dog Creek | 7,080 | 6,522 | 10,881 | 16,422 | 59,584 | 40,540 | 8,494 | 4,938 | 5,765 | 11,990 | 10,443 | 7,692 | 190,351 |
17 | Prairie Dog Creek above USGS gage 06306250 | 938 | 1,975 | 4,793 | 2,043 | 1,678 | 1,279 | 878 | 1,496 | 1,928 | 2,055 | 1,695 | 1,196 | 21,953 |
18 | Prairie Dog Creek above Tongue River | 938 | 1,975 | 5,366 | 2,208 | 1,696 | 1,335 | 878 | 1,496 | 1,928 | 2,055 | 1,695 | 1,196 | 22,765 |
19 | Tongue River above State Line | 8,018 | 8,497 | 16,247 | 19,902 | 61,280 | 43,982 | 10,638 | 6,433 | 7,775 | 14,045 | 12,138 | 8,888 | 217,843 |
Table 8 Available Flow for Clear Creek Basin (Acre-Feet) - Wet Year Hydrologic Conditions | ||||||||||||||
Reach | Reach Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
1 | North Piney Creek | 225 | 215 | 333 | 1,155 | 10,872 | 16,085 | 2,167 | 415 | 182 | 556 | 400 | 225 | 32,862 |
2 | South Piney Creek | 779 | 712 | 947 | 1,393 | 6,134 | 20,952 | 8,806 | 2,959 | 1,158 | 1,702 | 1,158 | 889 | 47,589 |
3 | Piney Creek below North & South Piney Creeks | 1,004 | 927 | 1,280 | 2,549 | 17,006 | 37,038 | 10,973 | 3,374 | 1,340 | 2,259 | 1,558 | 1,444 | 80,451 |
4 | Piney Creek below USGS gage 06323000 | 1,004 | 927 | 1,280 | 2,549 | 17,006 | 37,038 | 10,973 | 3,374 | 1,762 | 2,259 | 1,558 | 1,444 | 80,873 |
5 | Piney Creek below Lake DeSmet Intake Tunnel | 1,655 | 1,142 | 2,336 | 3,204 | 17,006 | 37,038 | 12,311 | 4,386 | 1,852 | 2,655 | 2,529 | 1,150 | 87,264 |
6 | Little Piney Creek above SEO gage | 642 | 833 | 1,030 | 904 | 1,426 | 2,311 | 1,336 | 722 | 707 | 925 | 830 | 582 | 12,246 |
7 | Little Piney Creek above Piney Creek | 1,058 | 960 | 1,786 | 904 | 1,426 | 2,311 | 1,434 | 939 | 743 | 1,087 | 1,346 | 585 | 14,578 |
8 | Piney Creek below Little Piney Creek | 2,712 | 2,191 | 4,172 | 4,108 | 18,431 | 39,348 | 13,745 | 5,325 | 2,595 | 3,742 | 4,072 | 1,736 | 102,179 |
10 | Piney Creek below Box Elder Creek | 2,712 | 2,221 | 4,190 | 4,203 | 18,431 | 39,348 | 13,745 | 5,325 | 2,595 | 3,742 | 4,072 | 1,736 | 102,322 |
11 | Piney Creek above Clear Creek | 2,712 | 3,224 | 5,689 | 5,198 | 18,431 | 39,348 | 13,745 | 5,325 | 2,595 | 3,742 | 4,072 | 1,736 | 105,819 |
12 | Rock Creek | 524 | 815 | 1,408 | 1,274 | 8,173 | 12,220 | 2,799 | 769 | 615 | 1,008 | 863 | 330 | 30,798 |
13 | Johnson Creek | 48 | 50 | 83 | 38 | 326 | 456 | 0 | 0 | 0 | 122 | 134 | 45 | 1,304 |
14 | Rock Creek below Johnson Creek | 573 | 865 | 1,491 | 1,451 | 9,102 | 12,676 | 2,799 | 769 | 615 | 1,130 | 997 | 376 | 32,844 |
15 | Rock Creek above Clear Creek | 573 | 865 | 1,491 | 1,451 | 9,102 | 12,676 | 2,799 | 769 | 615 | 1,130 | 997 | 376 | 32,844 |
16 | French Creek | 73 | 53 | 57 | 55 | 1,135 | 1,981 | 1,672 | 182 | 0 | 118 | 141 | 55 | 5,523 |
17 | Clear Creek above City of Buffalo | 1,046 | 1,423 | 1,982 | 2,929 | 15,386 | 21,221 | 8,254 | 1,672 | 1,168 | 2,226 | 1,945 | 756 | 60,007 |
18 | Clear Creek above French Creek | 1,046 | 1,423 | 1,982 | 2,929 | 15,449 | 21,221 | 8,254 | 1,672 | 1,168 | 2,226 | 1,945 | 756 | 60,070 |
19 | Clear Creek above Rock Creek | 1,119 | 1,476 | 2,039 | 2,984 | 16,584 | 23,202 | 9,926 | 1,854 | 1,398 | 2,344 | 2,086 | 811 | 65,823 |
20 | Clear Creek below Rock Creek | 1,691 | 2,341 | 3,530 | 4,435 | 25,686 | 35,878 | 12,725 | 2,624 | 2,014 | 3,474 | 3,084 | 1,186 | 98,668 |
21 | Clear Creek above Healy Reservoir | 1,691 | 2,658 | 3,530 | 4,435 | 25,686 | 35,878 | 12,725 | 2,624 | 2,014 | 4,444 | 3,084 | 1,186 | 99,955 |
23 | Clear Creek above Piney Creek | 1,691 | 3,911 | 4,824 | 5,374 | 25,686 | 35,878 | 12,725 | 2,624 | 2,014 | 4,444 | 3,128 | 1,186 | 103,486 |
24 | Clear Creek above Double Crossing | 4,404 | 7,135 | 10,514 | 10,678 | 44,118 | 75,227 | 26,470 | 7,949 | 4,609 | 8,186 | 7,200 | 2,922 | 209,410 |
25 | Clear Creek below Double Crossing | 4,404 | 7,135 | 10,514 | 10,929 | 44,118 | 75,227 | 26,470 | 7,949 | 4,609 | 8,186 | 7,200 | 2,922 | 209,661 |
26 | Clear Creek above USGS gage 06324000 | 4,404 | 7,135 | 10,514 | 10,929 | 44,118 | 75,227 | 26,470 | 7,949 | 4,609 | 8,186 | 7,200 | 2,922 | 209,661 |
27 | Clear Creek above Powder River | 4,440 | 7,568 | 11,728 | 10,929 | 44,118 | 75,227 | 27,431 | 8,047 | 4,609 | 8,186 | 7,345 | 2,922 | 212,547 |
28 | Powder River above Clear Creek | 7,589 | 11,731 | 30,400 | 20,315 | 102,759 | 87,040 | 26,344 | 8,276 | 4,655 | 16,458 | 11,810 | 6,250 | 333,625 |
29 | Powder River above State Line | 12,118 | 19,360 | 42,163 | 31,243 | 146,877 | 162,267 | 53,775 | 16,330 | 9,263 | 24,643 | 19,325 | 9,172 | 546,537 |
Table 9 Available Flow for Clear Creek Basin (Acre-Feet) - Normal Year Hydrologic Conditions | ||||||||||||||
Reach | Reach Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
1 | North Piney Creek | 171 | 173 | 282 | 891 | 5,910 | 5,342 | 714 | 217 | 197 | 427 | 316 | 188 | 14,829 |
2 | South Piney Creek | 472 | 422 | 578 | 788 | 3,263 | 10,730 | 3,104 | 1,680 | 1,235 | 1,036 | 741 | 525 | 24,574 |
3 | Piney Creek below North & South Piney Creeks | 642 | 595 | 861 | 1,678 | 9,173 | 16,073 | 3,818 | 1,897 | 1,432 | 1,463 | 1,057 | 713 | 39,403 |
4 | Piney Creek below USGS gage 06323000 | 642 | 595 | 861 | 1,678 | 9,173 | 16,073 | 3,818 | 2,047 | 1,432 | 1,463 | 1,057 | 713 | 39,552 |
5 | Piney Creek below Lake DeSmet Intake Tunnel | 914 | 656 | 1,389 | 2,465 | 9,915 | 16,073 | 3,818 | 2,631 | 1,858 | 1,463 | 1,668 | 1,036 | 43,887 |
6 | Little Piney Creek above SEO gage | 549 | 707 | 950 | 954 | 904 | 828 | 652 | 584 | 718 | 744 | 722 | 580 | 8,892 |
7 | Little Piney Creek above Piney Creek | 781 | 781 | 1,533 | 1,339 | 904 | 828 | 652 | 750 | 931 | 744 | 1,139 | 842 | 11,224 |
8 | Piney Creek below Little Piney Creek | 1,823 | 1,524 | 2,971 | 3,804 | 10,819 | 16,901 | 4,470 | 3,504 | 3,595 | 3,045 | 3,091 | 2,080 | 57,629 |
10 | Piney Creek below Box Elder Creek | 1,851 | 1,543 | 2,979 | 3,926 | 10,819 | 16,901 | 4,470 | 3,504 | 3,595 | 3,045 | 3,150 | 2,126 | 57,910 |
11 | Piney Creek above Clear Creek | 2,483 | 2,956 | 5,419 | 4,932 | 10,819 | 16,901 | 4,470 | 3,504 | 3,595 | 3,823 | 4,018 | 2,659 | 65,579 |
12 | Rock Creek | 283 | 441 | 1,061 | 766 | 3,283 | 4,820 | 954 | 479 | 439 | 545 | 417 | 297 | 13,787 |
13 | Johnson Creek | 28 | 32 | 62 | 0 | 0 | 0 | 0 | 0 | 0 | 86 | 74 | 42 | 324 |
14 | Rock Creek below Johnson Creek | 311 | 474 | 1,123 | 1,203 | 3,283 | 4,820 | 954 | 479 | 514 | 631 | 491 | 339 | 14,623 |
15 | Rock Creek above Clear Creek | 311 | 474 | 1,123 | 1,203 | 3,283 | 4,820 | 954 | 479 | 514 | 631 | 491 | 339 | 14,623 |
16 | French Creek | 63 | 45 | 49 | 67 | 552 | 1,022 | 619 | 0 | 0 | 170 | 125 | 94 | 2,805 |
17 | Clear Creek above City of Buffalo | 457 | 526 | 1,090 | 2,159 | 6,836 | 11,079 | 3,063 | 1,339 | 1,501 | 1,115 | 757 | 563 | 30,483 |
18 | Clear Creek above French Creek | 457 | 526 | 1,090 | 2,261 | 6,836 | 11,079 | 3,063 | 1,339 | 1,501 | 1,115 | 757 | 563 | 30,586 |
19 | Clear Creek above Rock Creek | 520 | 571 | 1,138 | 2,329 | 7,388 | 12,101 | 3,682 | 1,339 | 1,614 | 1,285 | 882 | 656 | 33,504 |
20 | Clear Creek below Rock Creek | 831 | 1,044 | 2,262 | 3,532 | 10,670 | 16,921 | 4,636 | 1,818 | 2,127 | 1,916 | 1,373 | 996 | 48,127 |
21 | Clear Creek above Healy Reservoir | 831 | 1,044 | 2,262 | 3,532 | 10,670 | 16,921 | 4,636 | 1,818 | 2,127 | 1,916 | 1,373 | 996 | 48,127 |
23 | Clear Creek above Piney Creek | 1,197 | 2,062 | 4,148 | 4,253 | 10,670 | 16,921 | 4,636 | 1,818 | 2,127 | 2,638 | 1,933 | 1,364 | 53,768 |
24 | Clear Creek above Double Crossing | 3,680 | 5,128 | 9,624 | 9,332 | 21,489 | 33,822 | 9,106 | 5,322 | 5,723 | 6,461 | 5,951 | 4,023 | 119,660 |
25 | Clear Creek below Double Crossing | 3,680 | 5,673 | 9,946 | 9,798 | 21,489 | 33,822 | 9,106 | 5,322 | 5,723 | 6,461 | 5,951 | 4,023 | 120,994 |
26 | Clear Creek above USGS gage 06324000 | 3,680 | 5,852 | 10,041 | 9,798 | 21,489 | 33,822 | 9,106 | 5,322 | 6,083 | 6,461 | 5,951 | 4,023 | 121,630 |
27 | Clear Creek above Powder River | 3,734 | 6,701 | 10,850 | 9,798 | 21,489 | 33,822 | 9,635 | 5,322 | 6,083 | 6,523 | 5,951 | 4,023 | 123,932 |
28 | Powder River above Clear Creek | 6,519 | 13,902 | 25,996 | 22,124 | 40,971 | 37,368 | 14,105 | 6,557 | 6,452 | 9,968 | 9,003 | 6,715 | 199,680 |
29 | Powder River above State Line | 10,319 | 20,648 | 36,869 | 31,922 | 62,461 | 71,190 | 23,837 | 11,879 | 12,535 | 16,672 | 14,954 | 10,739 | 324,023 |
Table 10 Available Flow for Clear Creek Basin (Acre-Feet) - Dry Year Hydrologic Conditions | ||||||||||||||
Reach | Reach Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
1 | North Piney Creek | 102 | 96 | 127 | 1,422 | 3,684 | 1,116 | 263 | 77 | 61 | 294 | 179 | 116 | 7,536 |
2 | South Piney Creek | 284 | 260 | 331 | 758 | 2,029 | 4,195 | 1,770 | 707 | 436 | 680 | 373 | 306 | 12,129 |
3 | Piney Creek below North & South Piney Creeks | 387 | 356 | 458 | 2,180 | 5,713 | 5,311 | 2,033 | 784 | 497 | 974 | 552 | 422 | 19,666 |
4 | Piney Creek below USGS gage 06323000 | 387 | 356 | 458 | 2,180 | 5,713 | 5,311 | 2,871 | 1,073 | 1,094 | 974 | 552 | 422 | 21,391 |
5 | Piney Creek below Lake DeSmet Intake Tunnel | 1,168 | 464 | 548 | 2,517 | 5,713 | 5,311 | 3,138 | 1,668 | 1,621 | 974 | 1,305 | 1,262 | 25,688 |
6 | Little Piney Creek above SEO gage | 627 | 589 | 941 | 809 | 263 | 534 | 660 | 538 | 586 | 766 | 760 | 636 | 7,708 |
7 | Little Piney Creek above Piney Creek | 1,894 | 768 | 1,128 | 934 | 263 | 534 | 721 | 836 | 868 | 766 | 1,799 | 1,901 | 12,411 |
8 | Piney Creek below Little Piney Creek | 3,181 | 1,307 | 1,717 | 3,451 | 5,976 | 5,845 | 3,859 | 3,013 | 2,522 | 3,235 | 3,416 | 3,176 | 40,699 |
10 | Piney Creek below Box Elder Creek | 3,181 | 1,307 | 1,717 | 3,657 | 5,976 | 5,845 | 3,859 | 3,013 | 2,522 | 3,235 | 3,416 | 3,176 | 40,905 |
11 | Piney Creek above Clear Creek | 3,670 | 1,828 | 2,931 | 3,810 | 5,976 | 5,845 | 3,859 | 3,013 | 2,522 | 4,247 | 4,579 | 3,176 | 45,456 |
12 | Rock Creek | 315 | 485 | 904 | 173 | 2,269 | 617 | 0 | 0 | 0 | 409 | 379 | 342 | 5,890 |
13 | Johnson Creek | 28 | 30 | 47 | 0 | 0 | 0 | 0 | 0 | 0 | 59 | 60 | 39 | 263 |
14 | Rock Creek below Johnson Creek | 343 | 515 | 951 | 905 | 2,269 | 617 | 146 | 97 | 111 | 467 | 439 | 381 | 7,241 |
15 | Rock Creek above Clear Creek | 343 | 515 | 951 | 905 | 2,269 | 617 | 146 | 97 | 111 | 467 | 439 | 381 | 7,241 |
16 | French Creek | 66 | 47 | 44 | 0 | 410 | 161 | 240 | 0 | 0 | 180 | 138 | 90 | 1,376 |
17 | Clear Creek above City of Buffalo | 643 | 919 | 1,106 | 2,403 | 4,118 | 2,681 | 530 | 339 | 322 | 1,000 | 871 | 776 | 15,707 |
18 | Clear Creek above French Creek | 643 | 919 | 1,106 | 2,403 | 4,118 | 2,681 | 530 | 339 | 322 | 1,000 | 871 | 776 | 15,707 |
19 | Clear Creek above Rock Creek | 709 | 966 | 1,150 | 2,403 | 4,528 | 2,841 | 769 | 339 | 322 | 1,180 | 1,009 | 867 | 17,082 |
20 | Clear Creek below Rock Creek | 1,052 | 1,480 | 2,101 | 3,308 | 6,797 | 3,458 | 915 | 436 | 433 | 1,647 | 1,448 | 1,248 | 24,323 |
21 | Clear Creek above Healy Reservoir | 1,052 | 1,480 | 2,101 | 3,308 | 6,797 | 3,458 | 915 | 436 | 433 | 1,647 | 1,448 | 1,248 | 24,323 |
23 | Clear Creek above Piney Creek | 1,294 | 2,120 | 3,625 | 3,308 | 6,797 | 3,458 | 915 | 436 | 433 | 2,440 | 2,165 | 1,287 | 28,278 |
24 | Clear Creek above Double Crossing | 4,964 | 3,949 | 6,584 | 7,413 | 12,773 | 9,303 | 4,774 | 3,449 | 2,955 | 6,687 | 6,744 | 4,462 | 74,056 |
25 | Clear Creek below Double Crossing | 4,964 | 3,949 | 8,902 | 8,139 | 12,773 | 9,303 | 4,774 | 3,449 | 2,955 | 6,687 | 6,744 | 4,462 | 77,102 |
26 | Clear Creek above USGS gage 06324000 | 4,964 | 3,949 | 8,956 | 8,554 | 12,773 | 9,400 | 4,774 | 3,449 | 3,482 | 6,687 | 6,744 | 4,462 | 78,194 |
27 | Clear Creek above Powder River | 4,964 | 3,949 | 9,016 | 8,554 | 12,773 | 10,282 | 4,774 | 3,698 | 3,482 | 7,125 | 7,038 | 4,462 | 80,118 |
28 | Powder River above Clear Creek | 6,602 | 9,561 | 18,787 | 13,486 | 20,647 | 10,304 | 5,594 | 3,013 | 2,122 | 8,145 | 8,998 | 5,803 | 113,062 |
29 | Powder River above State Line | 11,567 | 13,510 | 27,822 | 22,040 | 33,420 | 20,735 | 10,368 | 6,822 | 5,603 | 15,447 | 16,172 | 10,265 | 193,770 |
Table 11 Available Flow for Crazy Woman Creek Basin (Acre-Feet) - Wet Year Hydrologic Conditions | ||||||||||||||
Reach | Reach Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
1 | Kelly Creek | 10 | 8 | 8 | 98 | 679 | 731 | 180 | 95 | 20 | 17 | 13 | 11 | 1,870 |
2 | Little North Fork Crazy Woman Creek | 22 | 18 | 19 | 214 | 1,499 | 1,602 | 371 | 182 | 36 | 38 | 29 | 25 | 4,055 |
3 | North Fork Crazy Woman Creek | 79 | 57 | 69 | 761 | 7,592 | 10,292 | 1,619 | 714 | 143 | 141 | 98 | 87 | 21,650 |
4 | N Fk Crazy Woman Cr bel. Kelly & Little N Fk | 111 | 84 | 96 | 1,073 | 9,769 | 12,626 | 2,170 | 990 | 199 | 195 | 139 | 124 | 27,575 |
5 | Muddy Creek | 17 | 14 | 16 | 198 | 1,347 | 1,398 | 318 | 150 | 19 | 27 | 20 | 18 | 3,541 |
6 | Billy Creek | 10 | 9 | 12 | 137 | 443 | 401 | 93 | 77 | 16 | 12 | 10 | 10 | 1,230 |
7 | N Fk Crazy Woman Cr bel. Muddy & Billy Cr | 137 | 107 | 123 | 1,408 | 11,559 | 14,425 | 2,581 | 1,217 | 234 | 234 | 169 | 152 | 32,346 |
8 | Middle Fork Crazy Woman Creek | 75 | 60 | 82 | 885 | 5,421 | 6,630 | 1,386 | 865 | 177 | 108 | 79 | 75 | 15,842 |
9 | Crazy Woman Cr above S Fk Crazy Woman Cr | 213 | 167 | 205 | 2,293 | 16,980 | 21,055 | 3,967 | 2,082 | 411 | 342 | 248 | 227 | 48,189 |
10 | Crazy Woman Cr above Trabing Bridge | 213 | 167 | 205 | 2,705 | 16,980 | 21,055 | 3,967 | 2,082 | 411 | 342 | 248 | 227 | 48,600 |
11 | Crazy Woman Cr above Upper Station | 792 | 1,494 | 2,802 | 3,472 | 20,742 | 21,055 | 3,967 | 2,082 | 411 | 2,439 | 1,522 | 720 | 61,498 |
Table 12 Avaliable Flow for Crazy Woman Creek Basin (Acre-Feet) - Normal Year Hydrologic Conditions | ||||||||||||||
Reach | Reach Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
1 | Kelly Creek | 9 | 7 | 8 | 64 | 279 | 283 | 86 | 37 | 20 | 17 | 11 | 11 | 831 |
2 | Little North Fork Crazy Woman Creek | 21 | 15 | 17 | 136 | 598 | 587 | 160 | 65 | 32 | 39 | 26 | 25 | 1,720 |
3 | North Fork Crazy Woman Creek | 67 | 49 | 58 | 538 | 3,544 | 3,251 | 780 | 279 | 133 | 128 | 87 | 82 | 8,995 |
4 | N Fk Crazy Woman Cr bel. Kelly & Little N Fk | 97 | 71 | 83 | 739 | 4,421 | 4,120 | 1,025 | 380 | 185 | 184 | 124 | 117 | 11,546 |
5 | Muddy Creek | 16 | 12 | 14 | 125 | 511 | 470 | 87 | 26 | 0 | 28 | 18 | 18 | 1,325 |
6 | Billy Creek | 9 | 8 | 10 | 74 | 179 | 143 | 39 | 39 | 8 | 12 | 9 | 9 | 539 |
7 | N Fk Crazy Woman Cr bel. Muddy & Billy Cr | 122 | 91 | 107 | 937 | 5,111 | 4,734 | 1,151 | 445 | 193 | 224 | 151 | 144 | 13,410 |
8 | Middle Fork Crazy Woman Creek | 64 | 53 | 75 | 652 | 2,684 | 2,366 | 667 | 344 | 90 | 100 | 70 | 70 | 7,235 |
9 | Crazy Woman Cr above S Fk Crazy Woman Cr | 186 | 144 | 182 | 1,589 | 7,795 | 7,100 | 1,818 | 789 | 283 | 324 | 221 | 215 | 20,645 |
10 | Crazy Woman Cr above Trabing Bridge | 186 | 144 | 182 | 1,589 | 7,795 | 7,100 | 2,075 | 959 | 812 | 324 | 221 | 215 | 21,602 |
11 | Crazy Woman Cr above Upper Station | 656 | 1,679 | 2,626 | 3,560 | 7,795 | 7,100 | 2,075 | 1,016 | 812 | 1,321 | 1,184 | 786 | 30,610 |
Table 13 Available Flow for Crazy Woman Creek Basin (Acre-Feet) - Dry Year Hydrologic Conditions | ||||||||||||||
Reach | Reach Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
1 | Kelly Creek | 10 | 7 | 8 | 39 | 57 | 54 | 0 | 0 | 0 | 17 | 11 | 12 | 215 |
2 | Little North Fork Crazy Woman Creek | 24 | 16 | 19 | 79 | 121 | 99 | 0 | 0 | 0 | 38 | 24 | 27 | 446 |
3 | North Fork Crazy Woman Creek | 71 | 47 | 58 | 365 | 620 | 511 | 0 | 0 | 0 | 124 | 74 | 79 | 1,949 |
4 | N Fk Crazy Woman Cr bel. Kelly & Little N Fk | 105 | 71 | 84 | 483 | 798 | 663 | 0 | 0 | 0 | 179 | 109 | 118 | 2,610 |
5 | Muddy Creek | 19 | 14 | 17 | 68 | 104 | 33 | 0 | 0 | 0 | 30 | 19 | 20 | 325 |
6 | Billy Creek | 11 | 9 | 12 | 39 | 38 | 4 | 0 | 0 | 0 | 13 | 9 | 10 | 145 |
7 | N Fk Crazy Woman Cr bel. Muddy & Billy Cr | 135 | 94 | 114 | 590 | 941 | 700 | 0 | 0 | 0 | 222 | 137 | 148 | 3,080 |
8 | Middle Fork Crazy Woman Creek | 76 | 59 | 79 | 423 | 501 | 453 | 0 | 0 | 0 | 108 | 67 | 73 | 1,839 |
9 | Crazy Woman Cr above S Fk Crazy Woman Cr | 210 | 153 | 193 | 1,013 | 1,442 | 1,153 | 0 | 0 | 0 | 330 | 204 | 221 | 4,918 |
10 | Crazy Woman Cr above Trabing Bridge | 210 | 153 | 193 | 1,013 | 1,442 | 1,788 | 532 | 168 | 123 | 330 | 204 | 221 | 6,377 |
11 | Crazy Woman Cr above Upper Station | 836 | 1,031 | 1,904 | 2,113 | 3,540 | 2,361 | 532 | 168 | 123 | 1,022 | 1,135 | 754 | 15,520 |
Table 14 Available Flow for Powder River Basin (Acre-Feet) - Wet Year Hydrologic Conditions | ||||||||||||||
Reach | Reach Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
1 | Buffalo Creek | 195 | 181 | 273 | 618 | 3,342 | 1,414 | 0 | 0 | 0 | 202 | 255 | 208 | 6,687 |
2 | Middle Fork Powder River1 | 51 | 85 | 362 | 1,601 | 11,430 | 6,449 | 418 | 268 | 600 | 117 | 242 | 85 | 21,707 |
3 | Middle Fork Powder River below Buffalo Creek | 913 | 974 | 1,395 | 2,874 | 14,771 | 7,863 | 418 | 268 | 600 | 1,221 | 1,403 | 819 | 33,518 |
4 | Beaver Creek | 1,063 | 1,113 | 1,311 | 1,181 | 2,657 | 1,489 | 258 | 263 | 641 | 1,022 | 1,079 | 889 | 12,967 |
5 | Beaver Creek below Blue Creek | 1,063 | 1,187 | 1,355 | 1,181 | 2,657 | 1,489 | 258 | 263 | 641 | 1,212 | 1,283 | 889 | 13,479 |
6 | Middle Fork Powder River below Beaver Creek | 1,975 | 2,273 | 2,817 | 4,055 | 17,429 | 9,352 | 676 | 531 | 1,241 | 2,432 | 2,927 | 1,708 | 47,417 |
7 | Middle Fk Powder River above Red Fk Powder | 1,975 | 2,466 | 2,997 | 4,055 | 17,429 | 9,352 | 676 | 531 | 1,241 | 2,432 | 2,928 | 1,708 | 47,791 |
8 | Red Fork Powder River | 1,940 | 2,358 | 2,799 | 3,040 | 12,699 | 6,977 | 536 | 404 | 926 | 2,465 | 2,883 | 1,709 | 38,738 |
9 | Middle Fk Powder River above N Fk Powder | 3,915 | 4,824 | 5,796 | 7,095 | 30,128 | 16,330 | 1,212 | 935 | 2,167 | 4,898 | 6,001 | 3,418 | 86,718 |
10 | North Fork Powder River | 1,145 | 1,291 | 1,288 | 716 | 5,136 | 4,353 | 98 | 48 | 156 | 1,698 | 1,822 | 1,004 | 18,757 |
11 | Powder River below N & Middle Fks Powder | 5,060 | 6,115 | 7,085 | 7,811 | 35,264 | 20,683 | 1,310 | 983 | 2,323 | 6,596 | 7,823 | 4,422 | 105,474 |
12 | Powder River above South Fork Powder | 5,060 | 6,115 | 7,805 | 7,811 | 42,733 | 37,477 | 3,051 | 983 | 2,323 | 9,932 | 7,823 | 4,422 | 134,816 |
13 | South Fork Powder River | 229 | 1,369 | 8,011 | 6,589 | 17,715 | 5,530 | 1,989 | 2,067 | 15 | 418 | 370 | 123 | 44,427 |
14 | Powder River above Salt Creek | 5,290 | 7,484 | 15,096 | 14,400 | 60,729 | 43,564 | 5,694 | 3,051 | 2,642 | 10,350 | 8,193 | 4,544 | 181,036 |
15 | Salt Creek | 1,452 | 2,090 | 4,095 | 2,469 | 12,546 | 7,727 | 9,183 | 1,613 | 1,638 | 3,694 | 1,879 | 993 | 49,377 |
16 | Powder River below Salt Creek | 6,741 | 9,573 | 19,191 | 16,870 | 73,310 | 51,299 | 14,882 | 4,663 | 4,280 | 14,044 | 10,072 | 5,537 | 230,461 |
17 | Powder River above Crazy Woman Creek | 6,741 | 9,573 | 23,790 | 16,870 | 80,197 | 61,924 | 20,283 | 5,915 | 4,280 | 14,044 | 10,072 | 5,537 | 259,255 |
18 | Crazy Woman Creek above Powder River | 785 | 1,487 | 3,459 | 3,445 | 22,562 | 25,117 | 5,101 | 2,206 | 375 | 2,414 | 1,505 | 712 | 69,167 |
19 | Powder River below Crazy Woman Creek | 7,527 | 11,060 | 27,253 | 20,315 | 102,759 | 87,040 | 25,422 | 8,175 | 4,655 | 16,458 | 11,577 | 6,250 | 328,489 |
Note: 1 Constrained by Instream Flow Rights of 12 cfs (July 1 - March 31) and 25 cfs (April 1 - June 30).
Table 15 Available Flow for Powder River Basin (Acre-Feet) - Normal Year Hydrologic Conditions | ||||||||||||||
Reach | Reach Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
1 | Buffalo Creek | 202 | 190 | 267 | 694 | 2,090 | 100 | 0 | 0 | 0 | 236 | 231 | 214 | 4,226 |
2 | Middle Fork Powder River1 | 0 | 0 | 0 | 280 | 6,819 | 2,957 | 0 | 0 | 0 | 0 | 0 | 0 | 10,056 |
3 | Middle Fork Powder River below Buffalo Creek | 745 | 968 | 1,324 | 3,152 | 10,841 | 6,385 | 399 | 261 | 570 | 881 | 1,085 | 821 | 27,431 |
4 | Beaver Creek | 964 | 1,244 | 1,384 | 1,175 | 1,729 | 1,474 | 233 | 240 | 553 | 956 | 1,228 | 988 | 12,166 |
5 | Beaver Creek below Blue Creek | 964 | 1,290 | 1,402 | 1,175 | 1,729 | 1,566 | 233 | 240 | 553 | 956 | 1,228 | 988 | 12,322 |
6 | Middle Fork Powder River below Beaver Creek | 1,709 | 2,258 | 2,727 | 4,327 | 12,569 | 8,716 | 632 | 500 | 1,123 | 1,837 | 2,312 | 1,809 | 40,519 |
7 | Middle Fk Powder River above Red Fk Powder | 1,709 | 2,525 | 3,423 | 4,327 | 12,569 | 8,716 | 632 | 500 | 1,123 | 1,837 | 2,312 | 1,809 | 41,483 |
8 | Red Fork Powder River | 1,658 | 2,396 | 3,155 | 3,347 | 7,408 | 4,935 | 393 | 310 | 647 | 1,790 | 2,277 | 1,788 | 30,105 |
9 | Middle Fk Powder River above N Fk Powder | 3,367 | 4,922 | 6,579 | 7,674 | 19,977 | 13,651 | 1,025 | 811 | 1,770 | 3,627 | 4,589 | 3,597 | 71,587 |
10 | North Fork Powder River | 971 | 1,272 | 1,451 | 997 | 2,629 | 1,918 | 0 | 0 | 5 | 1,284 | 1,500 | 1,119 | 13,145 |
11 | Powder River below N & Middle Fks Powder | 4,338 | 6,193 | 8,029 | 8,671 | 22,606 | 16,087 | 1,025 | 811 | 1,775 | 4,911 | 6,089 | 4,716 | 85,251 |
12 | Powder River above South Fork Powder | 4,338 | 6,653 | 8,029 | 9,371 | 22,606 | 17,055 | 1,908 | 821 | 2,730 | 5,790 | 6,089 | 4,716 | 90,107 |
13 | South Fork Powder River | 132 | 1,287 | 7,025 | 5,987 | 6,835 | 2,093 | 1,132 | 1,699 | 17 | 188 | 213 | 112 | 26,720 |
14 | Powder River above Salt Creek | 4,470 | 7,940 | 15,054 | 15,358 | 29,441 | 19,403 | 3,580 | 3,010 | 3,353 | 6,189 | 6,302 | 4,828 | 118,929 |
15 | Salt Creek | 1,306 | 2,532 | 3,882 | 3,239 | 3,750 | 4,823 | 5,081 | 1,705 | 2,350 | 2,399 | 1,540 | 1,114 | 33,722 |
16 | Powder River below Salt Creek | 5,776 | 10,472 | 18,936 | 18,597 | 33,192 | 24,225 | 8,661 | 4,715 | 5,703 | 8,588 | 7,842 | 5,943 | 152,650 |
17 | Powder River above Crazy Woman Creek | 5,776 | 10,472 | 21,140 | 18,597 | 33,192 | 29,159 | 11,002 | 5,572 | 5,732 | 8,588 | 7,842 | 5,943 | 163,014 |
18 | Crazy Woman Creek above Powder River | 648 | 1,669 | 2,919 | 3,526 | 7,779 | 8,209 | 2,328 | 985 | 720 | 1,286 | 1,162 | 773 | 32,004 |
19 | Powder River below Crazy Woman Creek | 6,424 | 12,141 | 24,059 | 22,124 | 40,971 | 37,368 | 13,330 | 6,557 | 6,452 | 9,874 | 9,003 | 6,715 | 195,018 |
Note: 1 Constrained by Instream Flow Rights of 12 cfs (July 1 - March 31) and 25 cfs (April 1 - June 30).
Table 16 Available Flow for Powder River Basin (Acre-Feet) - Dry Year Hydrologic Conditions | ||||||||||||||
Reach | Reach Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
1 | Buffalo Creek | 187 | 169 | 214 | 298 | 909 | 0 | 0 | 0 | 0 | 167 | 206 | 197 | 2,347 |
2 | Middle Fork Powder River1 | 0 | 0 | 0 | 425 | 3,840 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4,265 |
3 | Middle Fork Powder River below Buffalo Creek | 633 | 799 | 1,072 | 2,985 | 6,625 | 2,576 | 240 | 219 | 360 | 586 | 829 | 597 | 17,521 |
4 | Beaver Creek | 921 | 1,164 | 1,365 | 961 | 943 | 830 | 199 | 248 | 405 | 820 | 1,096 | 817 | 9,767 |
5 | Beaver Creek below Blue Creek | 921 | 1,164 | 1,399 | 961 | 943 | 846 | 199 | 248 | 405 | 820 | 1,096 | 817 | 9,817 |
6 | Middle Fork Powder River below Beaver Creek | 1,553 | 1,964 | 2,471 | 3,946 | 7,568 | 3,421 | 438 | 467 | 765 | 1,407 | 1,925 | 1,414 | 27,338 |
7 | Middle Fk Powder River above Red Fk Powder | 1,553 | 1,964 | 2,651 | 3,946 | 7,568 | 3,421 | 438 | 467 | 765 | 1,407 | 1,925 | 1,414 | 27,518 |
8 | Red Fork Powder River | 1,544 | 1,892 | 2,451 | 2,332 | 3,262 | 1,603 | 205 | 268 | 358 | 1,487 | 1,903 | 1,435 | 18,740 |
9 | Middle Fk Powder River above N Fk Powder | 3,097 | 3,856 | 5,101 | 6,278 | 10,831 | 5,024 | 643 | 735 | 1,123 | 2,894 | 3,828 | 2,849 | 46,258 |
10 | North Fork Powder River | 919 | 1,089 | 1,278 | 385 | 1,069 | 0 | 0 | 0 | 0 | 1,090 | 1,288 | 917 | 8,036 |
11 | Powder River below N & Middle Fks Powder | 4,016 | 4,945 | 6,379 | 6,662 | 11,900 | 5,024 | 643 | 735 | 1,123 | 3,984 | 5,116 | 3,766 | 54,294 |
12 | Powder River above South Fork Powder | 4,016 | 4,945 | 6,379 | 6,662 | 11,900 | 5,024 | 900 | 735 | 1,123 | 4,159 | 5,229 | 3,766 | 54,840 |
13 | South Fork Powder River | 94 | 1,074 | 3,574 | 2,698 | 3,480 | 564 | 377 | 864 | 6 | 90 | 121 | 84 | 13,026 |
14 | Powder River above Salt Creek | 4,110 | 6,019 | 9,953 | 9,360 | 15,380 | 5,588 | 1,886 | 1,599 | 1,129 | 4,674 | 5,648 | 3,850 | 69,196 |
15 | Salt Creek | 1,660 | 2,515 | 2,780 | 2,108 | 1,851 | 1,044 | 3,197 | 1,054 | 924 | 1,898 | 1,799 | 1,206 | 22,035 |
16 | Powder River below Salt Creek | 5,770 | 8,534 | 12,733 | 11,468 | 17,231 | 6,632 | 5,083 | 2,652 | 2,053 | 6,572 | 7,446 | 5,056 | 91,231 |
17 | Powder River above Crazy Woman Creek | 5,770 | 8,534 | 16,245 | 11,468 | 17,231 | 7,179 | 5,083 | 2,652 | 2,053 | 6,655 | 7,507 | 5,056 | 95,434 |
18 | Crazy Woman Creek above Powder River | 832 | 1,028 | 2,418 | 2,018 | 3,415 | 2,241 | 551 | 158 | 69 | 988 | 1,114 | 747 | 15,539 |
19 | Powder River below Crazy Woman Creek | 6,602 | 9,561 | 18,663 | 13,486 | 20,647 | 9,420 | 5,594 | 2,810 | 2,122 | 7,643 | 8,622 | 5,803 | 110,973 |
Note: 1 Constrained by Instream Flow Rights of 12 cfs (July 1 - March 31) and 25 cfs (April 1 - June 30).
Table 17 Available Flow for Little Powder River Basin (Acre-Feet) - Wet Year Hydrologic Conditions | ||||||||||||||
Reach | Reach Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
1 | Little Powder River above USGS gage 06324925 | 562 | 7,548 | 14,241 | 2,860 | 9,079 | 2,733 | 377 | 279 | 53 | 2,316 | 180 | 143 | 40,372 |
2 | Little Powder River above USGS gage 06324970 | 1,195 | 7,548 | 14,241 | 2,860 | 13,237 | 3,354 | 1,044 | 426 | 226 | 2,722 | 485 | 375 | 47,714 |
3 | Little Powder River above State Line | 1,203 | 7,553 | 14,243 | 2,860 | 13,237 | 3,354 | 1,044 | 426 | 226 | 2,782 | 520 | 391 | 47,838 |
Table 18 Available Flow for Little Powder River Basin (Acre-Feet) - Normal Year Hydrologic Conditions | ||||||||||||||
Reach | Reach Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
1 | Little Powder River above USGS gage 06324925 | 405 | 1,109 | 1,553 | 1,119 | 1,970 | 1,683 | 625 | 309 | 246 | 283 | 144 | 65 | 9,511 |
2 | Little Powder River above USGS gage 06324970 | 548 | 1,493 | 2,209 | 1,396 | 2,190 | 1,894 | 674 | 337 | 268 | 450 | 254 | 142 | 11,853 |
3 | Little Powder River above State Line | 556 | 1,497 | 2,210 | 1,396 | 2,190 | 1,894 | 674 | 337 | 268 | 504 | 289 | 159 | 11,974 |
Table 19 Available Flow for Little Powder River Basin (Acre-Feet) - Dry Year Hydrologic Conditions | ||||||||||||||
Reach | Reach Name | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
1 | Little Powder River above USGS gage 06324925 | 24 | 319 | 399 | 284 | 474 | 220 | 64 | 74 | 13 | 19 | 26 | 30 | 1,946 |
2 | Little Powder River above USGS gage 06324970 | 60 | 481 | 630 | 344 | 560 | 239 | 105 | 74 | 17 | 41 | 54 | 69 | 2,674 |
3 | Little Powder River above State Line | 63 | 482 | 630 | 344 | 560 | 239 | 105 | 74 | 43 | 53 | 69 | 75 | 2,737 |
Tongue River
The allocable flows of the Tongue River drainage are to be divided between the two States in accordance with the following percentages per the Yellowstone River Compact:
Wyoming 40%The State of Montana sponsored a study in 1990/1991 to determine the amount of water available for storage in the, then proposed, enlargement of Tongue River Reservoir (GeoResearch Inc., July 18, 1991). The State of Wyoming also made a determination of Wyoming's supplemental water needs for pre-1950 water rights during this same time frame (Lowry, June 19, 1990). HKM utilized information from both of these sources in evaluating Wyoming's share of Tongue River water.
Montana 60%
This evaluation is based on the following assumptions:
In a letter sent to the State of Montana in 1990, Wyoming has claimed a need for 18,702 acre-feet of additional water to supplement the supply of pre-1950 rights (Lowry, June 19, 1990). To fully supply these needs, additional reservoir storage with pre-1950 storage rights would likely be required.
The work sponsored by the State of Montana in 1990/1991 makes the assumption that the following four adjustments should be made to the streamflow at Miles City to account for unused pre-1950 rights or supplemental supplies to pre-1950 rights (GeoResearch Inc., July 18, 1991).
In order to represent the wide range of possible interpretations, HKM has made two estimates of Wyoming's remaining allocation of Tongue River water per the Yellowstone River Compact (a conservative estimate and a liberal estimate) as summarized in Table 21. For the liberal estimate, the flow at Miles City is only adjusted to reflect increased depletions for supplemental supply to pre-1950 rights in Wyoming. For the conservative estimate, all of the aforementioned adjustments are included. The actual remaining allocation, to finally be determined at some undefined time in the future, will likely fall somewhere in the middle of this range of estimates.
Table 21 Wyoming's Remaining Allocation of Available Flow per Yellowstone River Compact | |||
Hydrologic Condition | Tongue River Basin | Powder River Basin | |
Conservative Estimate | Liberal Estimate | ||
Wet Years | 163,000 | 189,000 | 211,500 |
Normal Years | 90,000 | 117,000 | 131,100 |
Dry Years | 40,000 | 67,000 | 74,300 |
The derivation of these estimates is described on the worksheet provided with this memorandum. The Wyoming Water Planning Program estimated Wyoming's average annual unused and unappropriated portion of the Tongue River to be 96,400 acre-feet for the 1948 through 1968 study period (SEO, 1972).
Powder River
The allocable flows of the Powder River drainage are to be divided between the two States in accordance with the following percentages per the Yellowstone River Compact:
Wyoming 42%Wyoming's allocation of the Powder River is based on the estimate reported in the previous water plan as directed by the SEO (Tavelli, October 2001). This estimate has, however, been adjusted to reflect the current study period. The water availability presented in the 1972 water plan was based on the 21-year study period of 1948 through 1968; whereas, the current study utilizes the 30-year period 1970 through 1999. The average annual flow of the Powder River near Locate for the 1948 . 1968 study period is 377,100. The corresponding average for the 1970 . 1999 study period is 424,400. Wyoming's average annual unused and unappropriated portion of the Powder River estimated through the earlier study is 120,700 acre-feet. This value is adjusted upwards by 12.5% to 135,800 to reflect the somewhat wetter average annual flow during the current study period. Wyoming's allocation of the available flows of the Powder River is summarized in Table 21 for each of the three hydrologic conditions. The derivation of these estimates is described on the worksheet provided with this memorandum.
Montana 58%
REFERENCES
GeoResearch Inc., July 18, 1991. Tongue River Water Allocation Model Program Documentation, for Montana Department of Natural Resources and Conservation. Helena, Montana
HKM Engineering Inc., 2002. Environmental Water Uses, Technical Memorandum, Powder/Tongue River Basin Plan. Billings, Montana
HKM Engineering Inc., 2002. Spreadsheet Model Development and Calibration, Technical Memorandum, Powder/Tongue River Basin Plan. Billings, Montana
HKM Engineering Inc., 2002. Surface Water Hydrology, Technical Memorandum, Powder/Tongue River Basin Plan. Billings, Montana
Lord Consulting, 2002, Legal and Institutional Constraints, Technical Memorandum, Powder/Tongue River Basin Plan. Laramie, Wyoming
Lowry, Sue, Wyoming Interstate Streams Engineer. June 19, 1990, Letter to Glen McDonald, Supervisor Project Rehabilitation Section, Montana Department of Natural Resources and Conservation
Tavelli, Chace, Office of the Wyoming State Engineer. October 5, 2001, Letter to Wade Irion, Project Manager, HKM Engineering regarding Compact allocations of available flow
Wyoming State Engineer's Office (SEO), April 1972, Wyoming Water Planning Program, Report 10, Water & Related Land Resources of Northeastern Wyoming, Cheyenne, Wyoming
Wyoming State Engineer's Office (SEO), 1982. Documents on the Use and Control of Wyoming's Interstate Streams - Compacts, Treaties, and Court Decrees, Cheyenne, Wyoming