Wyoming State Water Plan, Wyoming Water Development Office
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Powder/Tongue WY River Basin Water Plan

As authorized by the Wyoming Water Development Commission in its contract scope of work, this planning document presents current and proposed (estimated) future uses of water in Wyoming's Powder/Tongue River Basin. Uses to be inventoried include agricultural, municipal, industrial, environmental, and recreation. Both surface and ground water uses, as well as overall water quality are described. Given current uses, the availability of surface and ground water to meet future requirements is estimated. To lay the groundwork for future water development, a review of the current institutional and legal framework facing such projects is presented. Finally, thoughts are given to guide implementation of the water planning process.

The intent of this summary report is to describe the planning study in sufficient detail for the reader to gain a general understanding of the investigations that were performed and the results of those investigations. For detailed information on a specific topic the reader is directed to the technical memorandum prepared for that topic. References used in preparing the technical memoranda are not repeated in this summary report. These references are presented in the individiual technical memoranda.

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PDF (988kb) or HTML Executive Summary for the 2002 Powder/Tongue Wyoming River Basin Final Report

PDF (28,237kb) 2002 Powder/Tongue Wyoming River Basin Final Report

PDF (470kb) or HTML Cover Page and Table of Contents for the 2002 Powder/Tongue Wyoming River Basin Plan

PDF (1,304kb) or HTML The intent of this summary report is to describe the planning study in sufficient detail for the reader to gain a general understanding of the investigations that were performed and the results of those investigations.

PDF (10,166kb) or HTML This chapter describes and quantifies the current water uses in the Powder/Tongue River Basin planning area. The quantification of current water consumption is used to evaluate the overall use of water in the Basin relative to Compact allotments, for comparing existing water use to existing water supplies, and as a basis for projecting future water demands by the various uses.

PDF (14,521kb) or HTML This chapter presents estimates of the availability of surface water to meet future water uses and also characterizes the potential for ground water development.

PDF (363kb) or HTML For assessing the need for water into the future, this plan has developed estimates of water demand for each major use category out to year 2030. These estimates are discussed in detail in technical memoranda for each topic.

PDF (1,421kb) or HTML This chapter identifies future water use opportunities that can be implemented to satisfy the water demands in the Powder/Tongue River Basins in Wyoming. The list of opportunities presented in this report is intended to be used by individuals and organizations that need to develop a water supply to satisfy their specific needs.

HTML PDF Technical Memoranda
Chapter II
Click for listing   Tab A - Irrigation Diversion Operation and Description
52 kb 31 kb   Tab B - Irrigated Crops
660 kb 2,241 kb   Tab C - Irrigated Lands Mapping and Water Rights Data
1,138 kb 364 kb   Tab D - Agricultural Water Use
144 kb 347 kb   Tab E - Municipal Water Use
113 kb 287 kb   Tab F - Domestic Water Use
231 kb 440 kb   Tab G - Industrial Water Use
141 kb 243 kb   Tab H - Recreational Uses
232 kb 608 kb   Tab I - Environmental Uses
Click for listing   Tab J - Storage Operation and Description
Chapter III
Click for listing   Tab K - Surface Water Hydrology
1,244 kb 1,470 kb   Tab L - Spreadsheet Model Development and Calibration
534 kb 221 kb   Tab M - Available Surface Water Determination
Click for listing   Tab N - Available Ground Water Determination
Chapter IV
186 kb 63 kb   Tab O - Irrigation Water Needs and Demand Projections
56 kb
58 kb   Tab P - Population Projections
153 kb 149 kb   Tab Q - Industrial Water Needs Projections
50 kb 53 kb   Tab R - Future Recreational and Environmental Water Requirements
Chapter V
167 kb 968 kb   Tab S - Future Water Use Opportunities
19 kb 36 kb   Tab T - Legal and Institutional Constraints
359 kb 602 kb   Tab U - Water Quality Issues

Powder/Tongue River Basin Water Plan
Spreadsheet Models

There are twenty four spreadsheet workbooks, one for each of three hydrologic conditions and six distinct areas:

  • Clear Creek from North Piney Creek to the Powder River at Moorhead
  • Crazy Woman Creek from Kelly Creek Headwaters to the Upper Station near Arvada
  • Little Bighorn River from East Pass Creek to Red Canyon Creek at the Stateline
  • Little Powder Creek from Corral Creek to the Stateline
  • Powder River from Crazy Woman Creek near Arvada to Salt Creek
  • Tongue River from Mead Coffeen Diversion to the Stateline near Decker

For further information including both a user's guide and engineering documentation of the models please refer to the Spreadsheet Model Development and Calibration.

Steps for Downloading the Models

The three workbooks (wet, dry and normal years) for each area are yoked together with a simple menu-driven graphical user interface (GUI), effectively creating four area models. In addition, the spreadsheet models are stored as zipped Microsoft Excel files using WinZip compression software. An evaluation version of WinZip may be downloaded at http://www.winzip.com/download.htm

  • Download the models by clicking on the file name and saving to your local directory. Depending on the browser this may entail only responding to a prompt, or choosing "Save As..." from the browser file menu.
  • Once on the local disk, double click the zipped file to extract the Excel Workbooks. A total of 4 files will be extracted for each zipped file.
  • In Microsoft Excel, open the area Model file. From this graphical user interface the wet, normal, or dry year models may be selected.
  • For further information on the use of the models please refer to the tutorial included in each of the workborks.

Spreadsheet Models
Clear Creek Model 3,386 kb compressed
20,202 kb uncompressed
Crazy Woman Creek Model 1,338 kb compressed
8,343 kb uncompressed
Little Bighorn River Model 640 kb compressed
4,333 kb uncompressed
Little Powder River Model 622 kb compressed
4,180 kb uncompressed
Powder River Model 1,621 kb compressed
11,114 kb uncompressed
Tongue River Model 2,359 kb compressed
14,198 kb uncompressed