Rafting on Snake River Lake Marie, Snowy Mountains Wyoming Wind River Range picture

Green River Basin Update


2010 Plan


Materials from the 2010 Green River Basin Plan Update can be found below by clicking on the desired chapter or section. The Plan may be viewed in either HTML or in PDF. It is recommended that users download the latest version of Adobe Acrobat (R) Reader to view the PDF files.

Green River Basin Color Map

PDF (10,246kb) Access the 2010 Green River Basin Update Final Report here

PDF (310kb) Access the 2010 Green River Basin Update Table of Contents

PDF (48kb) This 2010 Green River Basin Plan presents a basinwide perspective on water resources, updated from the 2001 Green River Basin Plan including information on the Setting, Resources, Use, Projections, Availability, and Strategies and Recommendations

PDF (14kb) Location of 2010 Green River Basin Plan materials on the web

PDF (2,296kb) This chapter presents basic physical information about the Green River Basin, current economic and social conditions, and a summary of the legal and institutional constraints on water use.

PDF (2,596kb) This chapter describes the quantity and quality of the Green River Basin.s surface water and groundwater resources.

PDF (2,417kb) This chapter presents an inventory of water use and existing water development projects in the Green River Basin.

PDF (251kb) This chapter presents estimates of water demand in the Green River Basin through year 2055 for each major water use sector.

PDF (1,326kb) The following subsections describe the analysis of existing surface water data, creation of spreadsheet-based surface water models, and use of the models. output to estimate water availability.

PDF (407kb) The objective of this chapter is to present a useful continuation of the 2001 Green River Basin Plan.s planning process.

PDF (59kb) This chapter addresses various options that project sponsors might pursue to fund these water development and management improvement projects.





PDF (1,572kb) Access the 2010 Green River Basin Update Executive Summary here




Green River Basin Water Plan
2010 Spreadsheet Models

The Wyoming Water Development Commission's statewide planning process is to provide decision-makers with current, defensible data to allow them to manage water resources for the benefit of all the state's citizens. To support this goal, spreadsheet models were developed under the original 2001 Green River Basin Plan to determine average monthly streamflow in the basin during normal, wet, and dry years. The purpose of these models was to validate existing basin uses, assist in determining timing and location of water available for future development, and help to assess impacts of future water supply alternatives.

The spreadsheet models comprise twelve Excel workbooks, one for each of three hydrologic conditions and four distinct sub-basins:

  • Upper Green River Basin from the Green River headwaters to Flaming Gorge
  • Blacks Fork River Basin from the Blacks Fork and Smiths Fork headwaters to Flaming Gorge
  • Henrys Fork River Basin from the Henrys Fork headwaters to Flaming Gorge, and
  • Little Snake River Basin from the Little Snake headwaters to the USGS stream gaging station Little Snake River near Lily, CO.

Please Read the Surface Water Data Synthesis & Spreadsheet Model Development technical memorandum for instructions on using the model.

 Click Here To Download the 2010 Hydrologic Model

In addition to the spreadsheet models created for the basin, a State Mod water availability model (http://cdss.state.co.us/software/Pages/StateMod.aspx) was also created.

 Click Here To Download the 2010 State Mod Model



Green River Basin Water Plan - 2010
Technical Memoranda

The 2010 Green River Basin Water Plan Technical Memoranda are listed in the table below and may be viewed in either HTML or PDF format. It is recommended that users download the latest version of Adobe Acrobat® Reader to view the PDF files.

PDF Technical Memoranda
1,079 kb   Climate and Climate Data
594 kb   Available Surface Water Determination
51 kb   Water Conservation Opportunities
132 kb   Domestic Use
33 kb   Domestic Use Projections
85 kb   Industrial Use
66 kb   Industrial Use Projections
112 kb   Municipal Use
62 kb   Municipal Use Projections
528 kb   Recreation Use
1.03 mb   Environmental Use
56 kb   Future Recreation and Environmental Water Use Projections
94 kb   Population Projections
192 kb   Surface Water Data Collection and Study Period Selection
77 kb   Wyoming Depletions in the Little Snake River Basin
50 kb   Water Augmentation Opportunities
875 kb   Major Reservoir Information
18 kb   Agriculture - Cropping Patterns and Irrigated Lands Mapping
89 kb   Irrigation Water Needs and Demand Projections
1.58 mb   Surface Water Data Synthesis & Spreadsheet Model Development
59 kb   Colorado River Basin Salinity Control Program
102 kb   Watershed Planning
116 kb   Institutional Constraints
821 kb   Surface Water Quality
25 kb   Bibliography



This memorandum addresses how Wyoming's use of it's contract water in Fontenelle Reservoir could affect the state.s remaining compact entitlements under the Colorado River Compacts.