Citizen    Government    Business    Visitor
Wyoming Water Development Commission 
Harry C. LaBonde, Jr., PE, Director 
6920 Yellowtail Rd, Cheyenne, WY 82002 
Phone: 307-777-7626 

Agency Information
 Mission Statement
 Commission Agendas & Minutes
 Consultant Selection
 Items Open for Public Comment
 Operating Criteria
 Project Application Information
 Send Us Your Comments

Planning Program
 Dam and Reservoir Planning
 Groundwater Grant Projects
 Instream Flow Filings
 Current Planning Projects
 River Basin Planning
 Weather Modification Study
 Probable Maximum Precipitation
 Water Research Projects

Construction Program
 Current Construction Projects
 Small Water Projects

Agency Publications
 Project Reports
 Water/Climate Web Atlas
 Irrigation & Water System Surveys
 Legislative Reports
 Water Mgmnt & Conservation Dir
 History of Wyoming Water Law

WWDC Home Page

Water Plan Home Page

WRDS Home Page

Project Reports

 89. PROJECT:Rock Springs/Green River Area Water Supply
SPONSOR:Green River-Rock Springs-Sweetwater County Joint Powers Water Board
LOCATION:Sweetwater County
PROGRAM:New Development
Purpose Chapter Session Account Appropriation Due Date
Level III 83 1990 I $23,000,000* 1998
Level III 28 1994 I $4,000,000* 1998
*67% grant, 33% loan (4%, 40 years)

The Green River is the domestic raw water supply source for the Cities of Rock Springs and Green River. Water is pumped from the Green River to an existing water treatment facility located along the northern bank of the river. After treatment, the water is pumped from the treatment plant to the distribution systems of both communities. In the case of Rock Springs, water is delivered to users through an existing 20 inch diameter pipeline that traverses the fourteen mile distance between the communities. The Cities of Rock Springs and Green River formed a joint powers board in order to purchase the privately owned water system. Prior to purchasing the system in 1986, the joint powers board sponsored a system evaluation and inventory. The evaluation indicated that the transmission pipeline had lost 35% of its original capacity and was identified as the single most expensive element and a critical "weak link" in the system.

Three subdivisions; Clearview Acres, White Mountain and Stassinos were not served by the water system when the system was operated by a private concern. In 1988, the joint powers board petitioned the Wyoming Water Development Commission to evaluate the existing transmission system. In the context of supplying water to subdivisions near Rock Springs that are not presently being served, the study was to specifically look at the 20" diameter pipeline that connects the water treatment plant in Green River to users in Rock Springs. The Wyoming Water Development Commission sponsored a Level II study that identified two system bottlenecks; namely the existing 20" diameter pipeline and the raw water intake facility located along the banks of the Green River. The existing Green River to Rock Springs pipeline could not keep pace with existing demand and the existing raw water intake could not accommodate growth or expansion of the system. Therefore, a thirty-inch diameter pipeline and a new larger intake facility were recommended for Level III construction. The Level II study also recommended that peaking storage facilities be constructed in Rock Springs.

The legislature appropriated $23,000,000 during the 1990 session for construction of new transmission and peaking facilities to serve Rock Springs and nearby subdivisions. The legislature appropriated an additional $4,000,000 to construct an additional peaking facility in Green River, new transmission facilities in Green River, additional storage in Rock Springs, and additional transmission pipelines in Rock Springs to cover the expense associated with relocating planned improvements that could not be constructed at the existing treatment plant, due to the inability of obtaining a permit from the State of Wyoming Department of Environmental Quality.

During a geotechnical investigation to determine supporting subgrade characteristics for a new clear well and pump station, hydrocarbon contamination of the soil and groundwater was discovered at the existing water treatment plant. In order to secure a State of Wyoming Department of Environmental Quality "permit to construct" improvements originally planned for the water treatment plant had to be relocated to a contamination free site.

Facilities funded by the 1990 appropriation ($23,000,000) have been completed and are providing service to the project sponsors. The transmission facilities between Rock Springs and Green River are no longer a "bottleneck" and, in fact, will serve the area for years to come. Construction bids have been received on two of the components funded by the 1994 appropriation ($4,000,000), the Wind River tank and Stagecoach pipeline. There are only two components to this project which are not presently completed. Bids were received on the Reliance pipeline and it is now completed. The entire project should be completed by the end of 1999.

No legislative action is required.

   Citizen    Government    Business    Visitor   Privacy Policy