Western Gas Resources No. 8 Reservoir Report
Nearby: Enl. Sage No. 1 Sandstone No. 1
Last Updated: December 13, 2025
Western Gas Resources No.
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Summary
8 is a private earth dam located in Johnson, Wyoming, designed by S. Bruce of Bruce Engineering, Inc. Completed in 2004, this dam serves primarily for irrigation purposes on a tributary of East Flying Creek. With a height of 50 feet and a hydraulic height of 45 feet, the dam has a storage capacity of 234 acre-feet and a surface area of 11.7 acres.
Despite being classified as having a low hazard potential and fair condition assessment, Western Gas Resources No. 8 is subject to state regulation, inspection, and enforcement. The dam's spillway is uncontrolled with a width of 14 feet, and it features a slide (sluice gate) outlet gate. The last inspection in June 2017 deemed the dam to be in acceptable condition, with an inspection frequency of every 5 years.
Located on County Road in Wyoming, this dam poses a moderate risk level and is situated within Congressional District 00, represented by Liz Cheney. With a drainage area of 0.1 square miles and a maximum discharge of 973 cubic feet per second, Western Gas Resources No. 8 plays a crucial role in water resource management in the region, showcasing the intersection of infrastructure, climate, and environmental stewardship.
Year Completed |
2004 |
Dam Length |
1059 |
Dam Height |
50 |
River Or Stream |
TRIB. OF EAST FLYING CREEK |
Primary Dam Type |
Earth |
Surface Area |
11.7 |
Hydraulic Height |
45 |
Drainage Area |
0.1 |
Nid Storage |
234 |
Structural Height |
50 |
Outlet Gates |
Slide (sluice gate) - 1 |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
50 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wild Horse Creek Near Arvada
|
0cfs |
Powder River At Arvada
|
180cfs |
Clear Creek Near Buffalo
|
18cfs |
Piney Creek At Kearny
|
113cfs |
Rock Creek Near Buffalo
|
70cfs |
Stonepile Creek At Mouth
|
3cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Western Gas Resources No. 8