Bliss No. 1 Reservoir Report
Nearby: Lance Creek No. 2 Lance Creek No. 1
Last Updated: December 13, 2025
Bliss No.
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Summary
1 is a privately owned irrigation dam located in Lance Creek, Wyoming, on Bills Creek. Built in 1970, this Earth-type dam stands at 33 feet tall and has a storage capacity of 428 acre-feet. Despite its age, the dam has a low hazard potential but is in poor condition according to a 2018 assessment. It features a slide (sluice gate) outlet gate and an uncontrolled spillway that is 75 feet wide.
The dam is inspected every 5 years, with the last assessment conducted in June 2018. While it is state-regulated and permitted, its condition is flagged as poor, indicating a need for maintenance and potential improvements to ensure its long-term safety and effectiveness. With a moderate risk assessment score of 3, there may be room for enhanced risk management measures to address any potential vulnerabilities and ensure the continued functionality of Bliss No. 1 for irrigation purposes in the future.
Year Completed |
1970 |
Dam Length |
690 |
Dam Height |
33 |
River Or Stream |
BILLS CREEK |
Primary Dam Type |
Earth |
Surface Area |
28 |
Hydraulic Height |
28 |
Nid Storage |
428 |
Structural Height |
33 |
Outlet Gates |
Slide (sluice gate) - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
33 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Bliss No. 1