Summary
Completed in 1968 for flood risk reduction, Hal stands at a height of 28 feet and has a hydraulic height of 23 feet. With a storage capacity of 67 acre-feet, the dam serves its purpose effectively with a low hazard potential and fair condition assessment.
Owned by a private entity, Hal is regulated by the Wyoming State Engineer's Office, with state jurisdiction and permitting in place. The dam features an uncontrolled spillway, with a width of 82 feet, and an outlet gate for controlled water release. Although the dam has a moderate risk assessment rating, with a risk level of 3, it meets regulatory guidelines and is inspected every 5 years to ensure its structural integrity and safety.
Despite its age, Hal continues to serve its primary purpose of flood risk reduction, safeguarding the surrounding area from potential inundation. With Liz Cheney representing the Congressional district it resides in, Hal remains a vital infrastructure for water resource management and climate resilience in Platte County, Wyoming.
Year Completed |
1968 |
Dam Length |
427 |
Dam Height |
28 |
River Or Stream |
ASHENHURST DRAW |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
23 |
Nid Storage |
67 |
Structural Height |
28 |
Outlet Gates |
Other Controlled - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
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.
Hal