Hannah Mahoney No. 2 Reservoir Report
Nearby: Marsh And Company No. 7 Bucklin No. 3
Last Updated: December 13, 2025
Hannah Mahoney No.
°F
°F
mph
Wind
%
Humidity
Summary
2, also known as Enl. of 824r, is a privately owned earth dam located in Muddy Gap, Wyoming. Built in 1909 for irrigation purposes, this dam stands at a height of 22 feet and has a length of 590 feet. It has a storage capacity of 107 acre-feet, with a normal storage level of 74 acre-feet, serving the local agricultural community in Carbon County.
Managed by the Wyoming State Engineer's Office, Hannah Mahoney No. 2 has been deemed to have a low hazard potential and fair condition. The dam features an uncontrolled spillway with a width of 50 feet and is equipped with a single valve outlet gate. Despite its moderate risk assessment, the dam has passed its last inspection in October 2021 and is subject to regular maintenance and monitoring to ensure its structural integrity and safety.
Located in a picturesque setting along Muddy Creek, Hannah Mahoney No. 2 plays a vital role in sustaining the region's water resources for agricultural use. With Liz Cheney (R) as the Congressional representative for the area, this dam serves as a testament to the importance of water management and conservation in the face of changing climates and growing water demands.
Year Completed |
1909 |
Dam Length |
590 |
Dam Height |
22 |
River Or Stream |
MUDDY CREEK |
Primary Dam Type |
Earth |
Surface Area |
11 |
Hydraulic Height |
18 |
Nid Storage |
107 |
Structural Height |
20 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
22 |
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.
Hannah Mahoney No. 2
Cherry Creek