Summary
Built in 2004 by designer Hugh Lowham, this structure serves primarily for irrigation purposes, with additional benefits for fire protection, stock, and small fish pond. The dam stands at 30 feet tall with a hydraulic height of 22 feet, offering a maximum storage capacity of 38 acre-feet and covering a surface area of 2.1 acres. Despite its low hazard potential and fair condition assessment, Margaret No.2 undergoes regular inspections every 5 years to ensure its structural integrity and compliance with state regulations.
Managed by the Wyoming State Engineer's Office and Department of Environmental Quality, Margaret No.2 is subject to state permitting, inspection, and enforcement protocols to safeguard its operation and surrounding environment. The dam features an uncontrolled spillway with a width of 60 feet and is equipped with a single valve outlet gate for water discharge control. With a moderate risk assessment rating of 3, the structure is deemed to have potential risks that require ongoing monitoring and risk management measures. Although located in a remote area off County Road, this dam plays a crucial role in supporting local agriculture and water resource management in the region.
In the event of an emergency, Margaret No.2 has designated emergency contacts for swift response, although the details of the Emergency Action Plan (EAP) are currently unspecified. The structure's overall risk management approach and adherence to guidelines remain undisclosed, highlighting the need for further assessment and preparation for potential inundation scenarios. As a key irrigation asset in the Omaha District, Margaret No.2 stands as a vital component of the regional water infrastructure, showcasing the intersection of human intervention with natural water systems for sustainable resource utilization and climate resilience.
Year Completed |
2004 |
Dam Length |
189 |
Dam Height |
29 |
River Or Stream |
JENNIE DRAW |
Primary Dam Type |
Earth |
Surface Area |
2.1 |
Hydraulic Height |
22 |
Drainage Area |
0.36 |
Nid Storage |
38 |
Structural Height |
30 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wild Horse Creek Near Arvada
|
0cfs |
Powder River At Arvada
|
243cfs |
Clear Creek Near Arvada
|
256cfs |
Piney Creek At Kearny
|
113cfs |
Clear Creek Near Buffalo
|
17cfs |
Powder River At Moorhead Mt
|
60cfs |
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.
Margaret No.2