Yellowsmoke Watershed Site D-2 Reservoir Report
Last Updated: December 13, 2025
Yellowsmoke Watershed Site D-2, located in Crawford County, Iowa, is a privately owned earth dam completed in 1989 for fire protection, stock, and small fish pond purposes.
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Summary
With a dam height of 25 feet and a length of 410 feet, this structure has a storage capacity of 67 acre-feet and serves a drainage area of 0.66 square miles. Despite being classified as low hazard potential and having a moderate risk assessment rating, the dam's condition assessment is currently marked as "Not Rated" with no recent inspection data available.
Managed by the Iowa Department of Natural Resources, Yellowsmoke Watershed Site D-2 is designed to control debris and provide essential water resources for the local community. The dam's spillway type is uncontrolled, and it has a surface area of 3 acres. Located along the TR- East Boyer River, the dam is essential for maintaining water levels and protecting against potential flooding events. While the dam's overall risk is considered moderate, the lack of recent inspection data raises concerns about its long-term safety and maintenance requirements.
As an integral part of the local water resource infrastructure, Yellowsmoke Watershed Site D-2 plays a crucial role in managing water flow and providing essential services to the community. With its primary purpose focused on fire protection and water storage, this dam serves as a vital asset for ensuring the safety and well-being of residents in the surrounding area. Monitoring and regular maintenance are essential to uphold the dam's integrity and safeguard against potential risks associated with its operation.
Year Completed |
1989 |
Dam Length |
410 |
Dam Height |
25 |
River Or Stream |
TR- EAST BOYER RIVER |
Primary Dam Type |
Earth |
Surface Area |
3 |
Drainage Area |
0.66 |
Nid Storage |
67 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Maple River At Mapleton
|
323cfs |
North Raccoon River Near Sac City
|
312cfs |
Little Sioux River Near Turin
|
1040cfs |
Soldier River At Pisgah
|
112cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Boyer River At Logan
|
417cfs |
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.
Yellowsmoke Watershed Site D-2