Tiefenthaler Dam Reservoir Report
Last Updated: December 13, 2025
Tiefenthaler Dam, located in Crawford County, Iowa, was completed in 1976 by the USDA NRCS and serves multiple purposes including fire protection, stock, and small fish pond management.
°F
°F
mph
Wind
%
Humidity
Summary
This private earth dam stands at a height of 29 feet and spans 370 feet in length, with a storage capacity of 59 acre-feet and a surface area of 2.6 acres. Situated on TR-Coon Creek, the dam is regulated by the Iowa DNR and maintains a low hazard potential with a moderate risk assessment rating.
Despite its uncontrolled spillway type, Tiefenthaler Dam has not been rated for its condition assessment, and no emergency action plan has been prepared or updated. With a risk management measure in place, the dam's risk assessment remains moderate. Although there are no associated structures or outlet gates, the dam's primary purpose of providing essential water resources for fire protection and livestock indicates its significance in the local community. With its picturesque setting and vital role in water resource management, Tiefenthaler Dam stands as a testament to the importance of sustainable infrastructure for climate resilience and conservation efforts in Iowa.
Year Completed |
1976 |
Dam Length |
370 |
Dam Height |
29 |
River Or Stream |
TR-COON CREEK |
Primary Dam Type |
Earth |
Surface Area |
2.6 |
Drainage Area |
0.27 |
Nid Storage |
59 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Maple River At Mapleton
|
323cfs |
North Raccoon River Near Sac City
|
312cfs |
Soldier River At Pisgah
|
112cfs |
Boyer River At Logan
|
417cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
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.
Tiefenthaler Dam