Crawford Co Roadgrade Dam 34-84-39 Reservoir Report
Last Updated: December 15, 2025
Crawford CO Roadgrade Dam 34-84-39, located in Denison, Iowa, is a local government-owned structure designed by NRCS with a primary purpose of grade stabilization along TR- BUFFALO CREEK.
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Summary
Completed in 2002, this earth dam stands at a height of 41 feet and has a length of 415 feet, with a storage capacity of 44 acre-feet and a surface area of 2.5 acres. The dam is regulated by the Iowa DNR and undergoes state permitting, inspection, and enforcement.
With a low hazard potential and a moderate risk assessment rating, Crawford CO Roadgrade Dam 34-84-39 plays a crucial role in managing water resources in Crawford County. While the dam is currently in a not rated condition, it is subject to state jurisdiction and regulations to ensure its safety and functionality. As a part of the Grade Stabilization program, this dam helps to control erosion and protect the surrounding areas from potential flooding, demonstrating its importance in mitigating the impacts of climate change on local water systems.
Overall, Crawford CO Roadgrade Dam 34-84-39 serves as a key infrastructure for water resource management in Iowa, contributing to the conservation of water quality and the prevention of soil erosion. As a local government-owned facility, this dam plays a vital role in maintaining the stability of TR- BUFFALO CREEK and ensuring the safety of nearby communities. With proper state oversight and maintenance, this earth dam continues to fulfill its intended purpose and support the sustainable management of water resources in the region.
Year Completed |
2002 |
Dam Length |
415 |
Dam Height |
41 |
River Or Stream |
TR- BUFFALO CREEK |
Primary Dam Type |
Earth |
Surface Area |
2.5 |
Drainage Area |
0.31 |
Nid Storage |
44 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
41 |
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 |
Monona-Harrison Ditch Near Turin
|
158cfs |
Soldier River At Pisgah
|
112cfs |
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.
Crawford Co Roadgrade Dam 34-84-39