Langenfeld - Heiden Dam Reservoir Report
Nearby: Murchland Dam Tiefenthaler Dam
Last Updated: December 14, 2025
Langenfeld - Heiden Dam, located in Denison, Iowa, is a privately-owned earth dam designed by the USDA NRCS and completed in 2000.
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Summary
The dam serves the primary purpose of grade stabilization along the Tr- East Boyer River, with a height of 44 feet and a length of 527 feet. It has a storage capacity of 28 acre-feet and covers a surface area of 2.6 acres, with a drainage area of 0.12 square miles.
Despite being classified as having a low hazard potential, Langenfeld - Heiden Dam is rated as having a moderate risk level. The dam features an uncontrolled spillway with a width of 1 foot and is not currently regulated, inspected, or enforced by state agencies. While its condition assessment is listed as "Not Rated," the dam has not undergone any recent modifications or inspections. Overall, Langenfeld - Heiden Dam presents an opportunity for water resource and climate enthusiasts to explore the intersection of infrastructure, conservation, and risk management in the context of sustainable water resource development.
As one of the key structures in the area for grade stabilization, Langenfeld - Heiden Dam highlights the importance of proper dam design, construction, and maintenance in managing water resources effectively. Its location within the Rock Island District and proximity to the East Boyer River underscores the critical role of dams in maintaining water quality, preventing erosion, and regulating water flow. With its unique characteristics and moderate risk level, the dam offers a valuable case study for enthusiasts interested in understanding the complexities of dam management and the challenges of balancing conservation efforts with infrastructure development in a changing climate.
Year Completed |
2000 |
Dam Length |
527 |
Dam Height |
44 |
River Or Stream |
Tr- East Boyer River |
Primary Dam Type |
Earth |
Surface Area |
2.6 |
Drainage Area |
0.12 |
Nid Storage |
28 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
44 |
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.
Langenfeld - Heiden Dam