Hainline Dam Reservoir Report
Nearby: Mount Ayr Game Area Dam #2 Smith Dam
Last Updated: December 14, 2025
Hainline Dam, located in Ringgold County, Iowa, was completed in 1996 and is primarily owned by a private entity.
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Summary
The dam, designed by NRCS, serves the purpose of fire protection, stock, or small fish pond. With a height of 31 feet and a length of 215 feet, the dam has a storage capacity of 46 acre-feet and covers a surface area of 2.8 acres.
The dam, built on TR-GRAND RIVER, is regulated by the Iowa DNR and is inspected, permitted, and enforced by the state. Despite its low hazard potential, the dam's risk assessment is moderate (3), indicating a need for risk management measures. The spillway type is uncontrolled, and the dam is constructed with earth materials on a soil foundation.
Water resource and climate enthusiasts interested in Hainline Dam will find its location, design, purpose, and regulatory information compelling. The dam not only serves practical functions but also presents opportunities for studying hydrological processes and risk management strategies in dam infrastructure. Its association with the Grand River and the environmental impact of the dam's construction add to its significance in the context of water resource management and climate adaptation.
Year Completed |
1996 |
Dam Length |
215 |
Dam Height |
31 |
River Or Stream |
TR- GRAND RIVER |
Primary Dam Type |
Earth |
Surface Area |
2.8 |
Drainage Area |
0.21 |
Nid Storage |
46 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
31 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Hainline Dam