Mc Donald Subwatershed Site 5-2290 Reservoir Report
Last Updated: December 14, 2025
Mc Donald Subwatershed Site 5-2290, located in Mapleton, Iowa, is a vital water resource managed by the local government for multiple purposes including fire protection, stock, small fish pond, and flood risk reduction.
°F
°F
mph
Wind
%
Humidity
Summary
This earth-type dam, completed in 1959, stands at a height of 33 feet and spans 628 feet in length, with a storage capacity of 27 acre-feet. Situated on the TR-Little Sioux River, this structure plays a crucial role in regulating water flow and protecting the surrounding area from potential hazards.
Managed by the Iowa Department of Natural Resources, this site is subject to state regulation, permitting, inspection, and enforcement. Despite its low hazard potential and moderate risk assessment, the condition of the dam has not been rated. It is important to note that the last inspection took place in November 1963, indicating a need for updated assessments and risk management measures to ensure the continued safety and functionality of the structure. With its strategic location and significance in the region's water management system, Mc Donald Subwatershed Site 5-2290 serves as a critical asset for both the local community and the environment.
Year Completed |
1959 |
Dam Length |
628 |
Dam Height |
33 |
River Or Stream |
TR-LITTLE SIOUX RIVER |
Primary Dam Type |
Earth |
Surface Area |
2.1 |
Drainage Area |
0.26 |
Nid Storage |
27 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
33 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
West Fork Ditch At Hornick
|
80cfs |
Maple River At Mapleton
|
323cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Little Sioux River At Correctionville
|
327cfs |
Missouri River At Decatur
|
14900cfs |
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.
Mc Donald Subwatershed Site 5-2290