Mc Masters Subwatershed 3907 Reservoir Report
Last Updated: January 5, 2026
Mc Masters Subwatershed 3907 is a vital water resource located in Monona, Iowa, specifically in the city of TURIN.
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Summary
This subwatershed is regulated by the Iowa Department of Natural Resources and is designed by the USDA NRCS, highlighting the collaboration between local government and federal agencies to ensure proper management and protection of the water resource. The dam in Mc Masters Subwatershed 3907 serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction, making it a crucial element in the local ecosystem.
Constructed in 1955, the Earth-type dam in Mc Masters Subwatershed 3907 has a height of 42 feet and a storage capacity of 127 acre-feet. The dam covers a surface area of 5 acres and drains a watershed area of 0.77 square miles, providing essential water storage and flood control capabilities for the surrounding area. Despite its low hazard potential, the dam's risk assessment is rated as moderate, signaling the need for ongoing risk management measures to ensure the safety and integrity of the structure.
With its strategic location along the TR-LITTLE SIOUX RIVER, Mc Masters Subwatershed 3907 plays a crucial role in water management and conservation efforts in the region. Its association with the Natural Resources Conservation Service and other federal agencies underscores the importance of collaboration in maintaining sustainable water resources for future generations.
Year Completed |
1955 |
Dam Height |
42 |
River Or Stream |
TR- LITTLE SIOUX RIVER |
Primary Dam Type |
Earth |
Surface Area |
5 |
Drainage Area |
0.77 |
Nid Storage |
127 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
42 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Maple River At Mapleton
|
323cfs |
West Fork Ditch At Hornick
|
80cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Missouri River At Decatur
|
15200cfs |
Soldier River At Pisgah
|
112cfs |
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 Masters Subwatershed 3907