Woodward Glen Subwatershed Site 5800 Reservoir Report
Last Updated: December 15, 2025
Woodward Glen Subwatershed Site 5800, located in Monona, Iowa, is a crucial water resource managed by the USDA NRCS.
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Summary
This site serves multiple purposes including fire protection, stock, or small fish pond, as well as flood risk reduction. The earth dam, with a height of 31 feet and a storage capacity of 198 acre-feet, was completed in 1958 to provide essential water management for the Little Sioux River.
The dam at Woodward Glen Subwatershed Site 5800 plays a vital role in mitigating flood risks in the area, with a low hazard potential and a moderate risk assessment rating. Although the condition assessment is not rated, the dam is under state regulation, inspection, and enforcement by the Iowa DNR, ensuring its continued functionality and safety. The site's location in the Turin city area, along with its purpose and design, highlights its importance in water resource management and climate resilience efforts.
With a surface area of 10 acres and a drainage area of 1 acre, Woodward Glen Subwatershed Site 5800 is a significant water resource for the region. Despite its uncontrolled spillway type, the dam has a storage capacity of 198 acre-feet and a normal storage level of 76 acre-feet, providing essential water supply for various needs. As water resource and climate enthusiasts, understanding and monitoring sites like Woodward Glen Subwatershed Site 5800 are crucial for effective water management and climate adaptation strategies in the face of changing environmental conditions.
Year Completed |
1958 |
Dam Height |
31 |
River Or Stream |
TR- LITTLE SIOUX RIVER |
Primary Dam Type |
Earth |
Surface Area |
10 |
Drainage Area |
1 |
Nid Storage |
198 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
31 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
West Fork Ditch At Hornick
|
80cfs |
Maple River At Mapleton
|
323cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Little Sioux River Near Turin
|
1040cfs |
Missouri River At Decatur
|
14800cfs |
Little Sioux River At Correctionville
|
327cfs |
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.
Woodward Glen Subwatershed Site 5800