Lum Hollow Subwatershed 9c-3295 Reservoir Report
Last Updated: December 13, 2025
Located in Woodbury County, Iowa, the Lum Hollow Subwatershed 9c-3295 is a local government-owned Earth dam completed in 1959 by the USDA NRCS.
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Summary
With a primary purpose of providing fire protection, stock, or small fish pond, this dam also serves the additional purposes of flood risk reduction. The dam has a height of 35 feet, a length of 500 feet, and a storage capacity of 75 acre-feet, making it a vital resource for the surrounding area.
Situated on TR-Moose Creek, this dam is regulated by the Iowa DNR and is subject to state permitting, inspection, and enforcement. With a low hazard potential and a moderate risk assessment rating of 3, the Lum Hollow Subwatershed 9c-3295 plays a crucial role in managing water resources in the region. While the condition of the dam is currently not rated, its strategic location and purpose make it a valuable asset for both water management and environmental conservation efforts in the area.
Despite its relatively small drainage area of 0.34 square miles, the dam's surface area of 2.1 acres and normal storage capacity of 20 acre-feet make it an important contributor to the overall water management strategy in the region. With a focus on fire protection, stock, and flood risk reduction, the Lum Hollow Subwatershed 9c-3295 serves as a key element in maintaining a sustainable and resilient water resource system in Woodbury County, Iowa.
Year Completed |
1959 |
Dam Length |
500 |
Dam Height |
35 |
River Or Stream |
TR-MOOSE CREEK |
Primary Dam Type |
Earth |
Surface Area |
2.1 |
Drainage Area |
0.34 |
Nid Storage |
75 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
West Fork Ditch At Hornick
|
80cfs |
Maple River At Mapleton
|
323cfs |
Little Sioux River At Correctionville
|
327cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Missouri River At Decatur
|
15500cfs |
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.
Lum Hollow Subwatershed 9c-3295