Manor Dam Reservoir Report
Last Updated: December 6, 2025
Manor Dam, located in Keosauqua, Iowa, is a privately owned structure managed by the Iowa Department of Natural Resources.
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Summary
Built in 1997 by the NRCS, this earth dam stands at a height of 26 feet and spans 490 feet along TR- Lick Creek. Its primary purpose is for fire protection, stock, or as a small fish pond, with a maximum storage capacity of 150 acre-feet.
With a low hazard potential and a moderate risk assessment rating, Manor Dam is not currently rated for its condition. It has not undergone recent inspections or assessments, but remains under state regulation and jurisdiction for permitting, inspection, and enforcement. Despite its straightforward design and function, the dam poses a moderate risk due to its location and potential impact on the surrounding area in the event of a failure.
Water resource and climate enthusiasts interested in Manor Dam can find it in a picturesque setting in Jefferson County, Iowa. While the dam serves practical purposes for the local community, its condition and risk assessment should be closely monitored to ensure the safety and sustainability of its operations. As it stands, Manor Dam remains a valuable asset for fire protection and recreational use in the region.
Year Completed |
1997 |
Dam Length |
490 |
Dam Height |
26 |
River Or Stream |
TR- LICK CREEK |
Primary Dam Type |
Earth |
Surface Area |
9.9 |
Drainage Area |
0.42 |
Nid Storage |
150 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Des Moines River At Keosauqua
|
1800cfs |
Cedar Creek Near Oakland Mills
|
10cfs |
Des Moines River At Ottumwa
|
1090cfs |
Fox River At Bloomfield
|
7cfs |
Big Creek Near Mt. Pleasant
|
0cfs |
North Skunk River Near Sigourney
|
97cfs |
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.
Manor Dam