Rock Creek Branch Dam Reservoir Report
Last Updated: December 7, 2025
Rock Creek Branch Dam, located in Hannibal, Missouri, serves as a vital structure for fish and wildlife conservation, fire protection, grade stabilization, and recreational activities.
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Summary
Completed in 1974, this earth dam stands at a height of 25 feet with a hydraulic height of 24 feet and a structural height of 26 feet. The dam stretches out to a length of 550 feet and has a storage capacity of 87 acre-feet, providing essential water resources for the surrounding area.
With a spillway width of 42 feet and a significant hazard potential, Rock Creek Branch Dam is designed to handle a maximum discharge of 981 cubic feet per second. Despite not being state-regulated or inspected, the dam poses a moderate risk level, with a condition assessment of "Not Rated". While there are no outlet gates or associated structures, the dam's primary purpose of supporting fish and wildlife habitats underscores its importance in preserving the local ecosystem and water resources.
As a private-owned dam in Knox County, Missouri, Rock Creek Branch Dam stands as a testament to the intersection of water resource management and environmental conservation. With its strategic location on TR-Rock Creek and its critical role in maintaining water levels for various purposes, this dam serves as a valuable asset for both the community and the surrounding wildlife.
Year Completed |
1974 |
Dam Length |
550 |
Dam Height |
25 |
River Or Stream |
TR-ROCK CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
24 |
Drainage Area |
44.8 |
Nid Storage |
87 |
Structural Height |
26 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Rock Creek Branch Dam