Ashby Lake Dam Reservoir Report
Last Updated: February 5, 2026
Ashby Lake Dam, located in Rolla, Missouri, was completed in 1986 and serves primarily for recreation purposes.
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Summary
The dam, standing at a height of 30 feet with a storage capacity of 80 acre-feet, is classified as an Earth dam with a Buttress core type. It is situated on a tributary to Little Dry Fork, covering a surface area of 5 acres and draining a watershed area of 198 square miles.
Despite being privately owned and not regulated by the state, Ashby Lake Dam poses a low hazard potential with a condition assessment that is currently rated as "Not Rated." The dam has not been inspected recently, with no emergency action plan or inundation maps prepared. The risk assessment and management measures for the dam are also not available, highlighting the importance of monitoring and maintaining infrastructure to ensure safety and reliability for water resource and climate enthusiasts in the region.
Year Completed |
1986 |
Dam Height |
30 |
River Or Stream |
TRIB. TO LITTLE DRY FORK |
Surface Area |
5 |
Drainage Area |
198 |
Nid Storage |
80 |
Structural Height |
30 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
30 |
Seasonal Comparison
Hourly Weather Forecast
Nearby Streamflow Levels
Little Piney Creek At Newburg
|
68cfs |
Gasconade River At Jerome
|
579cfs |
Bourbeuse River Near High Gate
|
10cfs |
Meramec River At Cook Station
|
25cfs |
Meramec River Near Steelville
|
145cfs |
Big Piney Below Ft. Leonard Wood
|
172cfs |
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.
Ashby Lake Dam