Lewis Lake Dam Reservoir Report
Nearby: Epperson Dam Vandalia Lake Dam
Last Updated: January 11, 2026
Lewis Lake Dam in Missouri, completed in 1976, stands as an essential earth dam for irrigation purposes on the TR-CLIFTY FORK river.
°F
°F
mph
Wind
%
Humidity
Summary
This privately owned structure, with a structural height of 19 feet and a storage capacity of 120 acre-feet, serves the surrounding area with a normal storage of 77 acre-feet. With a low hazard potential and moderate risk assessment, the dam's spillway type is uncontrolled, with a width of 12 feet.
Located in Pike County, Missouri, the Lewis Lake Dam is part of the St. Louis District and falls under the jurisdiction of the state. Despite not being regulated or inspected by the state, the dam has an overall condition assessment of "Not Rated." While it currently lacks an emergency action plan and inundation maps, the risk management measures are moderate. This dam is a crucial element for the local irrigation system and contributes to water resource management in the region.
For water resource and climate enthusiasts, Lewis Lake Dam offers a fascinating glimpse into the intersection of infrastructure, environment, and water management. With its unique design as an earth dam with a stone core foundation, this structure plays a vital role in supporting agricultural activities in the area. As discussions on water security and climate resilience continue to evolve, Lewis Lake Dam stands as a tangible example of how human-made structures can coexist with natural ecosystems to ensure sustainable water use for future generations.
Year Completed |
1976 |
Dam Length |
820 |
Dam Height |
18 |
River Or Stream |
TR-CLIFTY FORK |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
17 |
Drainage Area |
107 |
Nid Storage |
120 |
Structural Height |
19 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
19 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Spencer Cr. Bl Plum Cr. Nr Frankford
|
15cfs |
Salt River Near New London
|
76cfs |
Salt River Near Center
|
57cfs |
Lick Creek At Perry
|
1cfs |
Bear Creek At Hannibal
|
5cfs |
Long Branch Near Santa Fe
|
40cfs |
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.
Lewis Lake Dam