Block Lake Dam Reservoir Report
Nearby: Broz Lake Dam Zander Lake Dam
Last Updated: December 14, 2025
Block Lake Dam, located in Montgomery, Missouri, is a privately owned Earth dam with a structural height of 33.2 feet and a storage capacity of 278 acre-feet.
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Summary
The dam, built with a buttress core type, serves a significant hazard potential and has not been rated for its condition. Despite being unregulated by the state, the dam's purpose and year of completion remain unspecified.
Situated within the St. Louis District, the Block Lake Dam stands at the coordinates 39.00792854 latitude and -91.57964083 longitude. With a normal storage capacity of 232 acre-feet and a drainage area of 2710 square miles, this dam plays a crucial role in managing water resources in the region. While its spillway type and inspection frequency are not specified, the dam continues to be a subject of interest for water resource and climate enthusiasts.
Although information about the dam's associated structures, last inspection date, and emergency action plan is unavailable, its location in Wellsville, Missouri, makes it a noteworthy landmark for those interested in water management and conservation efforts. With its potential for risk management measures and a lack of state regulatory oversight, Block Lake Dam serves as an intriguing case study for understanding the complexities of dam infrastructure in the face of changing climate patterns and water resource management challenges.
Dam Height |
33.2 |
Primary Dam Type |
Earth |
Surface Area |
21 |
Drainage Area |
2710 |
Nid Storage |
278 |
Structural Height |
33.2 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
33 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Missouri River At Hermann
|
27500cfs |
South Fork Salt River Above Santa Fe
|
28cfs |
Long Branch Near Santa Fe
|
15cfs |
Lick Creek At Perry
|
4cfs |
Cuivre River Near Troy
|
83cfs |
Spencer Cr. Bl Plum Cr. Nr Frankford
|
24cfs |
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.
Block Lake Dam