Grisham Lake Dam Reservoir Report
Last Updated: December 7, 2025
Grisham Lake Dam, located in Howell, Missouri, was completed in 1964 with a primary purpose of recreation.
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Summary
This private-owned earth dam stands at a height of 25 feet and has a storage capacity of 201 acre-feet. Despite not being regulated by the state, the dam is considered to have a high hazard potential, although its condition assessment remains unrated as of now.
The dam overlooks TR-HOWELL CREEK and serves as a popular spot for outdoor enthusiasts in the area. With a surface area of 15 acres and a drainage area of 157 square miles, Grisham Lake Dam provides a picturesque setting for recreational activities. Although it lacks certain safety features like spillway width and outlet gates, the dam continues to be a focal point for water resource and climate enthusiasts in the region.
As the last inspection was conducted back in 1980, there is a need for updated risk assessments and emergency action plans to ensure the safety and integrity of Grisham Lake Dam. With its idyllic location and historical significance, this dam serves as a reminder of the importance of proper maintenance and oversight in managing water resources for future generations to enjoy.
Year Completed |
1964 |
Dam Height |
25 |
River Or Stream |
TR-HOWELL CREEK |
Primary Dam Type |
Earth |
Surface Area |
15 |
Drainage Area |
157 |
Nid Storage |
201 |
Structural Height |
25 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
25 |
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.
Grisham Lake Dam