Herrold Lake Dam Reservoir Report
Nearby: Roy Lee Carmack Archie Smith Dam
Last Updated: December 19, 2025
Herrold Lake Dam, located in Grundy, Missouri, is a privately owned earth dam primarily used for recreational purposes.
°F
°F
mph
Wind
%
Humidity
Summary
Standing at a height of 25 feet, the dam has a storage capacity of 107 acre-feet and covers a surface area of 8 acres. With a drainage area of 70 square miles, the dam poses a high hazard potential and has not been rated for its condition assessment.
Although the dam has not been inspected recently and lacks certain safety measures such as an Emergency Action Plan (EAP), it remains a popular spot for water resource and climate enthusiasts due to its picturesque location near TR-NO Creek. Despite being privately owned, the dam receives no federal funding or regulatory oversight, raising concerns about its long-term maintenance and safety protocols. As climate change continues to impact water resources, the importance of maintaining and monitoring structures like Herrold Lake Dam becomes increasingly crucial.
As water resource and climate enthusiasts continue to advocate for sustainable practices, Herrold Lake Dam serves as a reminder of the need for proper infrastructure maintenance and emergency preparedness. With a lack of state regulation and inspection, the future of the dam remains uncertain, highlighting the importance of proactive measures to ensure the safety and integrity of water resources in the face of changing climate patterns.
Dam Height |
25 |
River Or Stream |
TR-NO CREEK |
Primary Dam Type |
Earth |
Surface Area |
8 |
Drainage Area |
70 |
Nid Storage |
107 |
Structural Height |
25 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Medicine Creek Near Laredo
|
6cfs |
Thompson River At Trenton
|
111cfs |
Locust Creek Near Linneus
|
35cfs |
Grand River At Chillicothe
|
361cfs |
Grand River Near Gallatin
|
61cfs |
East Fork Big Creek Near Bethany
|
2cfs |
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.
Herrold Lake Dam