Gnazzo Dam Reservoir Report
Last Updated: December 22, 2025
Gnazzo Dam, located in Daviess, Missouri, is a private structure built in 1980 for the primary purpose of creating a Fish and Wildlife Pond.
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Summary
The dam, made of earth and stone core, stands at a height of 27 feet and spans 420 feet in length. With a storage capacity of 52 acre-feet, the dam serves as a crucial resource for grade stabilization and recreation in the area.
Despite being classified with a low hazard potential, the dam is deemed to have a moderate risk due to its proximity to TR-DOG CREEK. With a max discharge of 145 cubic feet per second and an uncontrolled spillway, the structure ensures the safety of downstream areas during heavy rainfall events. The surrounding surface area of 2 acres and a drainage area of 51.2 square miles further highlight the importance of Gnazzo Dam in managing water resources in the region.
This vital infrastructure plays a significant role in supporting the local ecosystem and providing recreational opportunities for residents. As climate change continues to impact water resources, understanding and maintaining structures like Gnazzo Dam will be crucial in ensuring the sustainability and resilience of the surrounding environment.
Year Completed |
1980 |
Dam Length |
420 |
Dam Height |
27 |
River Or Stream |
TR-DOG CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
27 |
Drainage Area |
51.2 |
Nid Storage |
52 |
Structural Height |
27 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
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.
Gnazzo Dam