Grace And Hawk No 1 Reservoir Report
Last Updated: December 16, 2025
Grace and Hawk No 1, located in Alanthus, Missouri, is a privately owned earth dam serving the primary purpose of grade stabilization along the TR-West Fork Grand River.
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Summary
Built in 1992 by the Rock Island District of the US Army Corps of Engineers, this 27-foot high structure spans 460 feet and has a storage capacity of 29 acre-feet. Despite its low hazard potential, the dam is considered to have a moderate risk level, prompting the need for ongoing risk management measures.
With a drainage area of 102.4 square miles, Grace and Hawk No 1 plays a crucial role in regulating water flow and protecting the surrounding area from potential flooding. The dam features an uncontrolled spillway with a width of 35 feet to manage excess water during periods of high discharge. Although the dam has not been inspected recently and is currently rated as "not assessed," its design and construction meet operational standards for grade stabilization purposes.
While there are no associated structures or regulatory agencies overseeing its operation, Grace and Hawk No 1 remains an essential component of the local water resource infrastructure in Worth County. As climate change continues to impact precipitation patterns and water levels in the region, the proper maintenance and monitoring of this dam are essential to ensuring its effectiveness in mitigating flood risks and safeguarding the community against potential hazards.
Year Completed |
1992 |
Dam Length |
460 |
Dam Height |
27 |
River Or Stream |
TR-WEST FORK GRAND RIVER |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
27 |
Drainage Area |
102.4 |
Nid Storage |
29 |
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.
Grace And Hawk No 1