Mccallum Dam Reservoir Report
Last Updated: January 12, 2026
McCallum Dam, located in Linn, Missouri, was completed in 1999 by the USDA NRCS and serves multiple purposes including fire protection, stock watering, and a small fish pond.
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Summary
This privately-owned earth dam stands at a height of 28 feet with a structural height of 33 feet and a length of 410 feet, creating a reservoir with a storage capacity of 47 acre-feet and a surface area of 10 acres. The dam, situated on TR-West Yellow Creek, is classified as having a low hazard potential and a moderate risk assessment.
Despite being privately owned, McCallum Dam is not regulated or inspected by the state of Missouri. It has an uncontrolled spillway with a width of 10 feet and no outlet gates. The dam poses a moderate risk, with a risk assessment score of 3 out of 5, prompting the need for risk management measures to be implemented. While the dam is not under the jurisdiction of the state, its completion was funded by the federal government and it falls under the oversight of the Natural Resources Conservation Service. For water resource and climate enthusiasts, McCallum Dam presents an intriguing case study in dam construction and management in the heart of the Midwest.
Year Completed |
1999 |
Dam Length |
410 |
Dam Height |
28 |
River Or Stream |
TR-WEST YELLOW CREEK |
Primary Dam Type |
Earth |
Surface Area |
10 |
Hydraulic Height |
27 |
Drainage Area |
121.6 |
Nid Storage |
47 |
Structural Height |
33 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
33 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Locust Creek Near Linneus
|
113cfs |
Grand River Near Sumner
|
1540cfs |
Mussel Fork Near Musselfork
|
39cfs |
Chariton River Near Prairie Hill
|
755cfs |
Medicine Creek Near Laredo
|
63cfs |
East Fork Little Chariton R. Nr Macon
|
12cfs |
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.
Mccallum Dam