Ascalmore Structure Y-17a-75 Dam Reservoir Report
Last Updated: December 5, 2025
The Ascalmore Structure Y-17a-75 Dam, also known as Mclellan Dam, is located in Tallahatchie, Mississippi, and was completed in 1963 by the USDA NRCS.
°F
°F
mph
Wind
%
Humidity
Summary
This earth dam, with a height of 29 feet, serves the primary purpose of flood risk reduction along the TR-Taylor Creek. The dam has a NID storage capacity of 316 acre-feet and is regulated by the Mississippi Department of Environmental Quality, ensuring that it meets state standards for safety and operation.
Despite its low hazard potential, the dam is rated as having a moderate risk level, indicating the need for ongoing monitoring and risk management measures. While the dam's condition is currently not rated, regular inspections and maintenance are crucial to ensuring its structural integrity and functionality. As a key component in flood risk reduction for the area, the Ascalmore Structure Y-17a-75 Dam plays a vital role in protecting the surrounding community and water resources from potential flooding events.
Year Completed |
1963 |
Dam Height |
29 |
River Or Stream |
TR- TAYLOR CREEK |
Primary Dam Type |
Earth |
Drainage Area |
0.73 |
Nid Storage |
316 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Yalobusha River At Grenada
|
3080cfs |
Batupan Bogue At Grenada
|
134cfs |
Tallahatchie River At Money
|
6080cfs |
Otoucalofa Creek Canal Nr Water Valley
|
25cfs |
Big Sunflower River Nr Merigold
|
703cfs |
Hotopha Creek Nr Batesville
|
13cfs |
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.
Ascalmore Structure Y-17a-75 Dam