Tillatoba Creek Ws Str Y-17b-04 Dam Reservoir Report
Last Updated: December 5, 2025
Tillatoba Creek WS Str Y-17b-04 Dam, also known as The Hartley Dam, is a crucial piece of infrastructure in Yalobusha, Mississippi, designed by the USDA NRCS to serve as a flood risk reduction measure along Simmons Creek.
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Summary
Completed in 1981, this earth-type dam stands at a height of 28 feet and stretches 1008 feet in length, with a storage capacity of 834 acre-feet. Despite its importance in mitigating flood risks, the dam's condition assessment indicates poor structural health and a high hazard potential, warranting regular inspections to ensure public safety.
Managed by the local government and regulated by the Mississippi Department of Environmental Quality, Tillatoba Creek WS Str Y-17b-04 Dam plays a vital role in protecting the surrounding area from potential inundation. Although the dam lacks outlet gates, its uncontrolled spillway aids in managing excess water during periods of high discharge. The dam's location in Tillatoba, upstream from the city, underscores its significance in safeguarding residents and property from flood-related risks, making it a key asset in the region's water resource management infrastructure.
Despite its age and condition assessment, Tillatoba Creek WS Str Y-17b-04 Dam continues to serve its primary purpose of flood risk reduction, highlighting the crucial role of such structures in maintaining water security in the face of changing climate patterns. As climate enthusiasts and water resource managers monitor the dam's risk assessment and management measures, ongoing efforts to address its structural health and hazard potential are essential to ensure the long-term resilience of this important piece of infrastructure in Yalobusha County.
Year Completed |
1981 |
Dam Length |
1008 |
Dam Height |
28 |
River Or Stream |
SIMMONS CREEK |
Primary Dam Type |
Earth |
Surface Area |
31 |
Drainage Area |
1.75 |
Nid Storage |
834 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Yalobusha River At Grenada
|
3080cfs |
Batupan Bogue At Grenada
|
134cfs |
Otoucalofa Creek Canal Nr Water Valley
|
25cfs |
Tallahatchie River At Money
|
6080cfs |
Hotopha Creek Nr Batesville
|
13cfs |
Yocona River Nr Oxford
|
96cfs |
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.
Tillatoba Creek Ws Str Y-17b-04 Dam