Hammond Dam Reservoir Report
Nearby: Tioga Dam Taylor Run
Last Updated: December 8, 2025
Hammond Dam, also known as Hammond Lake, is a rockfill dam located in Tioga, Pennsylvania, completed in 1978 by the US Army Corps of Engineers.
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Summary
The primary purpose of this Federal-owned structure is flood risk reduction, with a normal storage capacity of 8,625 acre-feet and a maximum storage capacity of 136,936 acre-feet. The dam stands at a height of 122 feet and spans 6,450 feet along Crooked Creek, a tributary of the Tioga River.
While Hammond Dam plays a crucial role in reducing the risk of flooding to downstream communities, there are still potential hazards that could lead to significant flooding events. High-volume releases from the dam's spillway during severe storms could result in downstream flooding, impacting communities along the Tioga, Chemung, and North Branch Susquehanna Rivers. Although the dam is regularly inspected and monitored by the US Army Corps of Engineers, there are scenarios involving dam breaches that could have devastating consequences for surrounding areas.
To manage and reduce these risks, the US Army Corps of Engineers performs ongoing activities to ensure the integrity of Hammond Dam. This includes regular inspections, monitoring during high water events, and updating the Emergency Action Plan to respond to potential flood events effectively. By closely following rainfall forecasts and collaborating with federal, state, and local emergency managers, the US Army Corps of Engineers remains prepared to safeguard downstream communities and minimize the impact of any potential flooding incidents.
Year Completed |
1978 |
Dam Length |
6450 |
Dam Height |
122 |
River Or Stream |
CROOKED CREEK |
Primary Dam Type |
Rockfill |
Surface Area |
685 |
Hydraulic Height |
116 |
Drainage Area |
122 |
Nid Storage |
136936 |
Structural Height |
122 |
Hazard Potential |
High |
Foundations |
Rock and Soil |
Nid Height |
122 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Ives Run
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Tompkins River
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Hills Creek State Park
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Hammond Dam