Gs Dd No 120 Reservoir Report
Nearby: Dd No 115 (Bailey) Gs Dd No 24
Last Updated: December 13, 2025
Gs Dd No 120, located in Brown County, Kansas, is a local government-owned earth dam constructed in 1994 for flood risk reduction along Pony Creek.
°F
°F
mph
Wind
%
Humidity
Summary
With a height of 27.6 feet and a length of 600 feet, this dam has a storage capacity of 54.5 acre-feet and serves the primary purpose of debris control and flood risk reduction. Despite its low hazard potential, the dam has a moderate risk assessment rating of 3, indicating a need for ongoing monitoring and maintenance.
Managed by the Kansas City District of the US Army Corps of Engineers, Gs Dd No 120 has not been subject to state regulation, permitting, inspection, or enforcement. The dam features an uncontrolled spillway with a width of 20 feet and has no outlet gates or associated structures. While the condition assessment is currently listed as 'Not Rated', the risk management measures and emergency action plan status remain unspecified, highlighting the importance of ensuring the dam's resilience in the face of potential hazards and emergencies.
For water resource and climate enthusiasts, Gs Dd No 120 presents an intriguing case study in dam infrastructure and risk management. As a vital component of flood risk reduction efforts in the area, the dam's design, construction, and maintenance practices offer valuable insights into sustainable water resource management. With its location along Pony Creek and its modest storage capacity, Gs Dd No 120 underscores the critical role of infrastructure in mitigating the impacts of extreme weather events and safeguarding communities against flooding.
Year Completed |
1994 |
Dam Length |
600 |
Dam Height |
27.6 |
River Or Stream |
PONY CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
3.1 |
Drainage Area |
0.19 |
Nid Storage |
54.5 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Big Nemaha River At Falls City
|
310cfs |
North Fork Big Nemaha River At Humboldt
|
67cfs |
Missouri River At Rulo
|
26600cfs |
Turkey C Nr Seneca
|
14cfs |
Little Nemaha River At Auburn
|
82cfs |
Tarkio River At Fairfax Mo
|
55cfs |
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 |
|---|---|---|
Pony Creek Lake
|
||
Sabetha Lake
|
||
Verdon Lake State Rec Area
|
Gs Dd No 120