Gs Dd No 4-20c Reservoir Report
Nearby: Dd No 4-17 (Bruning) Gs Dd No 9-4
Last Updated: December 13, 2025
Gs Dd No 4-20c is a local government-owned earth dam located in Brown, Kansas, along Roy's Creek-TR.
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Summary
Constructed in 1989 by King & Associates, this dam serves the primary purpose of flood risk reduction in the area. With a height of 28 feet and a length of 510 feet, the dam has a NID storage capacity of 96.51 acre-feet, providing crucial protection for the surrounding community.
Although the hazard potential of Gs Dd No 4-20c is rated as low, the risk assessment indicates a moderate level of risk (3). Despite not being regulated or inspected by the state, this dam plays a vital role in mitigating potential flood damage in the region. With a spillway width of 71 feet and no outlet gates, the dam is designed to handle uncontrolled overflow events while maintaining structural integrity.
Even though the condition of Gs Dd No 4-20c is not rated, its risk management measures and emergency action plans are not specified. As a key component in the local flood risk reduction strategy, this dam exemplifies the importance of proactive infrastructure in safeguarding water resources and communities against the impacts of climate change.
Year Completed |
1989 |
Dam Length |
510 |
Dam Height |
28 |
River Or Stream |
ROY'S CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
3.98 |
Drainage Area |
0.25 |
Nid Storage |
96.51 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Missouri River At Rulo
|
28600cfs |
Big Nemaha River At Falls City
|
310cfs |
Delaware R Nr Muscotah
|
37cfs |
Nodaway River Near Graham
|
134cfs |
Missouri River At St. Joseph
|
27300cfs |
Stranger C Nr Potter
|
199cfs |
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.
Gs Dd No 4-20c