So Fork Blackwater Wtrshd Site E-29 Reservoir Report
Last Updated: December 6, 2025
So Fork Blackwater Watershed Site E-29 is a local government-owned flood risk reduction structure located in Holden, Missouri.
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Summary
Constructed in 1980, this earth dam stands at a height of 27 feet and has a length of 1000 feet, with a storage capacity of 1954 acre-feet. Situated on E Pin Oak Creek in Johnson County, this structure helps mitigate flood risks for the surrounding area by providing storage for excess water during heavy rainfall events.
With a low hazard potential and a current condition assessment of "Not Rated," this dam serves as a crucial piece of infrastructure in the region's water resource management system. Despite not being state regulated or inspected, the dam's construction and operation fall under the jurisdiction of the Kansas City District of the US Army Corps of Engineers. With a drainage area of 774 square miles and a maximum discharge capacity of 4813 cubic feet per second, this structure plays a vital role in protecting downstream communities from the impacts of flooding.
Although the dam has not been assessed for emergency action planning or risk assessment, its strategic location and design make it an essential component in the overall flood risk reduction strategy for the region. The site's proximity to the South Fork Blackwater River and its capacity to store water during high-flow events make it a valuable asset for safeguarding both local communities and the surrounding ecosystem from the impacts of extreme weather events and climate variability.
Year Completed |
1980 |
Dam Length |
1000 |
Dam Height |
27 |
River Or Stream |
E PIN OAK CREEK |
Surface Area |
13 |
Drainage Area |
774 |
Nid Storage |
1954 |
Structural Height |
27 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
27 |
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.
So Fork Blackwater Wtrshd Site E-29