E.Br So Fk Blackwater D-20 Reservoir Report

Last Updated: December 7, 2025

E.Br So Fk Blackwater D-20 in Sweet Springs, Missouri, is a local government-owned earth dam completed in 1958 with a primary purpose of flood risk reduction along the TR-E.BR.SO.FK.BLACKWATER river.


°F

°F

mph

Wind

%

Humidity

Summary

Standing at 26 feet in height and 620 feet in length, this dam has a storage capacity of 85 acre-feet and serves a drainage area of 294.4 square miles. Despite being classified as having a low hazard potential, it is noted to have a moderate risk level.

With a spillway width of 50 feet and a maximum discharge of 511 cubic feet per second, E.Br So Fk Blackwater D-20 plays a crucial role in managing potential flood events in the area. While the dam is currently rated as "Not Rated" in terms of condition assessment, its design consisting of stone core types and soil foundations showcases its resilience in flood risk reduction efforts. While it has not been updated in recent years, this structure remains an essential component of the local water resource management system in Johnson County, Missouri.

Year Completed

1958

Dam Length

620

Dam Height

26

River Or Stream

TR-E.BR.SO.FK.BLACKWATER

Primary Dam Type

Earth

Surface Area

8

Hydraulic Height

26

Drainage Area

294.4

Nid Storage

85

Structural Height

28

Outlet Gates

None

Hazard Potential

Low

Foundations

Soil

Nid Height

28
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.