Lost Cr Pilot Watershed Dam G-1 Reservoir Report

Last Updated: December 18, 2025

Lost Cr Pilot Watershed Dam G-1, also known as Lost Creek Watershed Site G-1 Dam, is a flood risk reduction structure located in Lincoln County, Missouri.


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Summary

Completed in 1961, this earth dam stands at a height of 31 feet and has a hydraulic height of 31 feet, with a structural height of 33 feet. The dam has a storage capacity of 313 acre-feet and serves the primary purpose of flood risk reduction along Union Creek.

With a low hazard potential and a moderate risk assessment rating, Lost Cr Pilot Watershed Dam G-1 is currently not rated for its condition assessment. Despite not being state regulated, this dam plays a crucial role in managing water resources in the area. The dam's uncontrolled spillway, with a width of 100 feet, can handle a maximum discharge of 1570 cubic feet per second, serving as an essential component in flood control efforts. While the dam does not have outlet gates, its stone core and soil foundation contribute to its structural integrity.

Located in the Kansas City District, Lost Cr Pilot Watershed Dam G-1 is a key infrastructure for local government in Elsberry, Missouri. Even though it is not inspected regularly, this dam continues to provide vital flood protection for the surrounding area. As water resource and climate enthusiasts, understanding the importance of structures like Lost Cr Pilot Watershed Dam G-1 can help in appreciating the efforts made to manage and mitigate the impacts of extreme weather events on our communities.

Year Completed

1961

Dam Length

1170

Dam Height

31

River Or Stream

UNION CREEK

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

31

Drainage Area

64

Nid Storage

313

Structural Height

33

Outlet Gates

None

Hazard Potential

Low

Foundations

Soil

Nid Height

33
       
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.