Lost Cr Pilot Watershed Dam E-7 Reservoir Report

Last Updated: December 18, 2025

Lost Cr Pilot Watershed Dam E-7, located in Lincoln County, Missouri, was completed in 1959 with the primary purpose of flood risk reduction.


°F

°F

mph

Wind

%

Humidity

Summary

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. It has a storage capacity of 269 acre-feet and serves a drainage area of 256 square miles. The dam, situated on TR-LOST CREEK, has a spillway width of 150 feet and a maximum discharge of 6100 cubic feet per second.

Despite being owned by a local government entity, the dam is not state regulated or permitted, and does not fall under state jurisdiction for inspection or enforcement. With a significant hazard potential and a moderate risk assessment rating, Lost Cr Pilot Watershed Dam E-7 poses a potential risk to the surrounding area in case of a failure. The condition of the dam is currently not rated, and it lacks a formal Emergency Action Plan (EAP) or inundation maps for emergency preparedness.

Water resource and climate enthusiasts interested in the infrastructure and management of dams will find Lost Cr Pilot Watershed Dam E-7 to be a notable structure in the region. With its historical significance in flood risk reduction and the potential risks associated with its current condition, there is an opportunity for further research and assessment to ensure the safety and resilience of this crucial water resource facility.

Year Completed

1959

Dam Length

960

Dam Height

31

River Or Stream

TR-LOST CREEK

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

31

Drainage Area

256

Nid Storage

269

Structural Height

33

Outlet Gates

None

Hazard Potential

Significant

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.