Janice Rosier Lake Dam Reservoir Report

Last Updated: December 13, 2025

Janice Rosier Lake Dam, located in Holt, Missouri, was completed in 2002 by the Natural Resources Conservation Service with a primary purpose of grade stabilization along TR-Squaw Creek.


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Summary

This earth dam stands at a height of 31 feet and spans 278 feet in length, with a storage capacity of 17 acre-feet and a drainage area of 38.4 square miles. Despite being privately owned and not regulated by the state, the dam has a low hazard potential and a moderate risk assessment rating.

The dam features an uncontrolled spillway with a width of 26 feet and has not been rated for its current condition. The last inspection in 2004 revealed no significant issues, but the inspection frequency is listed as 0, indicating a potential lapse in monitoring. While it lacks outlet gates and emergency action plans, the dam serves as a critical infrastructure for managing water resources in the area and protecting against potential flooding events. Overall, Janice Rosier Lake Dam presents an intriguing case study for water resource and climate enthusiasts interested in the intersection of dam safety and environmental conservation efforts.

Year Completed

2002

Dam Length

278

Dam Height

31

River Or Stream

TR-SQUAW CREEK

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

31

Drainage Area

38.4

Nid Storage

17

Structural Height

27

Outlet Gates

None

Hazard Potential

Low

Foundations

Soil

Nid Height

31
       
Seasonal Comparison

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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.