Castle Lake Dam Reservoir Report

Last Updated: December 11, 2025

Castle Lake Dam in Missouri is a privately owned structure built for irrigation purposes on Sally Branch.


°F

°F

mph

Wind

%

Humidity

Summary

Completed in 1977, this earth dam stands at a height of 20 feet and stretches 1000 feet in length, with a storage capacity of 53 acre-feet. Despite being unregulated and uninspected by state agencies, the dam has a low hazard potential and a moderate risk assessment rating of 3.

Located in Callaway County, this dam poses minimal risk to its surroundings, with no associated locks or outlet gates. While lacking a formal condition assessment, Castle Lake Dam has not been rated negatively and does not currently have an Emergency Action Plan in place. With a spillway width of 20 feet and a maximum discharge of 100 cubic feet per second, this dam serves as a vital water resource for the region, contributing to the irrigation needs of the area. For water resource and climate enthusiasts, Castle Lake Dam offers insight into the importance of small-scale dams in sustaining agricultural activities in rural communities.

Year Completed

1977

Dam Length

1000

Dam Height

20

River Or Stream

SALLY BRANCH

Primary Dam Type

Earth

Surface Area

11

Hydraulic Height

20

Drainage Area

211.2

Nid Storage

53

Structural Height

20

Outlet Gates

None

Hazard Potential

Low

Foundations

Soil

Nid Height

20
       
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.
View more

Area Campgrounds