Mccalla Tr Ranch Inc Reservoir Report

Last Updated: December 8, 2025

McCalla Tr Ranch INC, located in Grady County, Oklahoma, is a privately owned dam with a state-regulated status.


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Summary

Built in 1970, this Earth type dam on TR-SPRING CREEK stands at a height of 24 feet and has a storage capacity of 250 acre-feet. With a low hazard potential and a very high risk assessment score of 1, this dam is equipped with a controlled spillway and a single valve outlet gate.

Managed by the Oklahoma Water Resources Board, McCalla Tr Ranch INC has undergone state inspections, permitting, and enforcement to ensure its safety and compliance with regulations. Despite being in operation for over five decades, the dam's condition assessment is currently listed as "Not Rated", with the last inspection conducted in August 2010. The surrounding area has a surface area of 2 acres and a normal storage capacity of 20 acre-feet, making it an important resource for water supply and flood control in the region.

As climate change continues to impact water resources, the role of dams like McCalla Tr Ranch INC becomes increasingly crucial in managing water flow and mitigating risks. With its strategic location in Grady County and its low hazard potential, this dam serves as a valuable asset for the community and underscores the importance of sustainable water resource management in the face of changing environmental conditions.

Year Completed

1970

Dam Length

460

Dam Height

24

River Or Stream

TR-SPRING CREEK

Primary Dam Type

Earth

Surface Area

2

Hydraulic Height

24

Nid Storage

250

Structural Height

24

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

24
       
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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.