Nw Ok Land & Cattle Co. Reservoir Report

Last Updated: December 20, 2025

Nw Ok Land & Cattle Co.


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Summary

is a privately owned earth dam located in Harper, Oklahoma, near the city of Buffalo. Completed in 1940, this dam serves a variety of purposes, with a primary purpose listed as "Other." The dam stands at a height of 26 feet and has a length of 475 feet, providing a storage capacity of 80 acre-feet.

Managed by the Oklahoma Water Resources Board (OWRB), this dam is regulated, inspected, and enforced by the state. It has a controlled spillway and a low hazard potential, with a very high risk assessment rating of 1. Despite its age, the dam's condition remains unrated, with the last inspection conducted in August 2011. Emergency action plans and risk management measures are not currently documented for this structure.

Although Nw Ok Land & Cattle Co. has not undergone recent modifications, its operational capacity remains intact, with one valve outlet gate for water release. Situated on TR BUFFAO CR near the Tulsa District, this dam represents a unique aspect of water resource management in the region, serving as a critical component of the local water infrastructure. For water resource and climate enthusiasts, this structure offers a glimpse into the historical and ongoing efforts to manage water resources effectively in Oklahoma.

Year Completed

1940

Dam Length

475

Dam Height

26

River Or Stream

TR BUFFAO CR

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

26

Nid Storage

80

Structural Height

26

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

26
       
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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.