Cypert 209 Reservoir Report

Last Updated: December 6, 2025

Cypert 209 is a privately owned dam located in Canadian County, Oklahoma, specifically in the city of SEWARD.


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Summary

Built in 1965, this Earth-type dam stands at a height of 35 feet and spans 500 feet in length. It serves as a key structure along Wolf Creek, providing vital water resource management and flood control for the region.

Managed by the Oklahoma Water Resources Board, Cypert 209 has a maximum storage capacity of 520 acre-feet and a normal storage level of 240 acre-feet. The dam's controlled spillway and valve outlet gate help regulate water flow, with a low hazard potential and a very high risk assessment rating. Despite not being rated for its current condition, this dam plays a crucial role in maintaining water quality and availability in the surrounding area.

With state jurisdiction and regulatory oversight, Cypert 209 is subject to regular inspections and enforcement measures to ensure its structural integrity and operational effectiveness. While it has not been modified in recent years, the dam remains a critical infrastructure for water resource management in the region, highlighting the importance of proactive risk management and emergency preparedness in the face of potential climate challenges.

Year Completed

1965

Dam Length

500

Dam Height

35

River Or Stream

WOLF CREEK

Primary Dam Type

Earth

Hydraulic Height

35

Nid Storage

520

Structural Height

35

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

35
       
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.