Janzen Lake Reservoir Report
Nearby: Oknoname 083038 Chappel Mrs C.C.
Last Updated: December 18, 2025
Janzen Lake, located in Logan County, Oklahoma, is a privately owned reservoir regulated by the Oklahoma Water Resources Board.
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Summary
Completed in 2002, this earth dam stands at a height of 45 feet and has a storage capacity of 920 acre-feet. The reservoir covers an area of 32 acres and is fed by the tributary of the Cimarron River, making it an essential water resource in the region.
The primary purpose of Janzen Lake is identified as "Other", and it serves as a valuable resource for the community. With a low hazard potential and satisfactory condition assessment, the dam is equipped with a controlled spillway and one outlet valve. The risk assessment for the dam is classified as "Very High (1)", highlighting the importance of emergency preparedness and risk management measures in place.
In the event of an emergency, the dam has a designated inspection frequency of 5 years and emergency action plan (EAP) procedures in place. With its strategic location and vital role in water management, Janzen Lake is a key player in maintaining water security and climate resilience in the region.
Year Completed |
2002 |
Dam Length |
775 |
Dam Height |
45 |
River Or Stream |
TRIB CIMARRON RIVER |
Primary Dam Type |
Earth |
Surface Area |
32 |
Hydraulic Height |
45 |
Drainage Area |
2206 |
Nid Storage |
920 |
Structural Height |
45 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
45 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Janzen Lake