Kordonowy Dam; Joe Reservoir Report
Last Updated: December 6, 2025
Kordonowy Dam; Joe, located in North Dakota along the Green River, was completed in 1936 by the USDA NRCS and is currently owned and regulated by the local government.
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Summary
The dam serves primarily for recreational purposes, offering a serene 8.3-acre surface area for outdoor enthusiasts to enjoy. Standing at a height of 21 feet and a length of 580 feet, the dam has a low hazard potential and a moderate risk assessment rating.
The dam features an uncontrolled spillway with a width of 50 feet and has a storage capacity of 60 acre-feet. Despite being constructed primarily with earth and stone materials, it has undergone structural modifications in 1969. The dam is inspected and regulated by the NDSWC, with state permitting, inspection, and enforcement processes in place to ensure its safety and functionality. With a risk management plan in place and a moderate risk rating, Kordonowy Dam; Joe continues to provide a valuable recreational resource for the local community.
Although the dam's condition assessment is currently not rated, its emergency action plan status and risk management measures are up to date. With no outlet gates and no associated structures, the dam remains a standalone structure in the St. Paul District. As a key feature along the Green River, Kordonowy Dam; Joe stands as a testament to efficient water resource management and sustainable recreation in North Dakota.
Years Modified |
1969 - Structural |
Year Completed |
1936 |
Dam Length |
580 |
Dam Height |
21 |
River Or Stream |
GREEN RIVER-TR |
Primary Dam Type |
Earth |
Surface Area |
8.3 |
Drainage Area |
0.75 |
Nid Storage |
60 |
Structural Height |
21 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
21 |
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.
Kordonowy Dam; Joe