Schock Dam; Ryan Reservoir Report
Nearby: Johnson Dam; Howard Sheep Creek Dam
Last Updated: December 7, 2025
Schock Dam, also known as Wetland #1, is a private earth dam located in Grant County, North Dakota.
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Summary
Designed by the USFWS, this dam serves primarily for fire protection, stock, and small fish pond purposes. Standing at a height of 8.1 feet with a structural height of 11.1 feet, it has a length of 275 feet and a storage capacity of 60 acre-feet. The dam is situated on Antelope Creek-TR and falls under the jurisdiction of the North Dakota State Water Commission.
With a low hazard potential and a moderate risk assessment rating, Schock Dam is not currently rated for its condition but is inspected, regulated, and enforced by the NDSWC. It has an uncontrolled spillway with a width of 70 feet and no outlet gates. The dam has a normal storage capacity of 12.4 acre-feet and covers a surface area of the same size. Despite its modest size and purpose, Schock Dam plays a crucial role in local water resource management and ecosystem conservation efforts in the region.
Dam Length |
275 |
Dam Height |
8.1 |
River Or Stream |
ANTELOPE CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
12.4 |
Drainage Area |
2.67 |
Nid Storage |
60 |
Structural Height |
11.1 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
11 |
Seasonal Comparison
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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.
Schock Dam; Ryan