Long Lake Nwr - G12 Marsh Reservoir Report
Nearby: Long Lake Nwr 7 G19a Dam
Last Updated: December 14, 2025
Long Lake Nwr - G12 Marsh, located in Burleigh, North Dakota, is a federal-owned water resource managed by the USFWS.
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Summary
This marsh serves multiple purposes including fire protection, stock, and small fish pond. Constructed in 1991, the earth dam stands at a height of 6.5 feet and has a normal storage capacity of 129 acre-feet with a maximum storage of 500 acre-feet. The controlled spillway is 30 feet wide, and the outlet gate is a vertical lift.
Despite being rated as having a low hazard potential, Long Lake Nwr - G12 Marsh has a very high risk assessment score of 1. The condition assessment is not rated, and there is no information available on the emergency action plan or risk management measures. The dam does not fall under the jurisdiction of the USACE and is regulated by the NDSWC. With its strategic location on Apple Creek-TR, this marsh plays a crucial role in water resource management in the region.
Water resource and climate enthusiasts will appreciate the significance of Long Lake Nwr - G12 Marsh as a vital ecosystem and water source in North Dakota. Its role in fire protection, wildlife habitat, and water storage makes it a crucial part of the landscape. While the dam is currently considered to have a low hazard potential, the high risk assessment score underscores the importance of monitoring and maintaining this infrastructure to ensure the safety and sustainability of the surrounding environment.
Year Completed |
1991 |
Dam Height |
6.5 |
River Or Stream |
APPLE CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
89 |
Nid Storage |
500 |
Outlet Gates |
Vertical Lift - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
7 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Long Lake Cr Below Long Lake Nr Moffit
|
95cfs |
Apple Creek Nr Menoken
|
59cfs |
Hay Creek At Main Avenue In Bismarck
|
3cfs |
Beaver Creek Bl Linton
|
39cfs |
Missouri River At Bismarck
|
16700cfs |
Burnt Creek Nr Bismarck
|
9cfs |
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.
Long Lake Nwr - G12 Marsh