Long Lake Nwr 7 Reservoir Report
Nearby: Long Lake Nwr - G12 Marsh G19a Dam
Last Updated: December 13, 2025
Long Lake NWR 7, also known as Dike C, is a federal-owned structure located in Burleigh County, North Dakota.
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Summary
This fish and wildlife pond was completed in 1943 with the primary purpose of supporting conservation efforts in the area. The dam is made of earth and stone materials, standing at a height of 8 feet and spanning a length of 4000 feet. It has a storage capacity of 106,200 acre-feet and covers a surface area of 11,600 acres, serving as a vital resource for the local ecosystem.
Managed by the USFWS, Long Lake NWR 7 is regulated by the North Dakota State Water Commission, ensuring proper permitting, inspection, and enforcement measures are in place. The dam is equipped with a controlled spillway, vertical lift gates, and has a low hazard potential. Despite its age, the structure has not been rated for its condition, but is considered to have a very high risk level due to its critical role in managing water resources in the region. With its strategic location on Long Lake Creek, this dam plays a crucial role in maintaining water levels and supporting wildlife habitats in the area.
In the event of an emergency, the dam's Emergency Action Plan is not rated, and there are no recent updates on its risk assessment or management measures. However, with its importance in flood control and habitat preservation, Long Lake NWR 7 remains a key asset in the conservation efforts of the St. Paul District. Water resource and climate enthusiasts can appreciate the significance of this structure in sustaining the delicate balance of ecosystems in North Dakota.
Year Completed |
1943 |
Dam Length |
4000 |
Dam Height |
8 |
River Or Stream |
LONG LAKE CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
11600 |
Drainage Area |
5.54 |
Nid Storage |
106200 |
Structural Height |
6 |
Outlet Gates |
Vertical Lift - 5 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
8 |
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 7