Lake Yankton Reservoir Report
Nearby: Dog Creek Rock Lake 10 & 15
Last Updated: December 13, 2025
Lake Yankton, also known as Brockway Crossing, is a gravity dam located in Lyon County, Minnesota, with a primary purpose of flood risk reduction.
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Summary
Completed in 1942, this dam stands at 8 feet high and spans 17 feet in length, with a storage capacity of 380 acre-feet and a drainage area of 4.6 square miles. The dam is state-regulated and undergoes regular inspections to ensure its structural integrity and satisfactory condition.
Situated on Dog Creek-TR, Lake Yankton serves as a crucial water resource in the region, offering flood protection and storage for the surrounding area. With a low hazard potential and a history of satisfactory condition assessments, this dam provides a sense of security for residents in Balaton, Minnesota, and beyond. The dam's location within the Rock Island District and its oversight by the Minnesota Department of Natural Resources further underscore its importance in managing water resources in the area.
Lake Yankton's role in flood risk reduction, coupled with its efficient design and state regulation, highlights its significance as a vital infrastructure for water management in Lyon County. As climate change continues to impact water resources, the presence of well-maintained structures like Lake Yankton becomes increasingly essential in safeguarding communities against potential flooding events. With a history dating back to 1942, this gravity dam stands as a testament to the ongoing efforts to protect and manage water resources in Minnesota.
Year Completed |
1942 |
Dam Length |
17 |
Dam Height |
8 |
River Or Stream |
DOG CREEK-TR |
Primary Dam Type |
Gravity |
Surface Area |
380 |
Drainage Area |
4.6 |
Nid Storage |
380 |
Structural Height |
8 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
8 |
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.
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