Red Rock 27 Reservoir Report
Nearby: Red Rock 26 Red Rock 14
Last Updated: December 6, 2025
Red Rock 27 is a newly completed earth dam located in Nicolville, Minnesota, with a primary purpose of flood risk reduction.
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Summary
Built in 2020 by Barr Eng, this local government-owned structure stands at a height of 7 feet and has a storage capacity of 52 acre-feet. Although its hazard potential is rated as low, the dam is regulated, permitted, inspected, and enforced by the Minnesota Department of Natural Resources, ensuring its safety and compliance with state standards.
Situated in Mower County, Red Rock 27 serves as a crucial infrastructure for managing water resources in the region, covering a drainage area of 0.2 square miles. Despite not having a spillway or outlet gates, the dam is equipped with adequate emergency response measures, including an inspection frequency of 8 years. While its condition is currently not rated, the structure's design and construction adhere to state regulations, highlighting its importance in mitigating flood risks and protecting the surrounding community.
As part of the flood risk reduction strategy in Minnesota, Red Rock 27 contributes to the overall water management efforts in the area. With its completion in 2020, the dam adds to the network of structures designed to control water flow and prevent potential flooding events. Through collaboration with state agencies and adherence to safety protocols, Red Rock 27 exemplifies the commitment to sustainable water resource management and climate resilience in the region.
Year Completed |
2020 |
Dam Height |
7 |
Primary Dam Type |
Earth |
Drainage Area |
0.2 |
Nid Storage |
52 |
Outlet Gates |
None |
Hazard Potential |
Low |
Nid Height |
7 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cedar River Near Austin
|
110cfs |
South Fork Zumbro River At Rochester
|
85cfs |
Winnebago River At Mason City
|
166cfs |
Root River Near Pilot Mound
|
303cfs |
Straight River Near Faribault
|
83cfs |
Cedar River At Charles City
|
450cfs |
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.
Red Rock 27