Speltz Pond Reservoir Report

Last Updated: December 5, 2025

Speltz Pond, also known as Louis Rinn Detention, is a privately owned water structure located in Rollingstone, Minnesota.


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Summary

Designed by the USDA NRCS, this dam was completed in 1959 with a primary purpose of flood risk reduction. With a height of 23 feet and a hydraulic height of 25 feet, this earth dam spans 310 feet and has a storage capacity of 13.5 acre-feet.

The pond serves multiple purposes including fire protection, stock or small fish pond, flood risk reduction, and recreation. Situated on the TR-Speltz Creek, this significant water resource has a spillway width of 15 feet and a maximum discharge of 104 cubic feet per second. Despite its moderate risk assessment, the dam's condition assessment is currently not rated, with no recent inspection dates available.

Overall, Speltz Pond plays a crucial role in managing water flow and reducing flood risks in the area. With a unique history dating back to 1959, this privately owned water structure continues to serve the community of Rollingstone, Minnesota, while providing recreational opportunities and essential water management services.

Year Completed

1959

Dam Length

310

Dam Height

23

River Or Stream

TR-SPELTZ CREEK

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

25

Drainage Area

0.25

Nid Storage

13.5

Structural Height

23

Outlet Gates

Uncontrolled

Hazard Potential

Significant

Foundations

Soil

Nid Height

25
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.