Siebrass Dam Reservoir Report

Last Updated: December 5, 2025

Siebrass Dam, located in Webster, Nebraska, serves multiple purposes including fire protection, stock, and small fish pond.


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Summary

Built in 1965, this earth dam stands at a height of 16.1 feet with a length of 348 feet, offering a storage capacity of 70.9 acre-feet. With a low hazard potential and fair condition assessment, the dam has been inspected regularly by the Nebraska Department of Natural Resources, ensuring its safety for the surrounding area.

Situated on Elm Creek, this privately owned dam plays a crucial role in water resource management in the region. Despite being primarily used for non-federal purposes, the dam falls under state regulations with permits, inspections, and enforcement conducted by the Nebraska DNR. With a drainage area of 0.28 square miles and a maximum discharge capacity of 445 cubic feet per second, Siebrass Dam provides essential water storage and flood control benefits for the local community.

As a key infrastructure in the area, Siebrass Dam contributes to maintaining water quality, supporting agriculture, and ensuring public safety. While its primary purpose is centered around fire protection and aquatic resources, the dam's strategic location and design also help in managing water supply for livestock and irrigation. With a commitment to regular inspections and maintenance, Siebrass Dam continues to be a vital asset in the sustainable management of water resources and climate resilience in Webster, Nebraska.

Year Completed

1965

Dam Length

348

Dam Height

16.1

River Or Stream

TR-ELM CREEK

Primary Dam Type

Earth

Surface Area

9.1

Hydraulic Height

16.1

Drainage Area

0.28

Nid Storage

70.9

Structural Height

16.1

Hazard Potential

Low

Foundations

Soil

Nid Height

16
       
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.