Byron Dam Reservoir Report

Last Updated: December 5, 2025

Byron Dam, located in Byron, Michigan, is a local government-owned structure that has been regulating the flow of the Shiawassee River since its completion in 1847.


°F

°F

mph

Wind

%

Humidity

Summary

With a primary purpose of recreation, this earth-type dam stands at a height of 15 feet and has a hydraulic height of 15.2 feet, providing a storage capacity of 600 acre-feet and a surface area of 104 acres. The dam's maximum discharge capacity is 1,287 cubic feet per second, with an uncontrolled spillway width of 35 feet.

Despite being classified as having a low hazard potential and fair condition assessment, Byron Dam is subject to regular inspections by the Michigan Department of Environment, Great Lakes, and Energy (DEGLE). The last inspection took place in October 2016, with a frequency of every 5 years. The risk assessment for the dam is moderate, with measures in place for risk management. The dam's location in the Shiawassee River watershed adds to its importance in regulating water flow and providing recreational opportunities for the local community.

Overall, Byron Dam serves as a vital infrastructure for water resource management and recreation in Shiawassee County. With its historical significance and ongoing regulatory oversight, the dam plays a crucial role in maintaining the balance of the local ecosystem and ensuring the safety of nearby residents. As a focal point for both water enthusiasts and climate advocates, Byron Dam stands as a testament to the intersection of human infrastructure and natural resource management.

Year Completed

1847

Dam Length

185

Dam Height

15

River Or Stream

Shiawassee River

Primary Dam Type

Earth

Surface Area

104

Hydraulic Height

15.2

Drainage Area

191

Nid Storage

600

Structural Height

15

Hazard Potential

Low

Nid Height

15
       
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.