Lake Tarzian Dam Reservoir Report

Last Updated: December 5, 2025

Lake Tarzian Dam, also known as B.S.A.


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Summary

Dam, is a private-owned structure located in Maumee, Indiana. Built in 1970 by the USDA NRCS, this Earth-type dam stands at a height of 48 feet and spans 670 feet in length. With a storage capacity of 1480 acre-feet, the dam primarily serves recreational purposes and is situated on an unnamed tributary of Negro Creek.

Despite its low hazard potential and fair condition assessment, Lake Tarzian Dam poses a high risk, according to a rating of 2. Its inspection frequency is every 5 years, with the last assessment conducted in April 2016. The dam lacks a spillway and outlet gates, emphasizing the importance of monitoring its structural integrity closely. Additionally, the dam is not regulated by any federal agency, underscoring the responsibility of the private owner to maintain its safety and compliance with state regulations.

Water resource and climate enthusiasts interested in Lake Tarzian Dam will find a unique blend of recreational opportunities and environmental considerations at this Indiana location. From its scenic 57-acre surface area to its drainage area of 1.83 square miles, the dam offers a glimpse into the intersection of human activity and natural resources. As efforts continue to ensure the safety and sustainability of this private-owned structure, Lake Tarzian Dam remains a focal point for both leisure and conservation efforts in the region.

Year Completed

1970

Dam Length

670

Dam Height

48

River Or Stream

UNNAMED TRIBUTARY NEGRO CREEK

Primary Dam Type

Earth

Surface Area

57

Hydraulic Height

48

Drainage Area

1.83

Nid Storage

1480

Structural Height

48

Outlet Gates

None

Hazard Potential

Low

Nid Height

48
       
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.