Garner Ww Lagoon #1 Reservoir Report

Last Updated: December 5, 2025

Garner Ww Lagoon #1, also known as Wrenn Road #1, is a vital water resource located in Wake, North Carolina.


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Summary

This lagoon is owned and regulated by the local government, with the State Regulatory Agency overseeing its operations. Built in 1988, this Earth-type dam has a hydraulic height of 34 feet and a structural height of 36 feet, with a storage capacity of 394 acre-feet. The lagoon covers a surface area of 25 acres and serves the primary purpose of water management.

With a high hazard potential, Garner Ww Lagoon #1 has been deemed to be in satisfactory condition as of its last assessment in November 2019. The dam has a regular inspection schedule, with the last inspection conducted in 2019 and an inspection frequency of every 2 years. As a crucial infrastructure for the region, the lagoon plays a significant role in managing water resources and ensuring the safety of surrounding communities.

Despite its importance, Garner Ww Lagoon #1 does not have associated structures or federal agency involvement. However, with its location near the Swift Creek-Tr river and within the Wilmington District, the lagoon remains a key component of the local water management system. As water resource and climate enthusiasts, understanding the significance of structures like Garner Ww Lagoon #1 is essential for ensuring sustainable water management practices in the face of changing environmental conditions.

Year Completed

1988

Dam Length

3142

River Or Stream

Swift Creek-Tr

Primary Dam Type

Earth

Surface Area

25

Hydraulic Height

34

Drainage Area

25

Nid Storage

394

Structural Height

36

Hazard Potential

High

Nid Height

36
       
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.