Upper Mulberry River Ws Str. # 11 Reservoir Report

Last Updated: December 5, 2025

Upper Mulberry River WS Str.


°F

°F

mph

Wind

%

Humidity

Summary

# 11, also known as Little Mulberry Park Lane, is a state-owned structure located in Gwinnett, Georgia, along the Little Mulberry River. Constructed in 1970 by the Soil Conservation Service (SCS), this earth dam stands at a height of 46.3 feet and spans a length of 740 feet, providing flood risk reduction for the surrounding area. With a storage capacity of 3,890 acre-feet and a drainage area of 4,105 acres, this dam plays a crucial role in managing water resources in the region.

Despite its satisfactory condition assessment as of March 2017, Upper Mulberry River WS Str. # 11 has a high hazard potential, indicating the importance of regular inspections and maintenance to ensure its continued effectiveness in flood risk reduction. The dam operates with uncontrolled spillways and outlet gates, highlighting the need for proactive risk management measures. The structure is regulated by the Georgia Safe Dams Program, with state permitting, inspection, and enforcement in place to uphold safety standards and protect the surrounding community from potential risks associated with dam failure.

As a key component of water resource management in the area, Upper Mulberry River WS Str. # 11 serves as a critical infrastructure for flood control along the Little Mulberry River. With its moderate risk assessment and state oversight, this dam underscores the importance of maintaining and monitoring our water infrastructure to safeguard against potential hazards and ensure the sustainable management of our water resources in the face of changing climate conditions.

Year Completed

1970

Dam Length

740

Dam Height

46.3

River Or Stream

LITTLE MULBERRY RIVER

Primary Dam Type

Earth

Surface Area

45

Drainage Area

4105

Nid Storage

3890

Outlet Gates

Uncontrolled

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

46
       
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.