Walmart Store No 400 Expansion Pond Dam Reservoir Report

Last Updated: December 7, 2025

The Walmart Store No 400 Expansion Pond Dam, located in Montgomery, Texas, was completed in 1995 and is owned by a private entity.


°F

°F

mph

Wind

%

Humidity

Summary

Designed by SITECH ENGINEERING, this concrete dam plays a crucial role in flood risk reduction along the TR-W Fork San Jacinto River. With a height of 14.5 feet and a length of 500 feet, this dam has a storage capacity of 10 acre-feet and serves as a vital infrastructure to protect the surrounding area from potential flooding events.

Despite being classified as having a fair condition assessment, the Walmart Store No 400 Expansion Pond Dam is regulated by the Texas Commission on Environmental Quality (TCEQ) and undergoes regular inspections, permitting, and enforcement measures to ensure its structural integrity and safety. With no spillway and minimal hazard potential, this dam serves as a key component in the flood risk management strategy for the region. Additionally, with a high risk assessment rating of 2, it highlights the importance of ongoing monitoring and maintenance to mitigate any potential risks associated with the structure.

While the dam currently meets guidelines for emergency action plans and risk management measures have not been specified, the Walmart Store No 400 Expansion Pond Dam remains a critical asset in safeguarding the local community from flood events. With its strategic location and design, this dam stands as a testament to the importance of water resource management and climate resilience for private infrastructure owners in Texas.

Year Completed

1995

Dam Length

500

Dam Height

14.5

River Or Stream

TR-W FORK SAN JACINTO RIVER

Primary Dam Type

Concrete

Drainage Area

0.03

Nid Storage

10

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

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.