Airport Wastewater Treatment Plant Improvements – City of Galveston

Galveston Texas

LAN performed preliminary engineering, final design, and construction phase services for modifications to upgrade the existing plant’s capacity from 3.75- to 4.76-MGD and repair items damaged during Hurricane Ike. The project used both FEMA and CDBG-DR reimbursement monies for its completion.

Project components included a new influent lift station installed via caisson construction and rerouting flow from the existing abandoned lift station. Aeration basin modifications included the removal/replacement of all slide, sluice, and weir gates; the entire single drop diffuser system; all blowers; and air piping. The systems were designed to include bioreactor requirements. RAS/WAS modifications included the removal/replacement of all pumps, identified piping, fittings, and valves. Scum pit modifications included two new chopper pumps and all associated piping fittings and connections. Chlorine gas induction units, post-aeration piping, ultrasonic level sensor and all electrical, instrumentation, and controls were installed as part of this project. All existing digester aeration piping was removed and demolished and jet aerators were installed.

A new building was constructed to house all chlorine gas and sulfur dioxide gas systems, as well as all associated piping, fittings, and valves. Electrical components, instrumentation, and controls necessary to operate and maintain all improvements were installed. Other improvements include electrical cable tray removal/replacement, construction of additional concrete plant access drives, and site lighting.

At a glance

1.0-MGD expansion

$7.2M construction cost


Capacity expansion


Complete system rehabilitation


Wastewater treatment design


City of Galveston

Related Work

Wastewater and Reuse

Wastewater Treatment