Waste Water Department

The City of Crowley Wastewater Treatment facility is a 2.47 MGD (million gallon per day) average design flow and a 3.22 MGD peak design flow intermediate Open March/ Rock-Reed Treatment System with Ultraviolet Disinfections.

Tim Cradeur, Director of Wastewater
Phone: (337) 783-0824
Emergency After Hours: (337) 784-6539

412 Conrad Road
Crowley, Louisiana 70526

Monday through Friday, 7:30 AM - 3:30 PM

Flow Pattern

The wastewater entering the City of Crowley Treatment Facility from the Main Influent Pump Station is pumped into the seventy-eight Facultative Treatment Pond. The pretreated wastewater flows by gravity to the torpedo grass plot and then into the aerated lagoon. From there it flows by gravity into the eighteen-acre rock-reed filter system for secondary treatment. The treated wastewater again flows by gravity into the ultraviolet disinfections system and then into the post aeration basin. Finally the disinfected wastewater flows by gravity via 24 inch RCP pipe to the discharge point in Bayou Plaquemine Brule, or is circulated to the facultative pond via the re-circulation system.

Treatment Facilities

Wastewater is collected in the facultative treatment pond for fifty-one days at average design flow rates. Ten wind driven aerators are used to help prevent odor and algae buildup. After the raw sewage is pretreated, the wastewater gravity flows to the intermediate open marsh, which contains bulrush and duckweed, then into the torpedo grass plot aerated lagoon for a period of 24 hours. This serves to increase dissolved oxygen and promote nitrification/denitrification. From the plot aerated lagoon, the wastewater flows by gravity into the eighteen acre rock-reed filter system where the bulrush and rocks for secondary treatment. The treated wastewater then flows by gravity into the ultraviolet disinfections system and then through a post aeration basin. The disinfected wastewater then flows to its final discharge point.

SCADA System

SCADA is an acronym for Supervisory Control and Data Acquisition. It is technology, which allows the treatment plant operator to receive continuous information on the plant's processes and to exercise programmatic control over those processes. SCADA systems can also log real-time data for later reference. Historical data is important to the treatment plant operator. It is used to assist the operator in understanding the plant's operating characteristics, and how it responds to changing conditions.

Emergency Generator

Electricity is the life-blood of a modern wastewater treatment facility. Pumps, blowers, controllers, and instrumentations require electricity to operate. To provide power for wastewater treatment in the event of a power outage, the wastewater treatment plant has a large diesel-powered emergency generator.

Collection System and Pump Stations

The existing Crowley Sewer System consists of a network of laterals, trunk sewers, pump stations, and force mains.