City of CarrolltonIssuing agency·Carrollton, GA·via the Georgia Procurement Registry (DOAS)This request is for a proposal to furnish all equipment, materials, and installation services to perform all services necessary for control and monitoring system improvements complete with all appurtenances and accessories to be installed at the City of Carrollton Water Treatment Plant. Currently the City's Water Plant operates ten conventional filters. Each filter has six individual valves; left influent, right influent, effluent, drain, wash and rewash, and a shared backwash valve for a total of 61 valves. These valves are controlled using a DeviceNet communication network and two Allen-Bradley ControlLogix PLCs with Panelview touchscreens. DeviceNet is no longer a widely used communication network and has proven more and more difficult for the city to support and maintain throughout the years. The purpose of this project is to abandon the existing DeviceNet based valve control system in lieu of simpler valve controls utilizing conventional discrete and analog wiring. Furthermore, it is the design intent that each filter will be capable of standalone control without the need of the Supervisory ControlLogix PLCs. Each filter will have its own dedicated Allen-Bradley PLC and touchscreen. Additionally, the integrator will replace the plant's existing SCADA system with new HMI software and computer hardware. Proposals shall include all materials, labor, applicable taxes and fees including freight to Carrollton, Georgia.
AB-1
REQUEST FOR PROPOSAL
WTP SCADA AND FILTER CONTROL SYSTEM IMPROVEMENTS
CITY OF CARROLLTON
CARROLLTON, GEORGIA
The City of Carrollton (the “City”) is soliciting sealed proposals for furnishing labor, tools, equipment, and
appurtenances necessary for the construction of the WTP SCADA and Filter Control System
Improvements Project. Proposals will be received by the City at the Carrollton City Hall Third Floor
Conference Room, located at 315 Bradley Street, Carrollton, Georgia 30117, until 2:00 p.m., local time,
on Thursday, December 3, 2026, and then at said office publicly opened and the bid price read aloud.
This request is for a proposal to furnish all equipment, materials, and installation services to perform all
services necessary for control and monitoring system improvements complete with all appurtenances and
accessories to be installed at the City of Carrollton Water Treatment Plant. Currently the City’s Water
Plant operates ten conventional filters. Each filter has six individual valves; left influent, right influent,
effluent, drain, wash and rewash, and a shared backwash valve for a total of 61 valves. These valves are
controlled using a DeviceNet communication network and two Allen-Bradley ControlLogix PLCs with
Panelview touchscreens. DeviceNet is no longer a widely used communication network and has proven
more and more difficult for the city to support and maintain throughout the years. The purpose of this
project is to abandon the existing DeviceNet based valve control system in lieu of simpler valve controls
utilizing conventional discrete and analog wiring. Furthermore, it is the design intent that each filter will be
capable of standalone control without the need of the Supervisory ControlLogix PLCs.
Abandon the existing DeviceNet based valve control system for ten conventional filters with 61 valves and install simpler valve controls utilizing conventional discrete and analog wiring, provide each filter with its own dedicated Allen-Bradley PLC and touchscreen for standalone control, and replace the existing SCADA system with new HMI software and computer hardware, including all equipment, materials, labor, taxes, fees and freight.
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Source: Georgia Procurement Registry (solicitation PE-62250-NONST-2027-000000016), retrieved via the Georgia Procurement Registry (DOAS). View the official posting, and always confirm requirements and deadlines with the issuing agency.
