WTP SCADA and Filter Control System Improvements

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.

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.

**Submission:** 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**. Bids shall be submitted in triplicate, sealed, and mailed or delivered to be received, no later than the above time and date.

Each Proposal shall be submitted in a sealed envelope with the Contractor's name on the outside of the envelope. The envelope shall clearly state "Sealed Proposal for the WTP SCADA and Filter Control System Improvements Project."

Proposals shall be evaluated by the Engineering Department of the City of Carrollton, GA based on the following criteria:

| Evaluation Basis | Maximum Points |
| --- | --- |
| Qualifications / Experience/ Stability of Project Team | 10 |
| Technical Merits of Proposal | 10 |
| Proposed Pricing | 45 |
| Locality/ Service/ Availability and previous Experience with specified equipment Warranty | 25 |
| Delivery and Installation Schedule | 10 |

A score will be given for each of the above criteria and the scores weighted based on the percentages listed above. The Contractor with the highest total score will be selected for the project.

Contractors must obtain contract documents and be added to bidders list for their proposal to be considered.

The successful Bidder for this Contract will be required to furnish a satisfactory **Performance Bond and Payment Bond** each in the amount of **100 percent of the Bid**.