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Board approves second‑year renewal for PLC replacement project; staff to install control panels 3–11 next year
Summary
Hoffman Engineering’s contract renewal for year two of a plantwide programmable logic controller (PLC) replacement project was approved. Year one focused on purchasing parts; year two will complete construction and installation for panels 3–11, scheduled for low‑flow months.
The Englewood Water and Sewer Board approved a first‑year contract renewal for the water treatment plant PLC replacement project that funds the next phase of construction and installation of control panels to modernize obsolete control systems.
Ben Alexenberg, utilities EI&C manager, said the project replaces electrical instrumentation and obsolete programmable logic controllers (PLCs) at the water treatment plant. He described the work as phased: year one was largely parts acquisition (about $1.3 million) to avoid tariff exposure and to procure stainless‑steel control panels and components; year two (proposed July 2025–June 2026) will complete construction and programming and install panels 3 through 11. Alexenberg said panels 12–14 will be addressed in contract year three.
Alexenberg showed pictures comparing the old ultraviolet control panel to the new panel and said the new processor and panel design provide room for growth and new instrumentation. He and staff emphasized commissioning work will occur during a low‑flow season (typically September–March) to avoid service interruptions. Alexenberg described a "method of procedure" risk‑mitigation process staff uses when switching panels and running new and old systems in parallel during commissioning.
Board members asked about the composition of year‑one costs and phasing; staff explained year one was front‑loaded for parts to avoid tariff impacts and allow staged installation without significant downtime. The board approved the renewal with Hoffman Engineering and the planned installation schedule by voice vote.
Staff said the project will continue to support process optimization and cybersecurity compliance, and will enable replacement of other aging instruments and meters after PLC upgrades are complete.
