Yell: wastewater treatment PLC and HMI programming

The National Park Service Intermountain Region seeks programming upgrades to the Programmable Logic Controller and Human Machine Interface systems at the Canyon Village Wastewater Treatment Plant in Yellowstone National Park, with proposals due June 1, 2026 at 10:00 Mountain Time. This is a 100% total small business set-aside; Amendment 01 extended the original quote deadline and incorporated NPS-answered Requests for Information plus attachments 3-34.

Place of performance is Canyon Village, Yellowstone National Park, Wyoming. The contractor must convert all existing ladder logic from the legacy Think & Do V.8 PLC system to Do-More Designer V.1.0 running on a government-furnished Automation Direct H2-DM1E CPU, upgrade the HMI program on the existing CM5-T15W touchscreen hardware, recreate approximately 26 HMI screens and 400+ tags to match current functionality, perform full operational validation, and deliver PDF documentation of all ladder logic with tags and descriptions plus electronic copies of both PLC and HMI programs. The NPS will furnish three hardware components (H2-DM1E CPU, H2-ERM100 Ethernet Remote Master, and two H2-EBC100 Ethernet Base Controllers) and all available existing documentation; the contractor installs the hardware with no rewiring or field terminations anticipated. The system controls an aerated lagoon wastewater treatment process with flocculators, clarifiers, multimedia sand filtration, and three blowers, with one remote rack located approximately 500 feet away. The plant will shut down for approximately one week between October 31 and November 30, 2026 to facilitate the upgrade and Site Acceptance Testing. The NAICS code is 541330, Engineering Services. Award will be firm fixed-price based on best value considering price, technical capability to meet Statement of Work specifications and qualifications, and prior experience including at least two examples of similar projects completed within the past five years. Service Contract Labor Standards apply. Quotations must be submitted by email to kiara_stewart@ios.doi.gov and include a signed acknowledgment of Standard Form 18, completed provisions, a project narrative (maximum two pages), two prior project examples with points of contact, a detailed price schedule, and Contractor Core Data. Questions must be submitted in writing at least seven business days prior to the due date. Award is anticipated one to two weeks after June 1, 2026.