B09_-_Attachment_3_-_RFI_Log_20MAY26_0001.docx
DOCX document 30 KB Posted
- Solicitation number
- 140P1426Q0071
About this file
This is a Request for Information (RFI) Log documenting vendor questions and National Park Service (NPS) responses for the Canyon Wastewater Treatment Plant PLC and HMI Program Upgrades at Yellowstone National Park, dated May 15, 2026. The project involves upgrading the existing Think & Do V.8 PLC system to Do-More Designer V.1.0 running on a government-furnished Automation Direct H2-DM1E CPU, along with updating the HMI program on existing CM5-T15W hardware. The NPS will provide three pieces of hardware (H2-DM1E CPU, H2-ERM100 Ethernet Remote Master, and two H2-EBC100 Ethernet Base Controllers); the contractor is responsible for installing this hardware with no rewiring or field terminations anticipated. The system consists of three backplanes with one remote rack located approximately 500 feet away, controlling an aerated lagoon wastewater treatment process with flocculators, clarifiers, and multimedia sand filtration.
The awarded contractor must convert all existing ladder logic from the legacy system, 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 wastewater plant will be shut down for approximately one week between October 31 and November 30, 2026, to facilitate the upgrade and testing. The NPS will provide all available existing documentation including program files, hardware photographs, and network configuration settings, though no legacy programming software is available. The project includes basic alarming functions, some instrument calibrations, and Site Acceptance Testing (SAT) to verify the new system looks and operates similarly to the existing system. Payment will be made upon completion and acceptance of services through ACCP in accordance with DOI contracting procedures, with no progressive Net 30 terms, payment or performance bonds, or bid bonds required. Award is anticipated one to two weeks after the quote due date of June 1, 2026.
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Project: Canyon Wastewater Treatment Plant PLC and HMI Program Upgrades Park: Yellowstone National Park Date: 15 MAY 2026 RFI Log
| Vendor Question/Clarification: |
| NPS Response: |
| 1 |
| Please confirm whether any existing network diagrams, communication architecture drawings, P&ID drawings, or system topology documentation are available for review. |
| Yes, all available documents and drawings will be available. |
| 2 |
| System Upgrade Parameters: Please confirm whether the Government intends for all existing flowchart based logic to be fully converted into ladder logic within the new CPU platform. |
| Yes, update from Think & Do V.8 to Do-More |
designer V.1.0 running on a new Govt. supplied H2-DM1E CPU
| 3 |
| System Upgrade Parameters: Please verify which specific hardware components are to be replaced and which components are to remain in service under this contract. |
| NPS supplied hardware: Automation Direct |
1) 1 ea.H2-DM1E CPU
2) 1 ea. H2-ERM100 Ethernet Remote Master
3) 2 ea. H2- EBC100 Ethernet Base Controller All other hardware is ETR
| 4 |
| System Upgrade Parameters: Please clarify whether the awarded contractor will be responsible for installation of the new hardware components, including any required rewiring of PLC racks, I/O modules, or associated field terminations. |
| Contractor is responsible for installing GFE |
1) 1 ea.H2-DM1E CPU
2) 1 ea. H2-ERM100 Ethernet Remote Master
3) 2 ea. H2- EBC100 Ethernet Base Controller All other hardware is ETR, no rewiring or termination is anticipated
| 5 |
| System Upgrade Parameters: Please clarify the format of the existing documentation and the format the Government requires for final deliverables. E. Please confirm whether new HMI tags will need to be created or whether the intent is to reuse existing tags. |
| All existing documentation will be in PDF and |
in Think & Do / C-More program files.
Government deliverables need to be PDF Files of all Ladder Logic with all tags and descriptions and electronic copies of both the PLC and HMI programs with all tags and descriptions included.
HMI tag creation is up to the winning contractor.
The NPS does not know if existing tags can be reused.
| 6 |
| Please indicate whether any other construction, maintenance, or system upgrade activities are expected to occur concurrently at the Canyon Wastewater Treatment Plant during the performance period. |
| No other activities are scheduled, and the plant will be shut down to facilitate this project. |
NPS operations staff may enter the work area to facilitate daily operations.
| 7 |
| Please advise whether coordination with other contractors, subcontractors, or NPS personnel will be required during execution of the PLC and HMI upgrade work. |
| No other contractors are involved with this |
contract. NPS COR / SME will be on site to provide technical/operational support.
| 8 |
| Please confirm whether the wastewater treatment plant must remain operational during the upgrade activities, and if so, whether any operational constraints or phased work requirements apply. |
| NPS plans to shut down Wastewater operations |
to facilitate this upgrade. The Plant will be restarted after completion of the work for testing and commissioning new control system.
| 9 |
| Please provide the anticipated award date or estimated timeframe for contract award associated with Solicitation No. 140P1426Q0071. |
| Award will be made likely a week – two at the most – after the quote due date. |
| 10 |
| Please confirm whether any existing servers will require integration or communication with the upgraded control system. |
| System is stand alone. It is not connected to any NPS Computer or SCADA system. |
| 11 |
| Please indicate whether any lift stations or pump stations will require communication with the upgraded PLC/HMI system. |
| This PLC consists of Three Backplanes or racks. Two are located next to each other inside the main |
controls cabinet. The Third is located in a remote Building approx. 500 feet away. This rack contains two 8 output relay cards and communicates via a network extender connected to an H2-ECB.
| 12 |
| Please confirm whether an in house system expert with control system knowledge will be available to support coordination and technical discussions. |
| Yes, one will be on site. |
| 13 |
| Please clarify whether instrument calibrations will be required as part of this contract. |
| Some calibration should be anticipated. |
| 14 |
| Please indicate if a defined test plan exists for determining successful completion of deliverables. |
| One is being developed. The goal of the functional test is to verify nothing is lost or missing, and the system functions and looks similar the existing system. |
| 15 |
| Please define the terms “As Builts” and “address tags” as referenced in Item 4 of the Solicitation Requirements. |
| As-builts refers to any documented changes to settings i.e. IP address and subnet masks etc. Also to provide electronic PDF copies of the new Ladder Logic program and HMI printouts that includes all names, tags and addresses of inputs, outputs, timers, Etc. |
| 16 |
| Please confirm whether a hard copy or digital copy of the existing Think & Do software will be provided for reference. |
| No Think & Do software is available, only program files from the original installation in 2011. |
| 17 |
| We would like to receive the following: |
· System Documentation: Screenshots of the 'Think' and 'Do' screens, along with the logic flow charts.
· Hardware Specifications: Specific part numbers for the HMI and PLC units included in the scope.
Yes, photos of the HMI screens and photos of the 3 PLC Racks with Cards and HMI display will be available.
No logic flow charts are available, only the Think & Do, and C-More Programs.
| 18 |
| Can you please tell us what kind of wastewater treatment process this is? |
| It is an aerated lagoon system with conventional Flocculators, Clarifiers, and multimedia sand filtration. |
| 19 |
| What is the scheduled shutdown time? What timeframe is allocated for software installation and testing? |
| The Wastewater process will be suspended for approx. 1 week of the winning contractors choosing, starting no sooner that Oct. 31 and no later than Nov.30. 2026. |
| 20 |
| Scope of Work states: Perform live function and operation tests, with the assistance of park personnel, to the satisfaction of the owner's representative. Are there specific commissioning and testing requirements for this project? |
| The Commissioning and functional testing requirements will be to verify the new PLC program and HMI look and perform as close to the existing program as possible. |
| 21 |
| Do schematics and network architecture diagrams exist for this system, and can they be shared? |
| All pertinent documentation that is available will be shared. |
| 22 |
| Are there specific alarming, audit trail, trending or reporting requirements? |
| The system contains basic alarming actions (high/low levels, generator failure, low soda ash Etc.) there are no specific audit/trend/reporting requirements. |
| 23 |
| The provided Department of Labor hourly rate schedule does not provide a rate for an automation engineer. Which hourly rate should be used for this project as we are expecting to utilize a Senior Automation Engineer. |
| Since the DOL hourly rate schedule does not include a specific labor category for “Automation Engineer,” vendors should utilize the hourly rate associated with the labor category that most closely aligns with the duties, experience, and qualifications of the proposed Senior Automation Engineer personnel. |
Please ensure the selected classification is appropriately justified and consistent with the level of effort required under the scope of work.
| 24 |
| Will progressive net 30 payment terms be employed for this project? |
| No. Progressive Net 30 payment terms will not be employed for this project. Payment will be made upon completion and acceptance of services through ACCP in accordance with applicable DOI contracting procedures |
| 25 |
| For pricing and technical review, can you please confirm whether the following documents/details are available to offerors before the quote due date? |
· P&IDs
· I/O list
· Existing Automation Direct / current PLC program files
· Existing HMI program files
· Current address/tag list
· Details of the new replacement hardware and software to be provided by the Government
The Statement of Work says the Park Service will provide the awarded contractor with the existing operational programs, supporting documentation, and replacement hardware. We would like to confirm whether any of these items can be made available during the quotation period, or whether offerors should price based only on the current SOW and include assumptions.
All documentation that is available will be shared.
NPS supplied hardware: Automation Direct
1) 1 ea.H2-DM1E CPU
2) 1 ea. H2-ERM100 Ethernet Remote Master
3) 2 ea. H2- EBC100 Ethernet Base Controller All other hardware is ETR
NPS provides no software, only program files for existing PLC and HMI.
| 26 |
| As we proceed, we wanted to check if you have a Tax Exemption Certificate available |
| We do have one if needed. |
| 27 |
| Is a payment and performance bond required? |
| No. |
| 28 |
| Is a bid bond required? |
| No. |
| 29 |
| What is the actual condition and completeness of the existing program documentation? |
| There is no way determine how complete the existing program documentation is for bidding purposes, all pertinent documentation that is available will be shared. |
| 30 |
| To better understand the scope and complexity of the work and to prepare an accurate cost and schedule estimate, please provide the following documents and clarifications: |
· 1 Updated PLC and HMI source files, including all program logic and comments.
· 2 Current I/O List.
· 3 Cause and Effect Matrix (interlocks and shutdown logic).
· 4 Control Narrative describing the process sequence and operating philosophy.
· 5 Electrical and wiring diagrams showing which field signal is connected to each I/O channel.
· 6 Confirmation that the provided files reflect the current operating system and include all field modifications.
· 7 Clarification as to whether the objective is to replicate the existing functionality exactly or to include improvements and code optimization.
· 8 Identification of any known deficiencies, undocumented modifications, or operational issues with the existing system that the contractor should be aware of.
· 9 Any formal Factory Acceptance Test (FAT) requirements.
· 10 Any formal Site Acceptance Test (SAT) requirements.
· 11 Any formal training requirements for operations and maintenance personnel.
Item #’s 1,2,5,6-All documentation that is available will be shared.
#3 Part or the existing PLC program #4 No control narrative-See available documentation #7 Replicate Existing #8 Communication loss to Rack 3 (NPS believes it is an obsolete hardware issue #9 No formal FAT #10 SAT. NPS will work with contractor to test operation of systems to ensure they look and operate as close to original as possible.
#11 No training Required
NPS supplied hardware: Automation Direct
1) 1 ea.H2-DM1E CPU
2) 1 ea. H2-ERM100 Ethernet Remote Master
3) 2 ea. H2- EBC100 Ethernet Base Controller All other hardware is ETR
| 31 |
| Should the new PLC program be integrated with an existing SCADA system, or is communication required only with the local HMI? |
| HMI only, currently this system is stand alone with no network connectivity outside the plant. |
| 32 |
| Please provide recent photographs of the existing PLC control panels, remote I/O panels, communication modules, and the local HMI installation. |
| Yes, photos of the HMI screens and photos of the 3 PLC Racks with Cards and HMI display will be available. |
| 33 |
| Please provide the network configuration and communication settings, including IP addresses, protocols, and node addressing. |
| These will be provided. |
| 34 |
| Since the existing HMI hardware (Automation Direct CM5-T15W) has already been installed and will remain in service, please clarify whether the HMI scope is limited to updating the existing C-more project by remapping tags and communication settings, while retaining the current screen layouts, graphics, alarms, trends, and navigation. |
| The expectation is the awarded contractor update the PLC program from Think & Do to Do-More and then update the existing HMI (replaced in June of 2024) with similar functionality to the existing screens that are currently operating. Retaining the current screen layouts, graphics, alarms, trends, and navigation is critical future operational functionality. The existing programs for the PLC and HMI will be made available, but not the programming software. |
| 35 |
| Alternatively, please confirm whether a complete redevelopment of all 26 HMI screens and more than 400 tags in C-more is required. |
| Because the Conversion from Think & Do to Do-More, the expectation is the screens and tags will have to be recreated. |
| 36 |
| Is the existing C-more project file available and does it exactly match the HMI currently in operation? |
| Yes. |
| 37 |
| Are all alarms, trends, data logging, recipes, and user security settings required to be retained? |
| Yes |
| 38 |
| Will any new screens, graphics, tags, or functionality be added as part of this project? |
| No |
| 39 |
| Are there any known issues with the current HMI application that should be corrected during the upgrade? |
| No |
| 40 |
| Is the contractor expected to perform only tag remapping and communication updates, or a full validation of all HMI functions? |
| Full Operational Validation will be required |
| 41 |
| Will historical data files and alarm history need to be preserved? |
| No |
Additionally, this dropbox link contains the PLC and HMI from the original installer back in 2011:
https://www.dropbox.com/scl/fi/hg8cbphazmt223zgj9u31/3275-PLC-and-HMI-Combinded.zip?rlkey=ent2m4g03zx7naorac9ag497y&st=wx4v0pt1&dl=0
File details come from the government source that posted it. Updated .