Site work and new construction of a power facility in Helena, Montana. Completed plans call for the construction of a power facility.

The project consists of the supply and installation of a solar photovoltaic system. Bids are invited for one General Contract on a lump sum basis and must be submitted on the Proposal Form provided with the Contract Documents. Bidders must submit a Bid Bond in the amount of 10 percent of the project bid price. Successful bidders are required to provide a Performance Bond, Labor and Material Payment Bond in the amount of 100 percent of the Contract. Each bidder and subcontractor must have a valid Montana Public Contractor’s License in the proper classification. Contractors must comply with the Montana Prevailing Wage Determination for 2025. The Owner reserves the right to reject any or all bids and to waive any irregularities or informalities. The Owner will collect the 1% Montana Gross Receipts Tax from payments made to the Contractor for work conducted on this project. terpretation or Corrections of Bidding Documents A. Bidders shall promptly notify the Architect of any ambiguity, inconsistency or error, which they may discover upon examination of the bidding, documents, the building and site or local conditions. B. Bidders requiring clarification or interpretation of the bidding documents shall make such a request to the Architect prior to the bid opening. C. Any interpretation, correction, or change of the bidding documents will be made by addendum. Interpretations, corrections, or changes of the bidding documents made in any other manner will not be binding, and Bidders shall not rely upon such interpretations, corrections SCOPE OF WORK A. Provide 50KW (AC) Photovoltaic Array and system at the gymnasium roof of the School and install system components for a grid-tie connection to the Utility via the school's main three-phase 208 volt electrical gear. 1. Specific Electrical Requirements and Standards: Photovoltaic Panels Basis of Design: AC550MBT-144(550w 144 cell bi-facial, minimum 25-year power/performance warranty and 15-year product warranty. Solar PV Array: Photovoltaic mounting equipment shall be premanufactured aluminum ballast bays placed over new EPDM membrane roof and secured by the weight of the ballast blocks. Roof penetrations for the purpose of securing the solar PV system are strictly prohibited. Location of ballast bays and quantity of ballast blocks deployed at each bay, including total system dead load weight and distributed weight shall be presented for District approval by the licensed structural engineer hired by Contractor to create P.E.-stamped, structural drawings for the Project. Inverter Basis of Design: 105 Qty. IQ8P-3P-72-E-US with 208 volt, 3-phase output and minimum 25-year warranty. Inverters shall be at least 96% efficient, integral DC disconnect switch, ground fault protection, arc fault protection, capability of Internet connection through Ethernet or wireless means, and have rapid shutdown capability per 2021 NEC 690.12. Inverters shall comply with UL1741, UL1699B, IEEE 1547 for grid tie and FCC part 15 Class B emissions, RoHS. The inverters shall be rated for NEMA 3R. Combiner/Distribution Panel Basis of Design: PV Combiner panel and commercial gateway 2 to combine inverter outputs into one AC feed to the PV System AC Disconnect Switch. Provide supply side tap at the CT distribution panel on the east side of the building with service equipment. Provide a knife blade style, lockable disconnect at the point of disconnect. Grounding of the racking system, inverters and all components of the AC and DC electrical system shall be per NEC articles 250, 690, 705 and AHJ requirement. Roof mounted conduit shall be supported with pre-manufactured conduit supports (b-line #DB series or equal). AC wiring shall have a voltage drop loss of 1.5% or less. DC wiring shall have a voltage drop loss of 1.5% or less. All DC cabling crossing the roof and at the racking system shall be neatly arranged and supported using stainless steel cable clips, rubber coated stainless steel zip ties, support systems, e.g., exterior-rated cable tray or strut and EMT conduit. The Inverter(s) shall be connected to the internet via ethernet or wireless high speed internet. Free web-based monitoring shall be provided to School District for life of the system. Contractor is responsible for running CAT5 cable from inverter(s) to an internet switch location selected by the School District. The Contractor shall be responsible for all interconnection documents and shall coordinate and facilitate installation of the NorthWestern Energy Net meter.