34. 5-12. 47 kV Power Transformer

The City of Naperville Department of Public Utilities – Electric is requesting bids on the design, manufacture, supply, factory testing, delivery, installation, and supervision of two 34.5–12.47 kV power transformers for the Chicago Substation in Naperville, Illinois under Addendum 4 Revision of IFB 34.5-12.47 kV Power Transformer, with bids due June 22, 2026 at 2:00 p.m. Transformers must be manufactured in the United States, a mandatory eligibility requirement.

The scope encompasses full design and manufacturing; factory testing; delivery to site; placement on the Company foundation; dressing out; filling with oil; final testing; and installation supervision. The contractor must provide one point of contact for project liaison and maintain qualified supervision of crews. All work shall be performed between 7:00 a.m. and 7:00 p.m. Monday through Friday, and 8:00 a.m. to 5:00 p.m. Saturdays unless otherwise authorized. The contract includes a one-year unconditional warranty on all materials and workmanship from final acceptance and payment.

Pricing must be submitted as a lump sum for both transformers with lead time in months specified on the bid worksheet. Payment is due in full upon delivery; contractors may propose alternative payment schedules for review and approval. A bid deposit equal to 10% of the total bid amount in the form of a satisfactory bid bond must accompany the electronic submission. Performance and Payment Bonds equal to 100% of contract price are required.

The bidder must comply with the Illinois Prevailing Wage Act and Employment of Illinois Workers on Public Works Act, participate in approved apprenticeship and training programs under Naperville Municipal Code Section 1-9B, and submit an Affidavit of Compliance and Responsible Bidder Affidavit. A Certificate of Insurance with minimum coverage limits (General Liability $5 million, Auto Liability $2 million, Workers' Compensation per Illinois statute, Property Installation Floater equal to transformer cost, and Contractor's Pollution Liability $2 million) must accompany the bid. Three favorable commercial references from similar projects and a Substance Abuse Prevention Program submission are required.

The non-mandatory pre-bid meeting is scheduled for June 8, 2026 at 2:00 p.m. via Microsoft Teams. Questions are due June 12, 2026 at 12:00 p.m., with responses issued by June 15, 2026 at 12:00 p.m. Bids shall be submitted electronically via the OpenGov procurement portal, with virtual bid opening immediately following the deadline.