Project Information

Bid Title

Adobe Creek Transformer-21; 15 MVA LTC Replacement & Radiator Flange Repair/Regasket

Issuing Agency

City of Palo Alto

Location

California

Published Date

Mar 25, 2026

Closing Date

Apr 9, 2026

Government Level

State & Local

Status

Closed

Original Source

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Bid Documents

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Project Description

Project ID:

Title: Adobe Creek Transformer-21; 15 MVA LTC Replacement & Radiator Flange Repair/Regasket

Addenda: 0

Release Date: 3/25/2026

Due Date: 4/9/2026

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Adobe Creek Transformer-21; 15 MVA LTC Replacement & Radiator Flange Repair/Regasket

Invitation for Bid- Construction

Utilities

93677

Project ID: IFB197195

Release Date: Wednesday, March 25, 2026

· Due Date: Thursday, April 9, 2026 3:00pm

Posted Wednesday, March 25, 2026 10:53am

All dates & times in Pacific Time

Draft Response No Bid14 days, 20 hours, 50 minutes

Post Information

Posted At:Wed, Mar 25, 2026 10:53 AM
Sealed Bid Process:Yes (Bids Sealed / Pricing Sealed)
Private Bid:No

Overview

Summary

The City is soliciting proposals from qualified and experienced vendors to perform the repair and refurbishment of a 15 MVA Allis Chalmers substation transformer equipped with a TLH‑21 on‑load tap changer (OLTC). The existing 1967 TLH‑21 OLTC is exhibiting mechanical failures that prevent proper tap changing, although initial assessments indicate that the transformer’s core and coil remain electrically sound. Additional observed deficiencies include minor oil migration between the OLTC cabinet and main tank, as well as two leaking radiator valves.

The selected contractor will be responsible for the complete replacement of the TLH‑21 OLTC with a certified remanufactured unit, full oil handling and processing for both the OLTC and main transformer tanks, and resealing of all interfaces to eliminate oil transfer. Approximately 4,348 gallons of oil will be drained from the main tank into a contractor‑provided holding tanker for later reuse, while the OLTC tank oil (approximately 760 gallons) will be drained into City‑provided containers and replaced with new transformer‑grade oil if necessary based on testing and condition. The scope also includes replacement of radiator valves and gaskets, removal and replacement of the 60 kV SMD fuse holder, pressure testing of the main tank, and execution of all required pre‑ and post‑work diagnostic testing, including power factor testing, TTR, excitation, winding resistance, SFRA, DGA, and oil quality analysis. The City of Palo Alto Utilities will dispose of any transformer oil that is not intended for reuse.

The objective of this project is to restore full mechanical functionality and dielectric reliability of the transformer and its OLTC system, prevent further degradation, and extend the operational service life of this critical distribution asset. Vendors with demonstrated expertise in OLTC replacement, transformer oil processing, and high‑voltage diagnostic testing are encouraged to submit proposals in accordance with this IFB.

Timeline

Bid Post Date:

March 25, 2026

Question and Clarifications Due Date and Time:

March 30, 2026, 1:00pm

Bid Due Date and Time:

April 9, 2026, 3:00pm

Commodity Codes

• NAICS 238210Electrical Contractors and Other Wiring Installation Contractors
• NAICS 811310Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance

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