Deals Counterparts

Prothea Sells Transmission Line to TransCo for $100 Million

Project Sale Transmission announced Pittsburg, United States Mar 15, 2025
USD1B
Deal Value
operating
Stage
Trans Bay Cable
Project

Prothea has sold a transmission line to TransCo for $100 million, streamlining its asset portfolio.

Source Intelligence

KEY DETAILS

The Trans Bay Cable is a 53-mile, high-voltage direct current underwater transmission cable system. Utility rates are set by the Federal Energy Regulatory Commission (FERC). The cable system provides approximately 40 percent of the electrical power used on a daily basis in San Francisco and its surrounding areas. The transaction requires approval from the California Public Utilities Commission and the FERC, as well as expiration or termination of the waiting period under the Hart-Scott-Rodino Act.

Deal Size
to acquire Trans Bay Cable, LLC (TBC) for approximately $1 billion , including the assumption of debt.
Location
The cable system extends from Pittsburg , California, to San Francisco , California
PPA Details
revenues paid by the California Independent System Operator
Announcement
Nov. 19, 2018
Signing
Nov. 19, 2018
Expected Close
Assuming timely regulatory approvals, the transaction is expected to close in 2019.
PARTIES MENTIONED IN SOURCE
N
NextEra Energy Transmission, LLC buyer

"NextEra Energy Transmission, LLC , a subsidiary of NextEra Energy, Inc. (NYSE: NEE), today announced it has entered into definitive agreements with SteelRiver Infrastructure Fund North America and its partners to acquire Trans Bay Cable, LLC (TBC)"

S
SteelRiver Infrastructure Fund North America seller

"NextEra Energy Transmission, LLC , a subsidiary of NextEra Energy, Inc. (NYSE: NEE), today announced it has entered into definitive agreements with SteelRiver Infrastructure Fund North America and its partners to acquire Trans Bay Cable, LLC (TBC)"

T
Trans Bay Cable, LLC (TBC) project

"to acquire Trans Bay Cable, LLC (TBC) for approximately $1 billion , including the assumption of debt."

W
Wells Fargo Securities, LLC advisor

"Wells Fargo Securities, LLC served as financial advisor"

P
Pillsbury Winthrop Shaw Pittman LLP advisor

"Pillsbury Winthrop Shaw Pittman LLP served as counsel"

E
Ellison Schneider Harris & Donlan LLP advisor

"Ellison Schneider Harris & Donlan LLP served as regulatory counsel to NextEra Energy Transmission."

R
RBC Capital Markets advisor

"RBC Capital Markets served as financial advisor"

W
Winston & Strawn LLP advisor

"Winston & Strawn LLP served as legal advisor to the seller."

high quality Enriched Feb 19, 2026

Timeline

Announced
Mar 15, 2025
Signed
Nov 19, 2018
Closed

Market Context

This deal is part of the Transmission sector in United States.
140
Transmission deals
565
deals in United States
1 of 139 Transmission deals tracked this month · Updated daily

Stay informed

Weekly infrastructure deal intelligence — PPAs, acquisitions, data centers, and more.

Subscribe to Newsletter