Babcock & Brown Trans Bay Cable Project General Presentation - - PowerPoint PPT Presentation

Babcock & Brown

Trans Bay Cable Project General Presentation To San Francisco Port Commission October 11, 2005

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Trans Bay Cable Project - Summary

The Project will be a new High Voltage Direct Current (HVDC) transmission

system that is 59-miles long and runs under the Bay from the generation rich East Bay into San Francisco

HVDC technology has been proven reliable and effective

Provides “generator-like” power, exactly what San Francisco needs Considered “clean power” a more efficient method to transmit energy underground or

underwater

Studies have shown that the Project will provide significant benefits for ratepayers

CAISO has determined that a new transmission line or other reinforcements

has to be in place following installation of Jefferson-Martin, CCSF Peaker Project and retirement of all older generation in San Francisco

CAISO “approved” TBC’s HVDC Line as the Long Term Electric Infrastructure Project for

San Francisco

TBC determined to be the most viable and economical of all options considered for 2011 and

beyond

Operation date for the Project is anticipated to be early 2009 City of Pittsburg municipal utility will eventually own the Project

Babcock & Brown will develop the project and provide the financing FERC “approved” the Project providing Babcock & Brown and City of Pittsburg the ability to

recover their costs

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Trans Bay Cable Project – Project Benefits

Significant Environmental Benefits

New, “clean” transmission power source, not expected to have significant environmental

impacts, EIR analysis to confirm

Project causes a reduction in transmission system losses, and eliminates associated

emissions

When SF Peakers are installed with Trans Bay Cable Project, Peakers will likely operate less Transmits power from existing power generating facilities near and other transmission lines

feeding the Pittsburg substation

TBC Project will not disrupt heavily populated areas or sensitive nature areas

Enhanced Reliability

Higher reliability than a generator Very secure underwater and underground Not vulnerable to natural disasters on land that would disrupt other transmission systems Reduces power flow on other transmission, especially the Peninsula, benefiting entire

Greater Bay Area

Long term load serving capability Completes the Greater Bay Area transmission loop, increasing transmission system security

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Trans Bay Cable Project – Project Benefits

• Benefits to San Francisco
• CAISO selected TBC Project as the critical third component for San Francisco Reliability

1.

Jefferson to Martin Transmission Line: Shut down Hunters Point

2.

San Francisco Peaker Project: RMR removed from Potrero

3.

TBC HVDC transmission Line from Pittsburg to San Francisco: Post 2011 (possibility 2010) load serving solution

• No impact on San Francisco or other Community Residences or Business
• Local hire Construction Jobs via Project Labor Agreement
• When SF Peakers are installed with Trans Bay Cable Project, Peakers will likely operate

less

• Completes the Greater Bay Area transmission loop, increasing transmission system

security for SF

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Trans Bay Cable Project – Major Project Milestones

Development Agreements Executed with City of Pittsburg: January, 2004 Notice of Preparation Issued Under California Environmental Quality Act (CEQA),

with City of Pittsburg as Lead Agency: August, 2004

FERC “Approval” of TBC Rate Principals: July, 2005 CAISO “Approval” of TBC Project Need: September, 2005 Draft Environmental Impact Report (EIR) Issuance: [January, 2006] Final EIR Issuance: [April, 2006] City of Pittsburg Certification of EIR: [June, 2006] Discretionary Acts (Permits, State Easements, etc.) Complete: [September, 2006] Close of Financing: [October, 2006] Commercial Operation of Line: [January, 2009]

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Trans Bay Cable Project – CEQA Procedures for the Project

City of Pittsburg is acting as lead agency for CEQA purposes

Notice of Preparation was issued in August, 2004, and broadly circulated to 276 public

agencies and environmental groups

Many state and federal agencies are expected to act as responsible agencies under CEQA,

including (for example), State Lands Commission and BCDC

URS engaged to prepare environmental documents City of Pittsburg engaged Lamphier-Gregory for project planning and independent

environmental consulting services

Proposed cable route in the Bay will be the subject of comprehensive

environmental surveys as part of the EIR process

Public scoping sessions are planned for the East Bay and San Francisco in

October and November 2005

Draft EIR expected to be circulated for public comment in 1st quarter 2006 TBC held Public Open House meetings in Potrero Hill and Hunters Point in

September 2005 and the City of Pittsburg in October 2005

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Trans Bay Cable Project – Submarine Cable Route

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Trans Bay Cable Project – Aerial View of HWC Converter Site near the Potrero Substation in San Francisco

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Trans Bay Cable Project – Typical DC Converter Station

Control Building Valve Hall DC Hall Spare Transformer Valve Cooling Converter Transformer Capacitor Bank Busbar AC Filter AC Cable entry DC Cable entry * AC, AIS Switchyard *The dimension of the Converter Station can be reduced by using a Gas Insulated Switchyard (GIS) instead of the Air Insulated Switchyard (AIS).

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Trans Bay Cable Project – Proposed Cable Laying Vessel

Cableship – Giulio Verne

Main features

• Length Overall

133 m

• Moulded Breadth

30 m

• Draft

8.5 m

• Gross Tonnage

10,617 tons

• Dynamic Positioning Control
• Total propulsion Power 5,710 kW
• Capstan

6 m diameter, 50 tons pulling tension

• Linear laying machine

10 tons pulling tension

• Turntable, external dia. 25 m,

capacity 7,000 tons

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Trans Bay Hydroplow DC Cable Underwater Installation

Cable Installation one to two months The Cable is taken to the trench bottom by a stinger Simultaneous lay & burial → cable immediately protected (no cable exposure) Very effective burial method - Jetting power focused on excavation only “Minimal” Environmental Impacts