nstar transmission reliability project environmental business council update
DESCRIPTION
NSTAR TRANSMISSION RELIABILITY PROJECT ENVIRONMENTAL BUSINESS COUNCIL UPDATE. APRIL 21, 2005. PROJECT NEED DRIVEN BY INCREASING GROWTH WITH DECLINING GENERATION. Load Growth over Past 6 Years Exceeded Historic Average In Greater Boston Area & Communities - PowerPoint PPT PresentationTRANSCRIPT
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PROJECT NEED DRIVEN BY INCREASING GROWTH WITH DECLINING GENERATION
• Load Growth over Past 6 Years Exceeded Historic Average In Greater Boston Area & Communities
• Area Older & Some Newer Generation Stations Have Retired or Announced Plans to Retire
• By June 2006, System Overloads Are Experienced throughout the System without Relief
• Overloads Get Worse with Time, Lead to Outages
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GOAL WAS TO FIND MOST COST-EFFECTIVE ALTERNATIVE TO MINIMIZE IMPACT ON
NATURAL & HUMAN ENVIRONMENT• Type of Transmission Line—Underground
• Cable Technology—Pipe-Type Cable, Over 200 miles in Greater Boston Area
• Route Selected to be Most Direct with Least Impact to People & Environment
• Construction Impact – Tried to Minimize Interferences
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FINAL DESIGN
• Three 345 kV Underground Transmission Lines Located in One Trench Up to Route Split
• Pipe-type Cable, Proven Reliable Technology at 345 kV
• New Switchyard at Origin-Stoughton
• Expand Two Termination Substations-Hyde Park & K Street
• Heat Exchangers at Baker Street & Hyde Park Substations (Reverse Power Flow to W. Roxbury to Reinforce Area)
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SUMMARY OF BENEFITS
• Increases Import Capability into Greater Boston & Surrounding Communities by 1200-1800MW
• Mitigates All Known Reliability Issues for More than 10 Years
• Reduces Dependence on Older Local Generation Stations that Plan to Retire
• Opens Corridor for Economic Generating Sources from SEMA/RI into Greater Boston Area
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PROJECT SCHEDULE OVERVIEW
Planning & Design
Permitting &Engineering
Station Construction
Street Construction
Install & Splice Cable
Mar 2004
Apr 2005
Jun 2006
Feb 2006
Install & Splice Cable
Dec 2007In-Service
Phase 1
Phase 2
June 2006In-Service
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PROJECT STATUS
• Major Permits Secured-MEPA, Siting Board, Con Coms
• Most Follow-on Permits Completed, Some Still in Process– Chapter 91 License for K Street Station-DEP– Stoughton Conservation Commission Appeal to DEP
• MOUs with Boston, Towns, & DCR bound Mitigation Risk, Define Extended Works Hours
• ISO-NE System Technical Issues Resolved (System Switching)
• Major Equipment, Property, and Easements Acquisition Complete
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PROJECT STATUS
• Major Equipment Purchases Complete; ISO Administered RFPs for high dollar items including Pipe-type cable and GIS Equipment
• NSTAR/ISO issued Construction Contract RFP in Nov 2004
• Bid as Single GC for Entire Project or Separately for Lines & Stations
• Transmission Line Contract Awarded; Station Contract in Final Negotiation
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PERMITING PROCESS WAS INTENSE
• EENF Filed 12/15/03; EFSB Petition Filed 1/16/04• MEPA Public Meetings Feb 04; EFSB Public Meetings Mar 04• NSTAR met with Boston & Supplemented EFSB Petition with
Additional Route Alternatives Mar 04• Additional EFSB Public Meeting on New Alternatives April 04• 2 EFSB Interveners Filed—ISO-NE & City of Boston• Siting Board Discovery followed by Intervener Discovery May 04• Submitted Single EIR to MEPA May 04• Unrest in Stoughton Led to Selectmen’s Meeting May 04• Stoughton Filed as Late EFSB Intervener June 04; Hired Counsel• EFSB Accepted Stoughton as Intervener; Stoughton Discovery Jul 04• Received MEPA Certificate July 16, 2004• EFSB Hearings began late July 04
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PERMITING CONTINUED ON• EFSB Hearings Covered Each Section of Petition in Order• Initial Cross-Examination by Boston & Stoughton Tapered Off as
Hearings Progressed• NSTAR worked with Stoughton Counsel to Negotiate Agreement• Town Selectmen Rejected Proposed Agreement• NSTAR Testimony Concluded in Late Aug 04• Stoughton Presented Direct Case with Witnesses-Technical &
Environmental• Second Proposed Agreement with Town Approved; Stoughton
withdrew from Proceedings• Hearings Concluded Sept 04• Con Com Petitions filed Oct 04• Con Com Orders Received Dec 04 except Stoughton Jan 05• EFSB Tentative Decision Dec 04; Final Jan 14, 2005