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Pre-Construction Overview City of Lewiston May-26-2010 ---PAGE BREAK--- Maine Bulk Power Transmission System • 345kV backbone was built in the late 1960’s and placed in service in 1971 – state of the art and built to last. • Since the backbone was built in 1971: 1. Population has increased by 32% and shifted to southern and coastal counties; 2. Electric power consumption has doubled; 3. New generation in new locations and older generation resources (Maine Yankee and Wyman have closed or rarely run; 4. The blackout of 2003 led Congress to enact the 2005 Energy Policy Act; federal reliability rules became mandatory with substantial penalties for non-compliance. 2 ---PAGE BREAK--- Federal, State and Local Approvals • The Maine Public Utilities Commission voted to approve a Certificate of Public Conveyance and Necessity for the project on May 14, 2010 • DEP Permit was received on April 5 2010 • Army Corps of Engineers Permit is expected to be received in June 2010 • Necessary local permits for the Town of Greene were received on May 11, 2010 • Necessary local permits for the Town of Leeds were received on December 21, 2009 • Necessary local permits for the City of Lewiston for Transmission Line Construction were received on May 24, 2010 3 ---PAGE BREAK--- Maine Power Reliability Program • 500 Miles of 345 kV and 115 kV lines crossing more than 75 communities from Eliot to Orrington • 6 new “Greenfield” substations. • 8 expanded and upgraded Substations • Estimated cost of $1.4 billion (8 percent to be borne by Maine ratepayers) 4 ---PAGE BREAK--- Construction in Lewiston North to the Greene Town Line 5 • Approximately 1.4 miles from the Greene Town Line to the new Larrabee Road Substation • Construction of 115 kV H- Frame structures (average height 75’) ---PAGE BREAK--- Construction in Lewiston - Typical Cross Section from the Greene Town Line to Merrill Road 6 ---PAGE BREAK--- Construction in Lewiston - Typical Cross Section from Merrill Road for 1000 feet towards the new Larrabee Road Substation 7 ---PAGE BREAK--- Construction in Lewiston East to the Greene Town Line 8 • Approximately 2 miles from the Greene Town Line to the new Larrabee Road Substation • Construction of 345 kV H- Frame structures (average height 75’), the rebuilding of existing 115 kV H-Frame structures from 45’ H- Frames to monopole structures (average height 75’) and the removal of an existing 34.5 kV line ---PAGE BREAK--- Construction in Lewiston – Typical Cross Section from the Greene Town Line to the east to Merrill Road 9 ---PAGE BREAK--- Construction in Lewiston – Typical Cross Section parallel to Merrill Road towards the new Larrabee Road Substation 10 ---PAGE BREAK--- Construction in Lewiston from Larrabee Road to the Androscoggin River 11 • Approximately 9.5 miles from the new Larrabee Road Substation • Construction of 75 345 kV H-Frame structures (average height 75’), 14 steel monopole structures (average height 120”) and the rebuilding of 1 mile existing 115 kV H-Frame structures from 45’ H- Frames to monopole structures (average height 75’) ---PAGE BREAK--- Construction in Lewiston - Sample Cross Section from the new Larrabee Road Substation to Androscoggin River (design varies) 12 ---PAGE BREAK--- Construction in Lewiston - Sample Cross Section from the new Larrabee Road Substation to Androscoggin River (design varies) 13 ---PAGE BREAK--- Construction Activities • Right-of-Way Clearing • Temporary Access Way Construction • Structure Installation • Wire Stringing • Structure Removal • Substation Site Development and Construction • Restoration 14 ---PAGE BREAK--- Right-Of-Way Clearing • The Right-Of-Way boundary and sensitive natural resources will be clearly flagged before clearing begins • Clearing involves removing trees and vegetation which can endanger the transmission lines, or impede construction. CMP will conform to rigorous standards established by local, state and federal regulations 15 ---PAGE BREAK--- Temporary Access Way Construction • Access ways provide a safe and efficient route for crews to traverse the right-of-way • Generally 15 feet in width • Use of timber mats to cross wetlands and temporary bridges for water crossings • Access ways will be removed and vegetation allowed to grow following construction 16 ---PAGE BREAK--- Structure Installation • The majority of poles used are made out of wood. • Structures arrive by flatbed • Crews will either excavate or auger to prepare for the installation of poles • In some circumstances blasting may be necessary 17 ---PAGE BREAK--- Structure Installation (Cont.) 18 Poles may be erected with Bucket trucks and possibly helicopters ---PAGE BREAK--- Wire (Conductor) Stringing • Wire Stringing will occur within the Right- of-Way and generally will involve the use of helicopters and bucket trucks • If helicopters are used, their duration in a particular area is generally short and their use complies with all local, state and federal regulations 19 ---PAGE BREAK--- Structure Removal • Wires will be removed • Structures will be cut off below grade and removed by contractors 20 ---PAGE BREAK--- Substation Site Development • All necessary clearing, excavation and construction to prepare the site. This includes the creation of access roads, grading, material disposal and blasting if necessary. • Will be periods of increased traffic 21 ---PAGE BREAK--- Substation Construction •Foundation installation. •Equipment delivery, including transformers, breakers and steel Structures. •Restoration of impacted roadways. •Vegetative screening following the completion of construction. 22 ---PAGE BREAK--- Expected Construction Schedule (Livermore Falls to Lewiston) • Right-Of-Way Clearing expected to occur in the Summer and Fall of 2010 • Construction of transmission lines expected to begin in the winter of 2010-2011 and is anticipated to be complete by the fall of 2011 • All necessary restoration will occur shortly after construction is complete 23 ---PAGE BREAK--- Expected Construction Schedule (Wales to Lewiston) • Right-Of-Way Clearing expected to occur in the Fall of 2011 • Construction of transmission lines expected to occur in 2012 and 2013 • All necessary restoration will occur shortly after construction is complete 24 ---PAGE BREAK--- Expected Construction Schedule (Lewiston to Auburn) • Right-Of-Way Clearing expected to occur in the Fall of 2011 • Construction of transmission lines expected to occur in 2012 • All necessary restoration will occur shortly after construction is complete 25 ---PAGE BREAK--- Expected Construction Schedule (Larrabee Road Substation) • Site Development expected to occur 2011 to 2012 • Substation Construction expected to occur 2012 to 2014 • All necessary restoration will occur shortly after construction is complete 26 ---PAGE BREAK--- Restoration • Temporary access ways and bridges to be removed • Construction debris to be removed • Scrub-Shrub vegetation allowed to return to Right-Of- Ways • Wetlands remain undisturbed to the best extent possible 27 ---PAGE BREAK--- Environmental Protection A portion of the project takes place in Maine’s vibrant ecosystems. We work hard to preserve the environment around our work zones and take preventative measures to protect Maine’s natural resources including stringent environmental monitoring and the use of protective measures such as hay bales and silt fences. 28 ---PAGE BREAK--- Communications Communications with key municipal officials: • Will receive updates regarding stages of construction two weeks prior to work • Will receive direct mailings of key activities of the project • E-mail notification will be produced and managed • Regular conference calls per community will be hosted • Face-to-face briefings regarding construction upon request Communications with landowners: • Door-to-door notifications will begin two weeks prior to work • Will receive updates regarding stages of construction • Can participate in a landowner e-mail notifications • Will receive direct mailings of key activities of project • Face-to-face briefings regarding construction upon request General communications: • Media advertising • www.mainepower.com website (key project information and updates) • [EMAIL REDACTED] • Hotline: 1-[PHONE REDACTED] 29