May 2012

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•Size – 30 MWs plus 22 mile transmission system for a total $260 million capital cost ($20 million invested to date)

•Construction – 2013/2014 -- 200 construction period jobs

•Turbines – Latest Siemens 6 MW megawatt offshore turbine

•Cable – bidirectional cable connects wind farm and island to mainland grid

•Robust wind resource – +9.0 m/s average wind speed at site (30% stronger than typical northeast onshore site)

•Power sales – 20 year power purchase agreement for full project output with National Grid approved by regulators

•Permitting – Located within state waters in a site designated by the state as a “Renewable Energy Zone”

Block Island Wind Farm: The Nation’s First Offshore Wind Farm

Block Island Wind FarmQuonset Point Port Facility

Utility-Scale Wind Farm in RI Sound Will Create Hundreds of Jobs at Quonset:Deepwater Wind Energy Center

PROPRIETARY AND CONFIDENTIAL 3

Concept Plan for Quonset as an Offshore Wind Hub

Existing piers

New pier Area to be dredged

Airport Runway

Direct Jobs Created by A Utility-Scale Offshore Wind Project

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A 1,000 MW energy center creates approximately 1,000 local jobs