Georgia’s Off-shore Wind Opportunities Presented by Bill Bulpitt and Rita Kilpatrick for Tybee Island City Council March 27, 2008

Georgia Wind Working Group The Georgia Wind Working Group formed in 2005 through a partnership involving: -Southern Alliance for Clean Energy -Georgia Tech’s Strategic Energy Institute -Georgia Environmental Facilities Authority The Group consists of people representing utility companies, wind developers, government agencies, universities, and non-profit organizations. GEORGIA WIND WORKING GROUP

Georgia Offshore Wind Maps Class 3 Class 5 Class 4 Class 3 Class 4 50-M above Sea Level 90-M above Sea Level Source: AWS Truewind, 2006

Off-Shore Wind Resource in Georgia Site specific data: – 50 m high anemometer – Online since June 1999 (nearly 7 years) – 27 m deep water, `60 km offshore – 6-minute data averages Source: Southern Winds Project

Southern Winds Off-shore Project By Southern Company and Georgia Tech Began July 1, 2005 To study viability of wind power generation off the Georgia coast Preliminary Findings: Wind resource warrants further review 20 year levelized cost: MW scale: $.08-$.12/kwhr No “show stopper” environmental issues Coastal community acceptance important

Simulated View of a Wind Farm (10MW) 10.2 Miles South Southeast of Tybee Source: Southern Winds Project

US Projects Proposed Prop Atlantic Ocean Gulf of Mexico Cape Wind Associates Winergy LIPA & FPL W.E.S.T. LLC Hull Municipal Southern Company Superior Renewable New Jersey Delaware Buzzards Bay No projects installed in US yet

Benefits of Off-shore Wind Better wind resources Reduced turbulence – steadier wind Higher wind = better energy production Higher capacity factors –load matching Minimize visual impacts with greater distances Proximity to load centers Lower transmission constraints Serve high cost regions Uses indigenous energy Avoids size limits GEORGIA WIND WORKING GROUP Courtesy Walt Musial: NREL

Off-shore Wind Regulation Pending (beyond 3 nautical miles from shore) Minerals Management Service is establishing permitting rules Will require full environmental review for wind farms and cabling pathway Multiple federal and state governing authorities apply Environmental considerations include: -Bird migratory pathways -Habitats – marine, fisheries, avian -Natural reefs and other aquatic life GEORGIA WIND WORKING GROUP

Next Steps for Utilities and Wind Developers Track federal rulemaking process Install a meteorological tower for wind site specific resource assessment Plan wind farm projects where communities are supportive Participate in competitive process for lease site Georgia Wind Working Group Photo Courtesy: NREL

The Georgia Wind Working Group Mission Georgia Wind Working Group Promotes the responsible development and use of wind energy by facilitating stakeholder collaborations, assisting with resource assessments, and enhancing public understanding of the benefits and impacts of wind energy.

Georgia Wind Working Group Provides general public education Provides technical outreach and targeted stakeholder outreach Hosts wind workshops Develops state specific literature Provides presentations at key events GEORGIA WIND WORKING GROUP

The Georgia Wind Working Group looks forward to working with the City of Tybee Island and others to explore wind energy opportunities. Georgia Wind Working Group Photo Courtesy: Georgia Tech SEI

Additional Background on Existing Off-shore Wind Farms

Courtesy: Georgia Tech SEI Arklow

Project Statistics Turbines3.6MW x 7 Depth of piles35-45m Weight of piles280tonne (5m diameter) Weight of turbines290tonne Blades50.5m, 15tonne each Nacelle/Hub height73.5M Rotational speed8.5 – 15 rpm Distance offshore 10km Onshore cable5km Voltage 38kV distribution connected Rotor diameter 104m > soccer pitch area 25MW serves 16,000 households (Irish) Sandbank 24 miles long & 2.5 wide, depths m Largest commercially operating turbines installed to date Largest consented offshore site to date Source: McAdam

Courtesy: Georgia Tech SEI Scroby Sands

Country: United Kingdom Location: East Anglian Coast, 3km east of Great Yarmouth Total Capacity: 60 MW Number of Turbines: 30 Distance to Shore: 2.5 km Depth: 4-8 m Capital Costs: about 110 million Euro Status: Built Construction Date: 2003 Manufacturer: Vestas Total Capacity: 2 MW Turbine-type: V m diameter/ 60m hubheight Mean Windspeed: 7.5 m/s Windfarm Developer: E.ON UK

Courtesy: Georgia Tech SEI Horns Rev

Country: Denmark Location: West Coast Total Capacity: 160 MW Number of Turbines: 80 Distance to Shore: km Depth: 6-12 m Capital Costs: 270 million Euro Status: Operational Construction Date: 2002 Manufacturer: Vestas Total Capacity: 2 MW Turbine-type: V m diameter / 70m hubheight Mean Windspeed: 9.7 m/s Annual Energy output: 600 GWh Windfarm Developer: Elsam