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Regulatory Program. Authority Granted by Congress: Section 10 Rivers & Harbors Act of 1899 Process Leading to Decision: National Environmental Policy Act Purpose: Objective Review Public Involvement Informed Decision. Environmental Impact Statement.
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Regulatory Program Authority Granted by Congress: Section 10 Rivers & Harbors Act of 1899 Process Leading to Decision: National Environmental Policy Act Purpose: Objective Review Public Involvement Informed Decision
Environmental Impact Statement • Jan – June 2002: EIS Scoping • March 2002 hearings • July – November 2002: developed preliminary sites and screening criteria • November – March 2002: Screening list of preliminary alternatives
Environmental Impact Statement • Detailed evaluation of sites undergoing further review • Data collection • Draft EIS released for public review & comment • Public Hearing • Final Environmental Impact Statement • Record of Decision - Issue or Deny permit
Site Screening Process • EIS scoping Spring 2002 • Sites suggested through public comment • initial screening criteria in June 2002 scope • Start with a long list of offshore & terrestrial sites throughout NE • Using available information screen out/eliminate sites do not warrant detailed evaluation
EIS scope “project purpose” Commercial scale renewable energy facility providing power to the New England grid
Range of Alternatives • Practical & feasible in light of the underlying purpose & need for the proposal • Not require costly & time-consuming evaluation of conjectural alternatives
Commercial scale • Applicant proposed 420 MW facility • Recent projects in ISO-NE area range 200-1500MW • Corps has looked at +/-20% as reasonable for previous projects • Example: strip mall not considered a reasonable alternative to a regional shopping mall
Renewable energy • wind, • tidal, • solar, • biomass, • hydroelectric
Renewable technologies • information previously developed by others • which renewable energy sources may be considered feasible at this scale
Wind • Intermittment power source • Highly visible • Technological advances in past 20 years • Fastest growing energy source in U.S. • Generating capacity from 1kw-600mw • More than 20,000 commercial-sized wind turbines producing 2,000mw worldwide within last 10 years. • DOE standardized classification system of wind resource
Tidal • Similar to hydropower concept (barrage, powerhouse, turbine) • Power typically produced during ebb tide • .4mw-240mw generating capacity • Typically tidal ranges > 10-15 feet • Highly variable power generation – tidal cycles • Average capacity 25-30% of maximum output capacity • 240mw – France – 8 meter tide range • Northern Maine only potential New England Location
Wave • Technology is not yet commercially viable • Variety of wave capture technologies (surge, heaving, pitching, oscillating) • Least developed renewable energy technology • Generating capacity 1-30mw • Currently, only small (<5mw) projects in development
Photovoltaic (P/V)/Solar • Solar energy storage – intermittent power • New England has lower direct insolation than other parts of the country • Average duty cycles: 1,500 hours/yr – N.E. • Flat rate systems 50w-200kw • More feasible for off-grid and consumer applications • High cost to produce ($0.38-0.80kwh) • Low efficiency
Biomass • Biomass feedstocks used as fuel source • Direct combustion • Biomass gasification • Close-coupled gasification • Second largest renewable energy resource in U.S. (7,000 mw-installed) • Biomass integrated gasification (BIG) integrated into combined cycle gas turbines – not effective on commercial scale yet • Small scale demonstration projects 25kw-5mw • One BIG/GCGT in Sweden (6mw) • Results in generation of 100’s ton of annual air emissions (NOxSO2)
Hydroelectric • Major hydro capacity is N. New England • Output can vary with seasonal flow • Annual utilization rates of 40-50% (1,000-7,000 hours) • Small hydropower (1-30mw) – 50% of the capacity • Large hydropower (>30mw) – remaining 50% • Utilize impoundments, dams, diversion facilities, canals, run-of-river • Environmental impacts resulting from impoundment
Renewable Technologies Summary Solar not for large scale generation Wave & tidal are still developing, not clear that NE has suitable conditions Hydroelectric sites are in northern NE where there is no demand-existing facilities being decommissioned in some places Wind & Biomass– greatest potential for larger scale projects (Biomass combustion has air quality impacts)
Preliminary Screening Criteria Sufficient surplus electric transmission capacity to transport 200-1,500 MW to load centers throughout the ISO-NE transmission system
Preliminary Screening Criteria Wind Power Classification of 4 or greater (Wind speeds >15.7 mph at 50 meters)
Wind Resource at 65 m Created by TrueWind Solutions and AWS ScientificFunded by Connecticut Clean Energy Fund, Mass. Technology Collaborative, Northeast Utilities Systems
Preliminary Screening Criteria • Available land or offshore watersheet area sufficient to accommodate a 200-1,500 MW wind energy project
Equivalent Land / Water Area Ratio for Wind Energy Generation • Assuming Wind Power Class 4 or greater • Industry Accepted Project Planning Guidelines: • 1.2 X Ratio of Land to Water area for equivalent MW capacity • Land based: • Ridgeline = 1 mile per 10 MW • Open Space = 20 acres per 1 MW • Lower wind class requires more land area per MW
Preliminary Screening Criteria • Engineering and design limitations: • Physical, geological and environmental site conditions • Offshore water depths <50 feet mean low water with significant wave heights of <18 feet • Practical construction and maintenance access of state-of-the-art (2.7 MW or greater) wind turbine generators • Practical construction and maintenance of land and submarine electric transmission line interconnections • Available technology - Use of Alternating Current (AC) transmission systems
Preliminary Screening Criteria • Legal/Regulatory constraints • State or federal land or water use exclusions • Avoidance of state or federally protected environmental resource areas
Alternative Sites • Land-Based Alternatives • Massachusetts Military Reservation • Searsburg, VT • Princeton, MA • Skinner/Kibby townships, ME • Redington Pond/Black Nubble Mountain, ME • Naugatuck and Housatonic Rivers, CT (Brownfield) • Greenfield, MA (Landfill)
Expansion at Searsburg VT. (Existing 6MW Facility)
Expansion at Princeton MA. (Existing Facility)
Skinner / Kibby Township Maine
Redington Black Nubble Mt. Maine
CT. DOT Site (Brownfield)
Alternative Sites • Offshore Alternatives • Nantucket Sound, MA • Nantucket Shoals, MA • Martha’s Vineyard, MA (south) • Block Island, RI • Cape Ann, MA • Vinalhaven Island, ME
Massachusetts Military Reservation, MA • Transmission Capacity Surplus • Available Land Area =Approximately 22,000 acres Wind Power Class = 3 Engineering or Regulatory Constraints • EPA Superfund National Priority Listed Site • Priority Habitats of Rare Species • Adjacent to Shawme –Crowell State Forest and Crane State Wildlife Management Area • Active Military Use with land use restrictions
Searsburg, VT (expansion) Existing-Eleven 550 kW WTGs along .6 miles of ridgeline, encompassing 35 acres = 6 MW Facility • Transmission Capacity Surplus • Wind Power Class 4 Available Land Area • 30-40 MW of additional WTG installation available along adjacent ridgelines • would require private lands acquisition and use of Green Mountain National Forest lands
Princeton, MA (expansion) Existing facility - Eight 40 kW WTGs Princeton Municipal Light Department • Transmission Capacity Surplus Wind Power Class = 2-3 Available Land Area • Wachusett Mt. State Reservation • Minns Wildlife Sanctuary • Private Lands