Loading...
HomeMy WebLinkAboutSuWa210Alaska Resources Library & Information Services Susitna-Watana Hydroelectric Project Document ARLIS Uniform Cover Page Title: Hydropower prospects for Southcentral Alaska SuWa 210 Author(s) – Personal: Nicholas Goodman, Eric Yould Author(s) – Corporate: TDX Power AEA-identified category, if specified: AEA-identified series, if specified: Series (ARLIS-assigned report number): Susitna-Watana Hydroelectric Project document number 210 Existing numbers on document: Published by: [Anchorage, Alaska : TDX Power, 2007] Date published: October 30, 2007 Published for: Prepared for Renewable Energy Project Alaska Date or date range of report: Volume and/or Part numbers: Final or Draft status, as indicated: Document type: Slide presentation. No commentary. Pagination: [30] p. Related work(s): Pages added/changed by ARLIS: Notes: All reports in the Susitna-Watana Hydroelectric Project Document series include an ARLIS- produced cover page and an ARLIS-assigned number for uniformity and citability. All reports are posted online at http://www.arlis.org/resources/susitna-watana/ Hydropower Prospects for Southcentral AlaskaTDX PowerNicholas GoodmanEric Youldfor Renewable Energy Project AlaskaOctober 30, 2007 Hydropower„Statewide„Southcentral„Susitna project„Chakachamna Characteristics of Hydropower„Renewable energy„High front end cost„Low annual costs„Long lead time for permitting and construction„Long operational life (200 years or more)„Can be very environmentally benign„Can impart major environmental impact Inventory of Alaska HydropowerPotential„U.S. Bureau of Reclamation„U.S. Army Corps of Engineers„256 sites with continuous power greater than 2500 KW„192 billion KWH energy potential„40% of the United States’ untapped hydropower Potential Major AlaskaHydropower ProjectsProject NameRiver SystemInstalled Capacity(Megawatts)Energy(Million KWH/yr)Holy CrossYukon2,800 12,300 RubyYukon1,460 6,400 RampartYukon6,000 34,200 PorcupinePorcupine530 2,320 WoodchopperYukon2,160 14,200 Yukon-AaiyaYukon3,200 21,000 SusitnaSusitna1,500 6,500 ChakachamnaChakachatna320 1,600 Wood CanyonCopper3,600 21,900 StikineStikine2,260 9,900 Note: Chugach Electric Energy Sales approximately 2,500 million KWH Existing HydropowerStatewide„40 projects„Most located in Southeast Existing HydropowerSouthcentral„Eklutna37.5 MW„Bradley Lake 90 MW„Cooper Lake 5 MW Susitna Project Location Susitna Four Dam Scheme Profile of Watana-Devil CanyonDevelopment Devil Canyon Site Layout Watana Facilities Plan Results of Screening Process Alternatives Outside theSusitna Basin Hydro Alternatives Chakachamna HydropowerInvestigationsƒDepartment of InteriorLate 1940sReconnaissanceƒU.S. Army Corps of Engineers1970sReconnaissanceƒAlaska Power AuthorityEarly 1980sPre-feasibilityƒTDX Power2006FERC permit Chakachamna Hydro Power„Studied by Alaska Power Authority in early 1980’s„Divert stream flow from Chakachatna River to a powerhouse on the McArthur River by way of a 10 mile 25 foot diameter power tunnel„Minimal dam on Chakachamna Lake„Installed capacity of 330 MW, generating 1.6 billion KWH annually„Total cost of project in 1980 dollars = $1.0 billion„Project is 40 miles from Chugach Electric power facilities at Beluga Chakachamna Project Location Chakachamna Aerial View Chakachamna Dam Site Power Plant Site Chakachamna Selected Plan Chakachamna Lake Tap Gate ShaftInflow to Power Tunnel McArthur River UndergroundPowerhouse (Chakachamna) Chakachamna Lake Outlet Plan CHAKACHAMNA FISHERIES„5 species of salmon use the basin„Sockeye the main salmon species„Dolly Varden ubiquitous in the streams„Lake trout observed in lake„Not a large anadromous fishery but worthy of protecting„Fish ladders at lake outlet required„Possible temperature enhancement to river CHAKACHAMNA WILDLIFE„56 species of birds„16 species of mammals „Moose, wolves, lynx, bear, wolverine, other fur bearers„None on the endangered species list„Less impact than other hydro projects of similar size Geotechnical Considerations„Seismic – Castle Mountain Fault„Volcanic – Mount Spurr (1992 & 1953 eruptions)„Glacial – Barrier, Blockade, McArthur, Shamrock Geotechnical Overview Next StepsƒPreliminary permitinvestigations 36 monthsƒFERC licensing18-36 monthsƒProject construction76 monthsƒPower on line2015