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Southeast Alaska Power Agency

Southeast Alaska Power Agency. NWHA 2014 Annual Conference – Seattle, WA Trey Acteson, CEO.

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Southeast Alaska Power Agency

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  1. Southeast Alaska Power Agency NWHA 2014 Annual Conference – Seattle, WA Trey Acteson, CEO SEAPA’s Mission: To provide the lowest wholesale power rate consistent with sound utility planning and business practices. We exist for the long-term benefit of our member utilities and the rate payers, providing unified regional leadership for project development and prudent management of our interconnected power system.

  2. Southeast Alaska • Regional Profile: • Extends 500 miles Metlakatla to Yakutat • 35,000 sq. miles • Land ownership dominated by Fed 95% • Mostly Inventoried Roadless • 18,500 miles of shoreline • 34 Communities • 28 < 1000 people • 12 < 100 people • S.E. Population 75,000 • 33k Juneau • 20k SEAPA Interconnected Region • 9k Sitka

  3. Who is SEAPA? Southeast Alaska Power Agency • Regional Generation & Transmission Joint Action Agency • SEAPA owns the Tyee and Swan Lake Hydroelectric Projects, providing wholesale power and energy to the Municipalities of Ketchikan, Wrangell and Petersburg • SEAPA owns the transmission lines linking those communities together – Approximately 175 miles of transmission, including 14 miles of submarine cable • Evolved from the Four Dam Power Pool • SEAPA’s hydro projects were originally built by the State in early 1980’s and later purchased • Provide bundled services (Scheduling, Planning, Engineering, O&M, Water Mgmt., etc.) • Facilitate regional project development

  4. SEAPA Control Area Petersburg 20112012 MetersLoad/MWh PSG- 2112 55,404 WRG- 1979 38,509 KTN- 7443181,932 Totals: 11,534 275,845 MWh PSG Wrangell Tyee Note: Only 12,000 meters to spread cost of new development WRG KTN Swan SEAPA Generation Swan Lake Tyee Lake 25 MVA 77,000 MWh 25 MVA 130,000 MWh Ketchikan

  5. Regional Hydrosite Evaluation Purpose: Enhance S. E. Alaska Integrated Resource Plan (SEIRP) • Catalog potential hydropower sites • Establish desired data set for evaluation • Conduct field studies to fill SEIRP gaps • Raise base level of knowledge • Create ranking criteria/methodology • Establish regional database for decision makers

  6. Hydrosite Evaluation – Focus Area

  7. Challenges • Over 60 unique sites • Limited funding 1.7 million • Remote logistics • Weather • Safety • Balancing confidentiality with mission

  8. Project Approach Step 1 - Select project manager (MCM) Step 2 – Define overall objectives (Calibration) • Review Preliminary Assessment (SEIRP) • Perform Gap Analysis Step 3 – Project definition • Data collection objectives Step 4 – Reconnaissance Step 5 – Analysis & Recommendations

  9. Status Inspection criteria defined Project library structure created Gap analysis of SEIRP Reconnaissance plan developed Field team deployed to Annette Island in 2013 to evaluate energy and capacity content capabilities of entire island • Basin hydrology assessment (inflow prediction) • Flood estimation using USGS regression analysis • Stream gauge installation at two sites • Intake/Impoundment surveys • Bathymetric survey (depth) and side band LIDAR (storage) assessment

  10. Process Refinement • Best to deploy hydro guru on initial recon • Cluster “like” sites to minimize costs • Cleary define objective for each site • Clearly define technical teams and equipment • Explore lower-tech data collection options • Ensure adequate redundancy • Expect delays – Be flexible

  11. Photo Tour • Blue Lake – Sitka • Whitman Lake – Ketchikan • Swan Lake – Near Ketchikan

  12. Blue Lake - Sitka Raise dam 83’ New Powerhouse (3) 5.7MW turbines New 1 MW Fish Valve Unit Decommission (4) turbine generators New intake structure and gate house New surge chamber Penstock and tunnel upgrades Additional 34,500 MWH firm energy (27%) Cost: $142M + 15M Diesel Project

  13. More Blue Lake

  14. Whitman Lake – Ketchikan (KPU) Dam constructed in 1927 2 - 42” penstocks 4.6 MW output Supplies hatchery

  15. SEAPA’s Swan Lake Dam 174’ High & 430’ long at crest. Reservoir capacity 86,000 acre-feet.

  16. Swan Lake Reservoir Expansion Project • Cost: $13,391,869 • BENEFITS: • Displaces up to 800,000 gallons of diesel annually ($2.75 million) • Adds 25% more active storage • Maximizes use of existing infrastructure • Shifts spill to winter generation • Compliments other projects • Adds operational flexibility • Timed with load growth

  17. Swan Lake Status • FERC Board of Consultants assembled • 30% Design Firm under contract • Non-capacity license amendment to be filed in April 2014 • Actively pursuing State grant funding • Construction 2015/16

  18. Questions?

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