PUBLIC INPUT HEARING Deubrook Elementary School Gymnasium Toronto, - PowerPoint PPT Presentation

ASTORIA STATION PUBLIC INPUT HEARING Deubrook Elementary School Gymnasium Toronto, South Dakota November 27 th , 2017 Docket: EL 17-042 1

PRESENTERS • Bill Swanson, Manager, Supply Engineering • Astoria Station Project Manager • Mark Thoma, Manager, Environmental Services • Astoria Station Permitting Manager 2

CONSULTANTS SUPPORTING PROJECT • HDR • Air Permit and Site Permit Support • Sargent & Lundy • Preliminary Engineering • First District Association of Local Governments • Social & Economic Impact Study • Banner Engineering • Groundwater Evaluation • Power Engineers • Generation-Tie Line Design 3

AGENDA • Who we are • Project need and location • Project components and schedule • Community impacts • Environmental review 4

WHO WE ARE 5

WHO WE SERVE • 70,000 Square Miles • 131,551 Customers • 422 Communities • Avg. population ≈400 • 796 Employees • 472 Minnesota • 205 North Dakota • 119 South Dakota • About 800 MW owned generation 6

HOW WE CREATE ELECTRICITY 2001 2011 2021 9% 12% 24% 10% 1% 53% 31% 16% 59% 80% 1% 4% 7

PROJECT NEED AND LOCATION 8

PROJECT NEED & KEY HISTORY Astoria Station is a needed project for OTP. Three factors: 1. Hoot Lake Plant is retiring in May 2021. • Hoot Lake is a 140 MW coal-fired facility in Fergus Falls, MN. 2. We have expiring capacity contracts in approximately the same timeframe. 3. We project future load growth. 9

ASTORIA, SD - LOCATION Intersection of new 345 kV transmission and major natural gas pipeline is key to SD site advantage Project Site near Astoria, SD BSSB – Big Stone South to Brookings 345 kV CAPX Northern Border Natural Gas Line 10

PROJECT SITE OVERVIEW Astoria 311 345 kV Line 28 482 nd Ave Existing Northern Border Natural Gas Pipeline OTP Property N 11

PROJECT COMPONENTS AND SCHEDULE 12

ASTORIA STATION • Astoria Station will be an approximate 250 MW simple- cycle natural gas combustion turbine. • The peaking plant will serve during periods of high demand or when other generating sources are not available. • Cost ~$165M. We expect the station to be online in 2021. 13

SIMPLE CYCLE TURBINE • Resources Needed: Water, Air, Natural Gas • Major Components: • Inlet Air Filter • Air Compressor Section • Gas Combustion Chamber • Power Turbine • Electrical Generator • Generator Step Up Transformer 14

PLANT GENERAL ARRANGEMENT 45° Angle View Side View 15

GEN-TIE LINE • Less than ½ mile to interconnect to BSSB 345-kV transmission system • 3-5 new structures • OTP’s property connects to the preliminary location identified for the BSSB switching station 16

NATURAL GAS PIPING • Will connect into the Northern Border Pipeline on Otter Tail Existing Northern property Border Pipeline • < 1,000’ pipe from meter station to turbine • 10” diameter pipe OTP Property N 17

WATER LINE • Onsite well is proposed Existing Northern 482 nd Ave Border Pipeline • < 1,500’ long, 5” diameter pipe to storage tank N • Proposed capacity of 100 gpm Well • Above ground 350,000 gallon storage tank • There will be many days or months OTP Property when process water is not required 18

PROJECT SCHEDULE 19

COMMUNITY IMPACTS 20

CONSTRUCTION WORKFORCE Date Number of Workers Onsite Ground Breaking and Month 1 20 Month 2 30 Month 3 30 Month 4 40 Month 5 50 Month 6 60 Month 7 60 Month 8 70 Month 9 70 Month 10 70 Month 11 60 Month 12 40 Month 13 30 21

TRANSPORTATION • Most likely heavy haul route will be East along Hwy 28 from I29 to 482 nd Ave. • Road agreements and heavy haul permits will be reviewed with the Township/County. • Necessary roadway improvements will be made to 482 nd Ave. 22

ECONOMIC IMPACTS • Astoria Station will pay property tax totaling approximately $3 million within the first five years of operation, then approximately $1 million each subsequent year. • These tax payments will get distributed between the Deubrook School District, Deuel County, Scandinavia Township, and the Water and Fire District. • Astoria Station will: • Create construction jobs that equates to approximately $30 million in labor. • Require three to five full-time employees to operate. 23

LOCAL REVIEW COMMITTEE Representatives From: Areas to Study: • Deuel County Commission • Housing Supplies • Educational Facilities and Manpower • Brookings County Commission • Water Supply and Distribution • Deubrook School District 05-6 • Wastewater Treatment and Collection • Deuel School District 19-4 • Solid Waste Disposal and Collection • Town of Astoria • Law Enforcement • Town of Brandt • Transportation • Fire Protection • Town of Toronto • Health • Otter Tail Power Company • Recreation • Government • Energy 24

ENVIRONMENTAL REVIEW 25

ENVIRONMENTAL REVIEW Impacts Studied Included: • Aquatic Ecosystems: No wetland impacts are anticipated • Cultural Resources: No historic properties on the site • Terrestrial Ecosystems: No known threatened, endangered, or rare species • Air Quality • Water Quality • Sound 26

AIR QUALITY: SULFUR DIOXIDE (SO 2 ) LBS/MWH 4 3.5 3 2.5 2 1.5 1 0.5 0 Astoria Station Modern Coal Plant Regional Fossil Average 27

AIR QUALITY: NITROGEN OXIDE (NO X ) LBS/MWH 2.5 2 1.5 1 0.5 0 Astoria Station Modern Coal Plant Regional Fossil Average 28

AIR QUALITY: CARBON DIOXIDE (CO 2 ) LBS/MWH 2500 2000 1500 1000 500 0 Astoria Station Modern Coal Plant Regional Fossil Average 29

WATER QUALITY Water Appropriation: • Test well installed into the Altamont aquifer • Well depth of 679 feet; reports on file with DENR for other wells within five miles are into shallower aquifers Surface Water and Stormwater: • Existing surface water drainage patterns will not be altered • Stormwater from site operations will be directed into a stormwater retention pond 30

SOUND COMPARISONS dBA 140 120 120 100 80 84 70 60 60 60 50 40 36 20 20 0 Whisper Rural Night Office Astoria Station Normal Passenger Tractor Jet Plane at Setting from 482nd Conversation Car Takeoff Ave 31

Thank You! For the latest Project information: otpco.com/AstoriaStation