APPENDIX A - DESCRIPTION OF TRANSMISSION LINE STRUCTURE Macro-Corridor Study Appendix A For most of the Project, the Utilities propose to utilize single-pole structures that would have a typical height of 150 feet (Figure A-1). The structures would support the new 345 kV high-voltage transmission line with three current-carrying phases made up of aluminum conductors in addition to two overhead shield wires for the purpose of lightning protection and protective relay communications. Typical spans of the transmission line structures would range from 500 to 1,200 feet. Depending on the final route, the new 345 kV line may be co-located with existing transmission lines. The typical double-circuited structure is shown in Figure A-2. Additionally, there may be locations along the route that utilize different structure designs and/or ROW for purposes of reducing potential impacts. The 345/345-designed structures for the Mississippi River crossing are proposed as low-profile structures with a design height of approximately 75 feet to reduce the likelihood of avian collisions. This lower, wider profile would require a 260-foot-wide ROW (Figure A- 3). The structures would be horizontal-symmetrical H-frame structures on concrete foundations with a typical span length of approximately 500 feet and would consist primarily of tubular steel H-frame structures. To raise the height of the conductor to cross the Mississippi River, one transition structure in the Refuge would be required between the low-profile structures in the Refuge and the crossing structure. This structure would have a proposed height of approximately 90 feet, and the span length would be 500 feet, similar to the remainder of the line in this area. The crossing structures on the banks of the Mississippi River would also consist primarily of tubular steel H-frame structures and would be constructed to an approximate height of 196 feet. The crossing structure height would account for the required distance above the navigable river channel, as defined by U.S. Coast Guard requirements. Dairyland Power Cooperative A-1 Cardinal-Hickory Creek T-Line Project Macro-Corridor Study Appendix A Figure A-1: Typical 345 kV Single-Circuit Monopole Structure Dairyland Power Cooperative A-2 Cardinal-Hickory Creek T-Line Project Macro-Corridor Study Appendix A Figure A-2: Typical 345 kV/161 kV or 345/138 kV Double-Circuit Monopole Dairyland Power Cooperative A-3 Cardinal-Hickory Creek T-Line Project Macro-Corridor Study Appendix A Figure A-3: ITC Low-Profile 345/345 kV Double-Circuit Structure for the River Crossing Dairyland Power Cooperative A-4 Cardinal-Hickory Creek T-Line Project APPENDIX B - LIST OF DATA SOURCES Macro-Corridor Study Appendix B Table B-1: Data Sources Data Type Agency URL Location/Source PROJECT STUDY AREA CHARACTERISTICS Land Characteristics http://pubs.usgs.gov/imap/i2871/ Physiography USGS and NPS http://www2.nature.nps.gov/geology/ Geology USGS http://mrdata.usgs.gov/geology/us/ Land Cover USGS NLCD http://www.mrlc.gov/nlcd11_data.php Environmentally Sensitive Areas Environmental Sensitivity GIS Layer compiled by Stantec for ATC (sources include: County LIOs, Municipalities within Study Area, WDNR, IDNR, USFWS, NPS, Driftless Area Land Conservancy, Sensitive Areas ATC, Stantec Ice Age Trail Alliance, Mississippi Valley Conservancy, NHLT, NRCS, Prairie Enthusiasts, The Nature Conservancy, USACOE, Google Maps, International Crane Foundation, Iowa Audubon Society, PADUS, and SWWRPC) https://www.fws.gov/wetlands/Data/Data- Wetlands USFWS NWI Download.html Commercial/Industrial Aerial photograph interpretation and field WETT Areas reconnaissance Cultural Resources Recorded National http://npgallery.nps.gov/nrhp/Download?path=/na NRHP (NPS) Register Listed Sites treg/docs/All_Data.html Recorded ATC Data supplied by ATC from SHPO Archaeological Sites Hydrologic Data Rivers and Streams USGS http://nhd.usgs.gov/ Open Water (Reservoirs, USGS http://nhd.usgs.gov/ Lakes, Ponds) FEMA 100-year FEMA http://msc.fema.gov/portal Floodplains http://dnr.wi.gov/topic/SurfaceWater/orwerw.htm l Outstanding and WDNR, IDNR Exceptional Waters http://www.iowadnr.gov/Environmental- Protection/Water-Quality/Water-Quality- Standards/Antidegradation Dairyland Power Cooperative B-1 Cardinal-Hickory Creek T-Line Project Macro-Corridor Study Appendix B Table B-1: Data Sources Data Type Agency URL Location/Source Transportation Corridors and Sites http://www.iowadot.gov/gis/downloads/default.asp Major Highways x WDOT, IDOT (Federal, State, Public) http://wisconsindot.gov/Pages/doing-bus/local- gov/wislr/default.aspx http://www.iowadot.gov/gis/downloads/default.as px Railroads WDOT, IDOT http://wisconsindot.gov/Pages/doing-bus/local- gov/wislr/default.aspx Airstrips http://www.faa.gov/airports/airport_safety/airport Private Airstrips FAA, ATC data_5010/ and aerial photograph interpretation, public input http://www.faa.gov/airports/airport_safety/airport data_5010/ FAA-registered FAA FAA MS Excel database incorporated into GIS Airports/Heliports Aerial photograph interpretation and field reconnaissance Socioeconomic Characteristics http://factfinder.census.gov/faces/nav/jsf/pages/in Population Data US Census Bureau dex.xhtml http://factfinder.census.gov/faces/nav/jsf/pages/in US Census Bureau, Unemployment Data dex.xhtml BLS http://data.bls.gov/timeseries/LNS14000000 http://factfinder.census.gov/faces/nav/jsf/pages/in US Census Bureau, dex.xhtml Racial/Ethnic Data CEQ http://energy.gov/nepa/downloads/environmental- justice-guidance-under-nepa-ceq-1997 Recreational Resources Environmental Sensitivity GIS Layer compiled by Stantec for ATC (sources include: County LIOs, Municipalities within Study Area, WDNR, IDNR, USFWS, NPS, Driftless Area Land Conservancy, Sensitive Areas ATC, Stantec Ice Age Trail Alliance, Mississippi Valley Conservancy, NHLT, NRCS, Prairie Enthusiasts, The Nature Conservancy, USACOE, Google Maps, International Crane Foundation, Iowa Audubon Society, PADUS, and SWWRPC) Dairyland Power Cooperative B-2 Cardinal-Hickory Creek T-Line Project Macro-Corridor Study Appendix B Table B-1: Data Sources Data Type Agency URL Location/Source Existing Transmission Lines Existing Transmission Existing datasets from utilities and aerial ATC, ITC, DPC Lines photograph interpretation and field reconnaissance Existing Pipelines (Oil, Existing datasets from utilities and aerial ATC Gas, Water, etc.) photograph interpretation and field reconnaissance BACKGROUND MAPPING Aerial Photography 2015 National Agriculture Imagery http://datagateway.nrcs.usda.gov/GatewayHome.ht USDA-NRCS Program, County ml Mosaics Topographic Maps http://store.usgs.gov/b2c_usgs/usgs/maplocator/(xc 1:24,000 Scale 7.5’ m=r3standardpitrex_prd&layout=6_1_61_48&uiar QuadrangleTopographic USGS ea=2&ctype=areaDetails&carea=%24ROOT)/.do Maps ROUTING OPPORTUNITIES Existing Infrastructure Existing Transmission Existing datasets from utilities and aerial ATC, ITC, DPC Lines photograph interpretation and field reconnaissance Existing http://www.iowadot.gov/gis/downloads/default.asp Highways/Public x WDOT, IDOT Roadways (Federal, http://wisconsindot.gov/Pages/doing-bus/local- State, Public) gov/wislr/default.aspx http://www.iowadot.gov/gis/downloads/default.as px http://wisconsindot.gov/Pages/doing-bus/local- gov/wislr/default.aspx Existing Railroads WDOT, IDOT http://www.dot.state.mn.us/ofrw/maps/MNRailMa p.pdf Existing Pipelines (Oil, Existing datasets from utilities and aerial ATC Gas, Water, etc.) photograph interpretation and field reconnaissance Dairyland Power Cooperative B-3 Cardinal-Hickory Creek T-Line Project Macro-Corridor Study Appendix B Table B-1: Data Sources Data Type Agency URL Location/Source Trails WDNR http://dnr.wi.gov/maps/gis/databureau.html Land Management Property/Tract Lines ATC, County LIO’s Existing datasets from utilities ROUTING CONSTRAINTS Agricultural Lands of USDA NRCS https://gdg.sc.egov.usda.gov/ Statewide Importance Airport Obstruction/Free FAA, ATC, Digitized using FAA runway data and dimensions Zones/Airport Approach ENValue for OFZ’s Flight Paths http://www.faa.gov/airports/airport_safety/airport Private Airstrips FAA, ATC data_5010/ and aerial photograph interpretation, public input http://www.faa.gov/airports/airport_safety/airport data_5010/ FAA-registered FAA FAA MS Excel database incorporated into GIS Airports/Heliports Aerial photograph interpretation and field reconnaissance Recorded ATC Data supplied by ATC from SHPO Archaeological Sites Aerial photograph interpretation and field Center Pivot Irrigation ATC, ENValue reconnaissance Confined Animal https://programs.iowadnr.gov/nrgislibx/ Feeding Operations WDNR, IDNR (CAFO) http://dnr.wi.gov/topic/AgBusiness/data/CAFO/ Environmental Sensitivity GIS Layer compiled by Stantec for ATC (sources include: County LIOs, Municipalities within Study Area, WDNR, IDNR, USFWS, NPS, Driftless Area Land Conservancy, Conservation Easements ATC, Stantec Ice Age Trail Alliance, Mississippi Valley Conservancy, NHLT, NRCS, Prairie Enthusiasts, The Nature Conservancy, USACOE, Google Maps, International Crane Foundation, Iowa Audubon Society, PADUS, and SWWRPC) Dairyland Power Cooperative B-4 Cardinal-Hickory Creek T-Line Project Macro-Corridor Study Appendix B Table B-1: Data Sources Data Type Agency URL Location/Source Environmental Sensitivity GIS Layer compiled by Stantec for ATC (sources include: County LIOs, Municipalities within Study Area, WDNR, IDNR, County Forests and USFWS, NPS, Driftless Area Land Conservancy, Forest Management ATC, Stantec Ice Age