south dakota 100 corridor preservationcon’s • higher constr. costs exit 402 interchange option 1...
TRANSCRIPT
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South Dakota 100 Corridor Preservation
South Dakota 100 South Dakota 100 South Dakota 100 Corridor PreservationCorridor PreservationCorridor Preservation
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• Inform• Receive Input
Purpose of this Public Hearing
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• East Side Corridor – 1993• East Side Corridor EA – March 20, 2003• SD100 Corridor Preservation – October, 2005• SD100 Open House – February 7, 2006• Public Hearing – January 17, 2007
SD100 Project Progress
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• Supplement to EA – Spring, 2007• SDDOT ROW Process – Begin Summer/Fall, 2007
SD100 Project – What’s Next
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• Environmental Assessment Process• SD100 Overview• Update to Corridor Alignment Changes• Interchange Options at 57th
• Interchange Options at I-90 • Rail Yard Relocation Project Update
Public Hearing – January 17, 2007
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Environmental Assessment
What is an Environmental Assessment?
An EA is a study to determine the potential impacts a project may have on the environment.
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Defining the Environmental Process
• Define Goals and Objectives• Identify alternative methods of achieving
those goals• Evaluate the costs and benefits• Selecting the best overall alternative
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Noise Impacts
• Completed a Noise Impact Study• Developed 61 and 66 dBA Contours
- 60 dBA – Conversation Speech- 70 dBA – City Street Corner
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Noise Contours
• 61 dBA Contour- Informational
• 66 dBA Contour- Impacts to Residences
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Typical Section “A”Interstate 29 to 69th Street
Typical Sections
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Typical Section “B”69th Street to Maple Street
Typical Sections
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Typical Section “C”Maple Street to Interstate 90
Typical Sections
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Corridor Speeds
• 55 mph- I-29 to 69th Street- Maple Street to I-90
• 45 mph- 69th St. to Maple St.
Development
Based on 85th percentile
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Access Locations
• 1-Mile Spacing- Tallgrass to 41st Street
• Half-Mile Spacing- 41st Street to Maple Street
• 1-Mile (+/-) Spacing- Maple Street to I-90
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SD100 Corridor
• Reasons for Alignment Shifts- Flatten Curves- Improve Safety at Intersections- Reduce Environmental Impacts- Reduce Construction Costs
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Segment 0 – I-29 to SD115
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Segment 0 – I-29 to SD115• Flatten Curves• Property Utilization
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Segment 0 – I-29 to SD115
• Property Utilization• Intersection Alignment• Flatten out curves
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Segment 1 – SD115 to 69th Street
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Segment 1 – SD115 to 69th Street
• Intersection separation- 85th Street to SD100
• Reduce wetland impacts• Improve intersection alignment
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Segment 1 – SD115 to 69th Street
• Reduce wetland impacts• Follow quarter line• Flatten out curves
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Segment 2 – 69th St to SD42
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Segment 2 – 69th St to SD42
• Improve alignment at 57th Street• Interchange at 57th Street• 69th Street continues east of SD100• Flatten out curves
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Segment 2 – 69th St to SD42
• Follows original EA Alignment
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Segment 3 – SD42 to Interstate 90
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Segment 3 – SD42 to Interstate 90
• Flatten horizontal curves• Avoid Lined Snake habitat
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Segment 3 – SD42 to Interstate 90• Improved terrain for construction• Allow for shorter bridge over Big Sioux River• Avoid Rail Yard• Avoid Lined Snake habitat• Flatten horizontal curves
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57th Street Interchange Option 1(Folded Diamond Interchange)
PRO’S• Improved spacing
CON’S• Increase ROW needs• Driver expectancy• Reduced capacity
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57th Street Interchange Option 2(Single Point Urban Interchange)
PRO’S• Reduced ROW needs• Temp. construction• Driver expectancy
CON’S• Higher Constr. Costs
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Exit 402 Interchange Option 1(Diamond Interchange)
PRO’S• Typical Interchange• Cheapest
CON’S• Increased ROW• Spacing to 60th Street
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Exit 402 Interchange Option 2(Tight Diamond Interchange)
PRO’S• Reduced ROW needs• Cheaper Construction
CON’S• Reduced capacity• Difficult for signal timing
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Exit 402 Interchange Option 3(Single Point Urban Interchange)
PRO’S• Increased Capacity• Driver expectancy
CON’S• Additional ROW needs• Costs
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Project Participation
• Visit with Project Team• Comment Form• Web Site
- www.sddot.com/projects.asp
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Project Overview
• Project Purpose– Reduce Train Crossings on 6th and 8th Streets– Subsequently Improves Safety
• Our Study Will…– Conduct Environmental Assessments– Review Potential Impacts– Enable use of Federal Funds
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Subdivision Map
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Project Background
• History of the Project– Sioux Falls Rail Plan Benefits Study, 2002– Rail Relocation Feasibility Study, 2002– Falls Park West & North Phillips Avenue Master Plan,
2003– Brownfields Study, 2004
• Other Related Projects– Benson Road Extension– SD100
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Alternative Development
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Alternative Development
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Alternative Development
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Alternative Development
• Study Area 1– Alternative 1A
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Alternative Development
• Study Area 1– Alternative 1B
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Alternative Development
• Study Area 2– Alternative 2A
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Alternative Development
• Study Area 2– Alternative 2B
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Alternative Development
• Study Area 2– Alternative 2C
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Next Steps
• Evaluate Potential Impacts• Identify Preferred Alternative• Draft Environmental Assessment• Public Hearing• Final Environmental Assessment• FHWA will Determine Next Step
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How Do I Participate?
• Attend Public Meetings• Comment Forms• Visit with Study Team• Visit the Website
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