u.s. 30 corridor - benton county public information meeting september 14, 2011
DESCRIPTION
U.S. 30 Corridor - Benton County Public Information Meeting September 14, 2011. Meeting Purpose & Goals. Project Description Meeting Goals Provide Update Incorporated feedback from last meeting Additional work completed Discuss / Obtain Input On Alignments - PowerPoint PPT PresentationTRANSCRIPT
U.S. 30 Benton County Public Information Meeting9/14/11 1
U.S. 30 Corridor - Benton CountyPublic Information Meeting
September 14, 2011
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Meeting Purpose & Goals• Project Description• Meeting Goals– Provide Update• Incorporated feedback from last meeting• Additional work completed
– Discuss / Obtain Input On Alignments• Short description during presentation• Opportunity to review displays and ask questions• Intent as last formal public input opportunity prior to
environmental document decision.
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Meeting Purpose & Goals, continued• Meeting Goals, continued– Discuss / Obtain Input On Interchange Concepts
• Short description during presentation• Opportunity to review displays and ask questions• Intent as last formal public input opportunity for IA 21• U.S. 218 may require additional review processes
– Present / Obtain Input On Access Layout– Discuss Next Steps and Schedule– Answer YOUR Questions, Address YOUR Concerns
• Please hold questions until end of presentation– Use open house format for additional exhibit displays
and staff available for discussion
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Updates• Updates Provided Tonight…….– Includes• Input from previous meeting reviewed and considered• Information requested at previous meeting
– Adjustments to Alternatives 1 & 3– Alternative 2 not carried forward– New U.S. 218 Interchange Alternative– Access points (driveway and roads) now shown
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Updates, continued• Adjustments to Alternatives 1 & 3– Slight shift in Alternative 1 alignment east of 19th
Ave / V56
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Updates, continued• Alternative 2 not carried forward– Two new lanes added to north where feasible– Shifted to south from west of 19th Ave to east end
of project• Avoid cemetery• Match existing alignment at U.S. 218• Almost 1/3 of project length
– Impacted potential historic property– Construction more complicated / expensive– Fewest public comments in support of
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Updates, continued• New U.S. 218 Interchange Alternative– At existing U.S. 218 alignment– Smaller farm ground impacts– Potential impacts to decision processes and
schedule• Access points (driveway and roads) now
shown
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Alignment Alternatives• Alignment 1
– Two new lanes on south side– Maintain north right of way line
• Avoid or minimize property takings on north side other than at intersections / interchanges
• Minimize total number of parcels impacted– Avoids impacts to potentially historic properties and Calvary
Cemetery• Alignment 3
– Two new lanes on south side– Reconstructed lanes generally along existing alignment– Requires property takings on both sides– Public perception of smaller farm land impacts – Shift to south near historic property & cemetery
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Alignment Alternatives, continuedAlternative Alignment 1
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Alignment Alternatives, continuedAlternative Alignment 3
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Alignment Comparison• Differences now less than previous proposal– Alternative 1 shifted north (closer to existing roadbed east
of 19th Ave– Alignments for Alternative 1 and 3 now identical for
eastern approximately 3 miles• Total Impacts to farm land nearly the same– Alternative has slightly higher calculated land impacts– Currently estimated at less than 3 acres difference along
the approximately 14 mile corridor– Probably consider as equal impacts
• Alternative 3 impacts properties on both sides (in addition to intersection / interchange requirements)
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Alignment Comparison, continued• Costs, traffic characteristics similar• Alternative 1 may provide more flexibility for
construction (more room to build new lanes and maintain old)
• Alternative 3 had higher number of positive comments at last public meeting
• Final design refinements likely to lessen differences– Adjustment to minimize costs and impacts– Potential to become some hybrid of the two
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Alignment Alternatives, continued– “Real world” examples• Application of alternatives to specific locations• Illustrative only
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Alignment Alternatives, continued
Illustrative Example
Not intended as final acquisition lines
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Alignment Alternatives, continued
Illustrative Example
Not intended as final acquisition lines
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Alignment Alternatives, continued
Illustrative Example
Not intended as final acquisition lines
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Alignment Alternatives, continued
Illustrative Example
Not intended as final acquisition lines
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Alignment Alternatives, continued
Illustrative Example
Not intended as final acquisition lines
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Alignment Alternatives, continued
Illustrative Example
Not intended as final acquisition lines
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Alignment Alternatives, continued
Illustrative Example
Not intended as final acquisition lines
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Alignment Alternatives, continued
Illustrative Example
Not intended as final acquisition lines
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Alignment Alternatives, continued
Illustrative Example
Not intended as final acquisition lines
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Interchange Concepts• U.S. 30 / IA 21– Both Diamond Interchanges– Option 1 – U.S. 30 over IA 21– Option 2 – IA 21 over U.S. 30– Same as last meeting
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Interchange Concepts, continued• U.S. 30 / IA 21 – Options 1 & 2
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Interchange Concepts, continued• U.S. 30 / U.S. 218– Option 1 – Folded Diamond, U.S. 218 relocated to
west– Option 2 – Diamond, U.S. 218 relocated to west– Option 3 – Single loop, , U.S. 218 relocated to west– Option 4 – “Parclo B” (2 exit loops), U.S. 218 on
existing alignment
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Interchange Concepts, continued• U.S. 30 / U.S. 218 – Option 1
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Interchange Concepts, continued• U.S. 30 / U.S. 218 – Option 2
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Interchange Concepts, continued• U.S. 30 / U.S. 218 – Option 3
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Interchange Concepts, continued• U.S. 30 / U.S. 218 – Option 4
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Access• Specific drives not previously shown at public
input meetings• Previous approach slightly modified– Previously proposed full access points to be
allowed every ½ mile and limited (right in / right out) access allowed approximately every ¼ mile
– Full Versus Limited
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Access, continuedRight In / Right out Access
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Access, continued• Reviewed Access Control– Goal = Full Access every ½ mile, right in / right out allowed
at ¼ spacing– Very few locations with right in / right out– Safety impacts of allowing full access not significant
• NOW – Proposing to allow some exceptions– A couple locations with FULL access at less than ½ mile
spacing– Existing Residential/Commercial Drives– Not intending to allow exceptions for field entrances– Exceptions not planned for new access points at less than
½ spacing
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Next Steps• Review input received from public input meeting• Presentation to DOT management
– Selection of recommended alignment and IA 21 alternative– Initial discussion on U.S. 218 alternatives
• Field studies & report for additional study area near US 218• State Historical Preservation Office concurrence• Selection of recommended U.S. 218 alternative• Public Hearing on Preferred Alternative• Approval of Environmental Document• Preliminary / Final Design• Right of Way Acquisition• Construction Funding• Construction
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Schedule• Field Studies – Fall 2011• SHPO Concurrence – Spring 2012• Public Hearing – Spring / Summer 2012– Unable to share recommendations prior to meeting– Present preferred alternative– Potential spring planting conflict versus schedule
• Environmental Document Approval – Summer 2012
• Right of Way Acquisition start – 2014 / 2015• Construction start – dependant on funding
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U.S. 30 Corridor – Benton CountyPublic Information Meeting
Questions?Website http://www.iowadot.gov/pim/index.html
Catherine [email protected] 319-364-0235
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Reconstruction of Existing Roadbed• Existing underlying pavement is in poor shape. • Provides an opportunity to correct vertical
alignment / sight distance• Ability to reconstruct bridges to current standards
and provide full shoulders• Allows adjustments to the horizontal alignments
and slopes adjacent to the pavement.• Improved snow storage / reduced drifting• Old roadbed will be reused in project.