U.S. 30 Corridor - Benton County Public Information Meeting September 14, 2011

U.S. 30 Benton County Public Information Meeting9/14/11 1

U.S. 30 Corridor - Benton CountyPublic 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• Short description during presentation• Opportunity to review displays and ask questions• Intent as last formal public input opportunity prior to

environmental document decision.


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


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


Updates, continued• Adjustments to Alternatives 1 & 3– Slight shift in Alternative 1 alignment east of 19th

Ave / V56


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


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


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


Alignment Alternatives, continuedAlternative Alignment 1


Alignment Alternatives, continuedAlternative Alignment 3


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)


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


Alignment Alternatives, continued– “Real world” examples• Application of alternatives to specific locations• Illustrative only


Alignment Alternatives, continued

Illustrative Example

Not intended as final acquisition lines


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


Interchange Concepts, continued• U.S. 30 / IA 21 – Options 1 & 2


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


Interchange Concepts, continued• U.S. 30 / U.S. 218 – Option 1


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


Access, continuedRight In / Right out Access


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


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


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


U.S. 30 Corridor – Benton CountyPublic Information Meeting

Questions?Website http://www.iowadot.gov/pim/index.html

Catherine [email protected] 319-364-0235

http://www.iowadot.gov/pim/index.html

mailto:[email protected]


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.

U.S. 30 Corridor - Benton County Public Information Meeting September 14, 2011

Documents

Transcript of U.S. 30 Corridor - Benton County Public Information Meeting September 14, 2011