Southwest Arterial Southwest Arterial DMATS Presentation Project - - PDF document

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Southwest Arterial Southwest Arterial DMATS Presentation Project - - PDF document

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Southwest Arterial Southwest Arterial DMATS Presentation Project Status Update Robert Schiesl Assistant City Engineer PURPOSE OF MEETING Review current project status Inform you of the results and recommendations of the preliminary

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Southwest Arterial Southwest Arterial DMATS Presentation Project Status Update

Robert Schiesl Assistant City Engineer

PURPOSE OF MEETING

Review current project status Inform you of the results and recommendations

  • f the preliminary design VE evaluations

Inform you of the proposed design modifications Project schedule Project schedule Receive your input and comments

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Southwest Arterial Project PROJECT PARTNERSHIP

The #1 Surface Transportation Priority in the Dubuque Area For:

Dubuque City Council Dubuque County Board of Supervisors Dubuque Metropolitan Area Transportation Study (DMATS) Greater Dubuque Development Corporation Dubuque Area Chamber of Commerce

Continuing to move forward with the development of the Southwest Arterial

  • Connects U.S. Hwy 20 with U.S. Hwy 61/151

Southwest Arterial Project

Project Development

  • 4-lane Divided Freeway (6.1 Miles)
  • Priority 1 Access Control
  • Three Interchanges

H 20 H 61/151 N C d R d

Hwy 20, Hwy 61/151, N. Cascade Road

  • Full Build Cost Estimate $125 Million
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Southwest Arterial Project

Corridor Alignment Map

NEPA Clearance - Completed 2004

Preliminary Engineering Design - Completed 2008

Southwest Arterial Project

Where Are We Today?

Preliminary Engineering Design

Completed 2008

  • Final Engineering Design

Underway

  • Right-of-Way Property Acquisition

Underway

  • Archaeological & Cultural Resource Mitigation

Underway

  • Construction

Under Contract - N. Cascade Reconstruction

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  • Value Engineering Study - Completed December, 2009

Southwest Arterial Project

Value Engineering (VE) Study Preliminary Design Evaluation & Recommendations

g g y p , Identify potential modifications that might decrease construction cost

Increase the value of the project

  • Preliminary VE design evaluation - Completed November, 2010
  • 10 - Initial VE Alternatives were evaluated

7 - VE Concepts Recommended For Further Consideration

Potential total estimated VE savings: $7,500,000 3 - VE Concepts Not Recommended

  • Most significant VE recommendations are the proposed

modifications to the SW Arterial / U.S. 20 / Seippel Road interchange area. Potential savings $6,200,000

Original US 20 Interchange Cross Over Cross Over Bridge

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US 20 Interchange - Concept A Not Recommended

  • Folded diamond with

loop ramps

  • Eliminate Cross Over

Bridge over US20 Evaluated Bridge over US20

  • Wetland Impacts
  • Exit Loop Ramp

Speed Deceleration Bottom of Hill Safety Concern

  • Entry Loop Ramp

Slow Entry Speed Slow Entry Speed Merging Traffic Safety Concern

US 20 Interchange - Concept A Not Recommended

Evaluated

  • Folded diamond with

loop ramps

  • Eliminate Cross Over

Bridge over US20 Bridge over US20

  • Wetland Impacts
  • Exit Loop Ramp

Speed Deceleration Bottom of Hill Safety Concern

  • Entry Loop Ramp

Slow Entry Speed Slow Entry Speed Merging Traffic Safety Concern

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US 20 Interchange - Concept A Not Recommended

Evaluated

  • Folded diamond with

loop ramps

  • Eliminate Cross Over

Bridge over US20 Bridge over US20

  • Wetland Impacts
  • Exit Loop Ramp

Speed Deceleration Bottom of Hill Safety Concern

  • Entry Loop Ramp

Slow Entry Speed Slow Entry Speed Merging Traffic Safety Concern

US 20 Interchange - Concept A Not Recommended

Evaluated

  • Folded diamond with

loop ramps

  • Eliminate Cross Over

Bridge over US20 Bridge over US20

  • Wetland Impacts
  • Exit Loop Ramp

Speed Deceleration Bottom of Hill Safety Concern

  • Entry Loop Ramp

Slow Entry Speed Slow Entry Speed Merging Traffic Safety Concern

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US 20 Interchange - Concept C Not Recommended

  • Mixed configuration:

Standard diamond with a folder diamond / loop ramp

  • Eliminate Cross Over

Evaluated

  • Eliminate Cross Over

Bridge over US20

  • Avoids Environmental

Impacts

  • Entry Loop Ramp

Lower Entry Speed Merging Traffic Safety Concern

US 20 Interchange - Concept C Not Recommended

Evaluated

  • Mixed configuration:

Standard diamond with a folder diamond / loop ramp

  • Eliminate Cross Over
  • Eliminate Cross Over

Bridge over US20

  • Avoids Environmental

Impacts

  • Entry Loop Ramp

Lower Entry Speed Merging Traffic Safety Concern

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US 20 Interchange - Concept B Recommended Original US 20 Interchange Cross Over Cross Over Bridge

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US 20 Interchange - Concept B Recommended

  • Change to standard

“diamond interchange” configuration

  • Simple, safe interchange

Design Revisions

  • Eliminate loop ramps
  • Eliminate crossover

bridge over US 20

  • US20 Entry Ramps

Higher entry speeds Improve Merge Traffic

  • US20 Exit Ramps

Less Deceleration

  • Use roundabout

intersections

  • Reduce environmental

and property impacts

  • Reduce project cost by
  • approx. $6.2 million

US 20 Interchange - Concept B Recommended

  • Change to standard

“diamond interchange” configuration

  • Simple, safe interchange

Design Revisions

  • Eliminate loop ramps
  • Eliminate crossover

bridge over US 20

  • US20 Entry Ramps

Higher entry speeds Improve Merge Traffic

  • US20 Exit Ramps

Less Deceleration

  • Use roundabout

intersections

  • Reduce environmental

and property impacts

  • Reduce project cost by
  • approx. $6.2 million
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US 20 Interchange - Concept B Recommended

  • Change to standard

“diamond interchange” configuration

  • Simple, safe interchange

Design Revisions

  • Eliminate loop ramps
  • Eliminate crossover

bridge over US 20

  • US20 Entry Ramps

Higher entry speeds Improve merge traffic

  • US20 Exit Ramps

Less deceleration Improved safety

  • Use roundabout

intersections

  • Reduce environmental

and property impacts

  • Reduce project cost by
  • approx. $6.2 million

US 20 Interchange - Concept B Recommended

  • Change to standard

“diamond interchange” configuration

  • Simple, safe interchange

Design Revisions

  • Eliminate loop ramps
  • Eliminate crossover

bridge over US 20

  • US20 Entry Ramps

Higher entry speeds Improve merge traffic

  • US20 Exit Ramps

Less deceleration Improved safety

  • Use roundabout

intersections

  • Reduce environmental

and property impacts

  • Reduce project cost by
  • approx. $6.2 million
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  • N. Cascade Road / English Mill

Interchange Layout Design Revisions

  • Diamond interchange
  • Use roundabout

intersections

  • Eliminate loop ramp

Eliminate loop ramp

  • Reduce property

impacts by approx. 9 acres

  • Reduce project cost

by approx. $240,000

  • VE Alternative

Eliminate interchange Eliminate interchange No at-grade intersections Priority 1 access control

  • N. Cascade Road / English Mill

Interchange Layout Design Revisions

  • Diamond interchange
  • Use roundabout

intersections

  • Eliminate loop ramp

Eliminate loop ramp

  • Reduce property

impacts by approx. 9 acres

  • Reduce project cost

by approx. $240,000

  • VE Alternative

Eliminate interchange Eliminate interchange No at-grade intersections Priority 1 access control

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  • N. Cascade Road / English Mill

Interchange Layout Design Revisions

  • Diamond interchange
  • Use roundabout

intersections

  • Eliminate loop ramp

Eliminate loop ramp

  • Reduce property

impacts by approx. 9 acres

  • Reduce project cost

by approx. $240,000

  • VE Alternative

Eliminate interchange Eliminate interchange No at-grade intersections Priority 1 access control

  • N. Cascade Road / English Mill

Interchange Layout Design Revisions

  • Diamond interchange
  • Use roundabout

intersections

  • Eliminate loop ramp

Eliminate loop ramp

  • Reduce property

impacts by approx. 9 acres

  • Reduce project cost

by approx. $240,000

  • VE Alternative

Eliminate interchange Eliminate interchange No at-grade intersections Priority 1 access control

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  • N. Cascade Road / English Mill

Interchange Layout

  • Diamond interchange
  • Use roundabout

intersections

  • Eliminate loop ramp

Design Revisions Eliminate loop ramp

  • Reduce property

impacts by approx. 9 acres

  • Reduce project cost

by approx. $240,000

  • VE Alternative

Eliminate interchange Eliminate interchange No at-grade intersections Priority 1 access control

  • Eliminate retaining walls
  • Provide landscaped cut

slopes on both sides of Southwest Arterial Military Road Area Revisions

  • Requires additional

property acquisition

  • Reduce project cost

by approx. $2 Million

  • Added bike / pedestrian

trail between Military Road and US 151 / 61 Original Tiered Wall Concept

  • VE Alternative

Construct tunnel Cost prohibitive Landscaped Slopes Recommended

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  • Folded diamond with

loop ramps

  • Use roundabout

intersections Design Revisions

  • Eliminate 2 bridges
  • n ramps, switch to

box culvert

  • Added bike / pedestrian

trail through interchange to Old Davenport Road

  • Reduce project cost

US 151 / 61 Interchange Layout by approx. $400,000

  • Folded diamond with

loop ramps

  • Use roundabout

intersections Design Revisions

  • Eliminate 2 bridges
  • n ramps, switch to

box culvert

  • Added bike / pedestrian

trail through interchange to Old Davenport Road

  • Reduce project cost

US 151 / 61 Interchange Layout by approx. $400,000

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Design Revisions

  • Folded diamond with

loop ramps

  • Use roundabout

intersections

  • Eliminate 2 bridges
  • n ramps, switch to

box culvert

  • Added bike / pedestrian

trail through interchange to Old Davenport Road

  • Reduce project cost

US 151 / 61 Interchange Layout by approx. $400,000 Roundabouts move traffic safely & efficiently:

  • Slower speeds
  • Fewer conflict points
  • Easy decision making

Roundabouts provide:

  • 90% reduction in fatal crashes
  • 76% reduction in injury crashes
  • 30-40% reduction in pedestrian crashes
  • 10% reduction in bicycle crashes
  • No traffic signal costs
  • Environmental benefits
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Southwest Arterial Project Schedule

  • N. Cascade Road Grading - Stage 1

Oct - Nov 2010

  • N. Cascade Road Grading - Stage 2

July 2011 - Sept 2011

  • N. Cascade Road Bridge

March 2011 - July 2011

  • English Mill Road Utility Relocation

Summer 2011

  • E

li h Mill R d G di & B id J l 2011 N 2011

Project Schedule

  • English Mill Road Grading & Bridge

July 2011 - Nov 2011

  • Military Road Grading & Bridge

Summer 2012 **

  • SW Arterial Grading, 4-Lane

To be Determined **

  • SW Arterial Paving, 2-Lane

To be Determined **

** Schedules are subject to change, based on funding availability Southwest Arterial Project

Side Road Improvement Projects

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North Cascade Road

Under Construction

North Cascade Road

Under Construction

  • N. Cascade Bridge
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North Cascade Road Bridge

Architectural Rendering

Summer 2011

North Cascade Road Bridge

Architectural Rendering

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North Cascade Road Bridge

Architectural Rendering

Funding Summary

Southwest Arterial Project

Appropriations Amount Federal Funding $ 32,805,334

*

*

After SAFETEA-LU obligation limitations applied

** State funding programmed in FY2013 / 2014

State Funding $ 17,760,000

**

City / County Funding $ 15,808,967 Total Federal / State / Local Funding: $ 66,374,301 FY 2009 - 2010 $ 21,923,942 FY 2011 $ 6,057,500 Total Expenditure Obligation: $ 27,981,442

Expenditure Obligation Summary

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Property Acquisition (4-Lane, Hwy 20 - Hwy 61/151) $ 9.8 Million Iowa DOT - Land Acquisition Services $ 330 000

Southwest Arterial Project

Interim Build Alternative Pave 2-Lane Highway (Hwy 20 to Hwy 61/151)

Iowa DOT Land Acquisition Services $ 330,000 Final Engineering Design $ 8 Million Mitigation $ 2 Million Construction $ 78.2 Million

  • Grading (4-Lane, Hwy 61/151 - Hwy 20)
  • Pave 2-Lanes (Hwy 20 - Hwy 61/151)
  • Partial Interchange (Hwy 20)
  • Partial Interchange (Hwy 20)
  • Partial Interchange (Hwy 61/151)
  • Temp At-Grade Intersection (N. Cascade)

Interim Build Cost Estimate: $ 98.3 Million

Project Cost

Interim Build Cost Estimate $ 98.3 Million

Southwest Arterial Project

  • 2-Lane Highway
  • Hwy 20 to Hwy 61/151

Federal Funding $ 32.8 Million State Funding $ 17.8 Million Local Funding $ 15.8 Million Funding Gap $ 32 Million

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S th t A t i l Questions? Southwest Arterial Project Status Update