Introduction of Selection Criteria

P2M Bridge Study-Working Mtg 080708

Selection Criteria-Introduction

P2M Bridge Study-Working Mtg 080708

THIS STEPSelection/Screening- “All Types” to “Many Types”

Engineering- “Pass-Fail”Architectural- Opportunities and Challenges

NEXT STEP

Selection/Screening- “Many Types” to “Some Types”

Engineering-Performance of types against Engineering criteria

Architectural- Performance of types against Aesthetic criteria

Baseline Assumptions

P2M Bridge Study-Working Mtg 080708

Baseline Assumptions

P2M Bridge Study-Working Mtg 080708

Clearance Diagram

75’ V. for 150’ H.

65’ V. for 300’ H.

River User Survey and River Levels

P2M Bridge Study-Working Mtg 080708

Clearance Diagram

Baseline Assumptions

P2M Bridge Study-Working Mtg 080708

Grades

4.75% max. for all modes

4.75% 4.75%

ALTERNATIVES TESTED-stacked

P2M Bridge Study-Working Mtg 080708

Grades

4.75% 4.75%

ALTERNATIVES TESTED-Different Grades

P2M Bridge Study-Working Mtg 080708

Grades

ALTERNATIVES TESTED-Ramps and Landings

P2M Bridge Study-Working Mtg 080708

Grades

Baseline Assumptions

P2M Bridge Study-Working Mtg 080708

Grades-No Vertical Exaggeration

4.75% max. for all modes

4.75% 4.75%

Baseline Assumptions

P2M Bridge Study-Working Mtg 080708

Bridge High Point and Navigational Route

Not In Same Location

Navigational Route

High Point

1195’

Baseline Assumptions

P2M Bridge Study-Working Mtg 080708

Bridge High Point and Navigational Route

Not In Same Location

Hawthorn

P2M

Marquam

Ross Island

Assumed Nav. Route Existing Nav Route

Existing Nav Route

1392’

ALTERNATIVES TESTED-Same Point w/ Elevated SWF

P2M Bridge Study-Working Mtg 080708

Bridge High Point and Navigational Route

ALTERNATIVES TESTED-Same Point wo/ Elevated SWF

P2M Bridge Study-Working Mtg 080708

Bridge High Point and Navigational Route

Baseline Assumptions

P2M Bridge Study-Working Mtg 080708

Section Width

66’ (maximum)

SDEIS-Concrete Segmental SDEIS-Cable-Stayed

Transit Component Alternatives

P2M Bridge Study-Working Mtg 080708

Section Width

Baseline Assumptions

P2M Bridge Study-Working Mtg 080708

Number of In-Water Piers

4 (maximum)

SDEIS-Concrete Segmental SDEIS-Cable-Stayed

Issues- Shallow Water

P2M Bridge Study-Working Mtg 080708

Number of In-Water Piers