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Alternatives |
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From January to May, 2007 the Sellwood Bridge team (including the Community Task Force
and the Policy Advisory Group) developed preliminary concepts, added additional
concepts suggested by the public, reviewed concepts to make sure they met the minimum requirements for the project, eliminated concepts,
and selected a broad range of alternatives for further evaluation.
In October 2007, the Policy Advisory Group (PAG) approved five alternatives to be studied in the draft environmental
impact statement (draft EIS). After the draft EIS is completed, the preferred alternative will be chosen.
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Click on the alternatives below to see a map and description (click on the map to see a larger version).
This alternative includes a rehabilitated bridge on the Yellow Center alignment for motorized vehicles
combined with a bicycle/pedestrian bridge on a separate alignment to the north. The 39-foot cross-section for the
motorized vehicle bridge includes two 12-foot lanes with 6-foot shoulders to allow traffic to pull
over so emergency vehicles can pass through.
The bicycle/pedestrian bridge will be 23 feet wide, with
20 feet for bicycle/pedestrian use and 1.5-foot railings. Its alignment will extend from the Springwater
Trail on the east side, above the parking lot of Sellwood Riverfront Park, over the river to north of
Staff Jennings, and across Highway 43 to connect to a Riverview Cemetery access road as recommended by
the Bicycle/Pedestrian Working Group. Ramps from the bicycle/pedestrian bridge will also connect to the
Greenway Trail on the west side.
The alternative incorporates a roundabout interchange for connection
to Highway 43 because the separated bridges remove conflicts between free flow vehicle movements and
bicycle/pedestrian movements. Right of Way maps for the
east and west sides of the river
( north
and south of the bridge) have been created for the draft EIS.
The two bridge types that will be studied for the new bicycle/pedestrian bridge in the draft EIS
(the existing bridge will be rehabilitated for automobiles so a bridge type selection was not needed):
Moderately priced Bridge Type: Stress-Ribbon
Higher-priced Bridge Type: Cable-Stayed
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Click on the picture below to see a larger PDF version.
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This alternative is a 57-foot wide cross-section on the Yellow Center alignment, including two 11-foot lanes, two 5-foot
shoulders/bicycle lanes, and two 10-foot sidewalks. It is paired with the roundabout interchange to provide a comparison
of operations in a roundabout with and without bicycle/pedestrian movements (between Alternatives A and B).
Right of Way maps for the east
and west sides of the river ( north
and south of the bridge) have been created for the draft EIS.
This alternative will be evaluated with a detour bridge north of the bridge, as well as with and without a Phase II seismic retrofit.
This alternative would rehabilitate the existing bridge, so no bridge type choice was required.
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Click on the picture below to see a larger PDF version.
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This alternative includes a double-deck bridge replacement on the Yellow Center alignment. The 45-foot cross-section
on the upper deck for motorized vehicles includes three 12-foot lanes with 3-foot shoulders (the minimum width in
American Association of State Highway and Transportation Officials guidance). The lower deck will provide a 20-foot
shared use path for bicycles and pedestrians. It is paired with the trumpet interchange because this alternative also
separates bicycles and pedestrians from the interchange and avoids conflicts with free flow vehicle movements.
Right of Way maps for the east
and west sides of the river ( north
and south of the bridge)
have been created for the draft EIS.
This alternative will be evaluated with and without a detour bridge to the north.
The following bridge type will be studied for the double-deck bridge in the draft EIS:
Higher-priced Bridge Type: Through Arch
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Click on the picture below to see a larger PDF version.
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This alternative is a 64-foot wide cross-section on the Yellow South alignment, including two 12-foot lanes, 6-foot
shoulders/bicycle lanes, and 12-foot sidewalks. It is paired with the signalized intersection.
Right of Way maps for the east
and west sides of the river ( north
and south of the bridge)
have been created for the draft EIS.
This alternative will be evaluated for staged construction to maintain traffic across the river during construction.
The two bridge types that will be studied for this alternative in the draft EIS:
Moderately priced Bridge Type: Delta Frame
Higher-priced Bridge Type: Deck Arch
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Click on the picture below to see a larger PDF version.
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This alternative includes a 75-foot wide cross section on the Pink/Teal hybrid alignment. The cross-section is
comprised of two 12-foot travel lanes for cars and trucks and two 12-foot lanes dedicated for transit vehicles
combined with an 8-foot shared use path on one side and a 16-foot shared use path on the other side. It is
paired with the signalized intersection.
Right of Way maps for the east
and west sides of the river ( north
and south of the bridge)
have been created for the draft EIS.
The two bridge types that will be studied for this alternative in the draft EIS:
Moderately priced Bridge Type: Box Girder
Higher-priced Bridge Type: Through Arch
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Click on the picture below to see a larger PDF version.
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