Parking Structure Three Green Retrofit

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Parking Structure Three Green Retrofit

• Andrea Camp
• Erik Lenhart
• Erin Qureshi
• Ryan Shojinaga
• Tim Watson

CEE-454 Urban Transportation Systems December 1,
2004
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Project Objective

• To identify a transportation facility in the
  Portland State University neighborhood to modify
  for an environmental benefit.

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Facility Selection

• PSUs Parking Structure 3 was chosen for a
  green re-design to decrease the environmental
  impacts of the building.

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Methodology

• Brainstorm for alternatives
• Identify most plausible alternatives
• Research alternatives implementation costs
• Determine alternatives environmental storm water
  runoff reduction
• Examine alternatives pollution reduction, flow
  control, and destination/disposal

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Alternatives

• Eco-roof on new roof structure
• South end vegetated catch basin
• East and west side permeable sidewalks and
  flow-through planters

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1. Ecoroof

• Layers of impermeable membrane, gravel, soil mix,
  plants
• Deep drainage basins for additional water
  capturing and storage
• Additional construction required new roof
  structure added to existing building
• No parking lost

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1. Ecoroof
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2. South end vegetated catch basin

• A large, rectangular ground-level area for a
  variety of biological life
• Diverse native plant species dry and wet
  habitats
• Requires removal of university-owned materials
  stored on site
• No parking removed

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2. South end vegetated catch basin
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3. Permeable sidewalks and planters

• Re-construction of sidewalks around building with
  permeable concrete
• Ground-level planters along east and west sides
  of existing building
• No parking removed

Image http//www.portlandonline.com/shared/cfm/i
mage.cfm?id55791
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3. Sidewalks and Planters
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Alternative Costs Benefits
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Determination

• The alternatives cost-benefit analyses result
  in Alternative 2 reducing the most storm-water
  per dollar spent.

Western red cedar, a vegetated catch basin plant
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Conclusions

• The vegetated catch basin, Alternative 2, is the
  least expensive and reduces runoff from building
  by 100.
• The sidewalk/planter plan, Alternative 3, is the
  least invasive and reduces 40 of runoff.
• A retrofit to the parking structure would reduce
  strain on the municipal storm water system, thus
  saving money and reducing potential for runoff
  entering rivers and streams.
• Implementation of green design original
  building construction is less costly than site
  retrofit projects.

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The End

• Any Questions?