Sustainable Site Design

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    Sustainable Site Design - Presentation Transcript

    1. The Earth Is Not Green It’s Blue
    2. Sustainable Site Design
      • What does “sustainable” mean to your community?
      • Are your site design requirements consistent with that definition?
      • Is your community getting what it wants?
    3. Sustainable Site Design
      • Six examples of projects from across the country
      • Did these projects accomplish the community’s “sustainable” goals?
      • Project was located adjacent to a cold water trout stream
      • Thermal mitigation of runoff was required
      • Ordinance prescribed one acceptable mitigation measure – infiltration
      • Soils were not conducive to infiltration, yet other measures were not allowed
      • Runoff bypassed the “infiltration” area – greatly reducing thermal mitigation
      • Annual maintenance increased – replanting due to standing water
      Storm Water
      • Project was located in high arid desert where trees do not natively grow in abundance
      • Ordinance calculations required planting 750 trees on the site
      • Irrigation system was added by the owner to ensure the trees received adequate water to grow in the high arid desert
      Landscape
      • Project was a large commuter parking lot
      • Community promoted “dark sky” principles to lower energy use
      • Ordinance required the following:
        • 2.0 footcandles (max)
        • 0.9 footcandles (min)
      • Design of 10 acre parking lot yielded the following:
        • 126 poles
        • 219 fixtures
      • That’s a lot of high pressure sodium bulbs!
      Lighting
      • Project was located in an urban area with combined sewers
      • Sewerage district encouraged disconnection of storm sewer from sanitary sewer
      • Owner wished to install a permeable pavement parking lot to infiltrate runoff
      • A variance was required because the municipal code only allowed asphalt or concrete pavement
        • This delayed the project two months
      • Plumbing ordinance required that parking lots must drain to a catch basin
      • Two catch basins were installed and connected to the combined sewer
      Storm Water
      • Project was a retail shopping center
      • Ordinance required a minimum percentage of parking lot pavement to be covered by tree canopy
      • This led to obscure island configurations and many dead (or dying) trees, because trees were planted where they wouldn’t grow
      • Good news for the local nursery!
      Landscape
      • Project was proposed on a blighted site
      • Community was promoting redevelopment
      • Owner wished to install a large green roof to offset storm water runoff and maximize developable land area
      • Ordinance would not allow any credit for a green roof and required runoff to be managed using traditional practices – pipes and ponds
      • Owner chose to build on another property in a different community
      Storm Water
    4. Sustainable Site Design
      • One final example
      • Did this project accomplish the community’s sustainable goals?
    5. Cabela’s
      • 165,000 SF of retail on a 64 acre site
        • the largest retail development to date in this specific Town
      • Retailer had a very generous landscape budget that embraced the use of natural landscape to create an outdoor image
      • Project was presented to the Town Board as a natural theme design and was embraced in concept
    6. Cabela’s
      • Current Town mathematical landscape requirements would have been absurd / impossible to enforce, and the Town acknowledged it
      • A variance request was granted for the project and the Town realized that it needed to adopt a modified ordinance to address larger sites with unique needs
    7. Cabela’s
      • As a result, the retailer has an entirely adaptive / natural landscape that does not have miles of turf that has to be mowed, fertilized, irrigated and sprayed every week
      • Trees were planted in appropriate / adequate areas where they will be able to survive
      • Snow removal will not be a problem because the parking islands have adequate space and plant types for storage
      • Long term, this aesthetic will continue to improve
      • Sustainable site design principles can be foreign and unproven, but they can be applied with great success
      • To do this, communities must lead the way , working together with innovative designers and product suppliers that are willing to keep an open mind and challenge traditional approaches
      • This starts by defining what “sustainable” means, establishing a process that reflects that definition, and allowing for flexibility and creativity
      Sustainable Site Design
    8. Sustainable Site Design
      • What does “sustainable” mean to your community?

    + Christopher HitchChristopher Hitch, 9 months ago

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    Presented by Christopher Hitch, P.E. at 2008 Commun more

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