Tackling Barriers to Green Infrastructure One Code at a Time · If the code language is not clear...
Transcript of Tackling Barriers to Green Infrastructure One Code at a Time · If the code language is not clear...
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Tackling Barriers to Green Infrastructure One Code at a Time
Julia Noordyk Water Quality Outreach Specialist Wisconsin Sea Grant@NoordCoast
Credits: Juli Beth Hinds Birchline Planning, LLCKate Morgan Milwaukee Metropolitan Sewerage District
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Underwater video of an urban stormwater outfall
West Seattle diving footage by Laura James (www.tox-ick.org)
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Rain Gardens and Bioretention
Green Infrastructure
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Permeable Pavements and Pavers
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Planter Boxes
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Green Walls
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Green Roofs
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Stormwater Trees
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Native and Deep Rooted Plants
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Restored Floodplains
and Wetland Basins
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Why are Codes & Ordinances important for Green Infrastructure?
“The building code doesn’t allow a LEGO chimney on a Lincoln Log cabin.”
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Emerging and evolving needs & issues
Stormwater permit updates
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Rainfall Estimates June 16-17, 2018Credit: MNNPR News, National Weather Service
Intense storm events
Emerging and evolving needs & issues
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Emerging and evolving needs & issues
Environmental Protection AgencyTotal Maximum Daily Loads (TMDLs)
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Emerging and evolving needs & issues
Changing technical standards
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Emerging and evolving needs & issues
PaveDrain
New products & technology
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And Finally: The Discretion & Decider Barriers
WHO’S IN CHARGE HERE?!
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The charismatic leader, “Make it so!”
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Discretionary approval needed…
“The applicant shall incorporate the comments of the…”
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Aesthetic Habits
“Because we’ve always done it that way.”
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When no one is deciding
What’s missing here?
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“I heard it failed in…”
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So what? We comply with the state stormwater standards….
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If the code language is not clear that green infrastructure is an acceptable or preferred approach to managing stormwater, green infrastructure will not likely be considered in development proposals, design plans or capital projects.
Why are Codes and Ordinances Important?
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It’s not about more regulation or cost!
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Photo: Kuglin/AP
Do codes actually matter?
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Code Revision: Encouraging use of bioretention areas with curb
cut inlets as parking lot landscaping
24.12.020 Perimeter Vehicular Use Area Landscaping and
24.12.030 Interior Vehicular Use Area Landscaping
The integration of depressed bioretention areas used for landscaping and
stormwater management is are strongly encouraged. Where perimeter
areas are designed specifically for stormwater management, the planting
and dimensional requirements of 24.12.020(B)(1) above may be varied as
necessary to ensure that the area functions effectively for stormwater
treatment, so long as in the judgment of the [plan commission, city
engineer] an equivalent amount of landscaping, planting or screening is
provided.
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46% runoff volume reduction
59% total suspended solids reduction
What’s the Impact: New Standards For Parking Lot Landscaping
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Code Revision: Encourage use of natives in lawn areas and
limit total percent of site in turf grass
CODE OF ORDINANCES
Chapter 122 – ZONING
7. Landscaping. A general description of landscaping standards, screening,
and parking lot treatments. Naturalized landscaping, the use of native
vegetation, preservation of existing trees and wooded area, and tree
planting that will provide additional tree canopy on the site are
encouraged. The use of turfgrass should be limited to those areas
intended for outdoor recreation or gathering areas.
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74% runoff volume reduction
64% total suspended solids reduction
What’s the Impact: Substituting Deep Rooted Plantings for Turf
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…Yes, codes matter and we can do better!
www.seagrant.wisc.edu/greeninfrastructure
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What makes this audit unique?
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One code to rule them all….
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Natural Assets?
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Stormwater Permit?
Pollution Limit?(e.g., TMDLs)
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Hazards?
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Community Identity and Character?
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Green Infrastructure
Usage?
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Acceptance?
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Down in the weeds
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Nuanced Code Ranking
GI
practice
clearly
allowed
and
approved
as-of-
right
GI
practice
allowable
but some
ambiguity
or
potential
conflict
GI
practice
allowed
with
discretion
ary
approval
GI
practice
mentioned
but w/o
standards
or
guidance
No policy
or
standards
adopted,
but not
disallowed
Limitations
or
prohibitive
language,
but could
potentially
be
approved
GI
practice
prohibited
or
prevented
by
conflicting
code
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Permeable Materials
1 2 9876543
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✓ARCHITECTURAL DESIGN STANDARDS
✓COASTAL COMMUNITIES
✓COMMUNITY OUTREACH AND EDUCATION
✓CONSTRUCTION AND POST-CONSTRUCTION MANAGEMENT
✓LANDSCAPING
✓PARKING
✓PERMEABLE MATERIALS
✓POLLUTANT REDUCTION THROUGH SITE PLAN REVIEW
✓POST-CONSTRUCTION STORMWATER STANDARDS AND LONG-TERM MAINTENANCE
✓PUBLIC WORKS STANDARDS
✓PURPOSE STATEMENTS AND COMMUNITY PLANS
✓SANITARY AND STORM SEWER DISCONNECTIONS
✓STORMWATER MANAGEMENT STANDARDS
✓SUBDIVISIONS AND NEW “GREENFIELD” DEVELOPMENT
✓ZONING
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Nuanced Code Ranking
Juli Beth Hinds,
Birchline Planning, LLC
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Landscaping
Audit Question Type of Barrier Tips Grade
Is the use of deep-
rooted or native plants,
plants with habitat
value, or edibles
allowed or encouraged
in the landscaping
standards?
Landscape
standards
Design guidelines
Explicitly listing
desired types of
landscaping in
the regulations
tells site planners
up front that the
community
encourages these
types of
plantings.
A-
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“How do I choose?!”
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What code changes will meet the community’s goals?
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Current and future development?
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No Near-term Development or Redevelopment?
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TBD….
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Julia NoordykWater Quality SpecialistUW Sea [email protected]
Thank you!
www.seagrant.wisc.edu/greeninfrastructure