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Heather Elmer, Executive Director Keely Davidson-Bennett, Senior Project Manager
Chagrin River Watershed Partners
Great Lakes Green Infrastructure Conference May 31, 2017
Model Watershed Protection Ordinances Incentivizing Green
Infrastructure
Chagrin Watershed – 264 square miles – Four counties – State Scenic River – Native brook trout – High quality streams
www.crwp.org
Auburn Township Mantua Township Aurora Mayfield Heights Bainbridge Township Mayfield Village Bentleyville Mentor Chagrin Falls Township Moreland Hills Chagrin Falls Village Munson Township Chardon Newbury Township Chardon Township Orange Village Cleveland Metroparks Pepper Pike
Eastlake Russell Township
Gates Mills Solon Geauga Park District South Russell Hunting Valley Waite Hill Kirtland Wickliffe Kirtland Hills Willoughby Lake County Willoughby Hills Lake Metroparks Woodmere
2017 Members
Collaborating for a Healthy Lake Erie
CRWP Sponsors
CRWP Sponsors
www.crwp.org
Services o Development plan review o Model code adoption and implementation o Landowner assistance o Open space & stormwater projects o Training for professionals and local officials o Watershed planning o Stormwater retrofits o Dam removal and stream restoration o Stormwater research and monitoring
www.crwp.org
Why Green Infrastructure?
• Reduces stress to gray infrastructure
• Dual function - stormwater and usable area
• Capital cost savings for new development
• Adds property value
www.crwp.org Chagrin River Watershed Partners, Inc.
Model Codes Riparian setbacks Wetland setbacks Comprehensive
stormwater Erosion & sediment
control Conservation
development Other natural resource
codes (floodplain, steep hillside protection, etc.)
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Riparian areas, streams & wetlands…..
Sinks for storm water and its
pollutants
Free flood and erosion control &
water quality protection
Hunting Valley
Chardon
Setback zoning is a tool
to maintain these services as land is
developed.
Model Riparian Setback Code
• Zoning tool to limit development within specific distances of streams and maintain services of riparian areas
• Developed with regional and national technical advisors
• Details permitted & prohibited structures and uses, non-conformities, and variances
• Include provisions to examine combined impact of all setbacks on a subdivision or parcel
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• 25 foot setback for streams
draining < 0.5 mi2
• 75 foot setback for streams draining 0.5 – 20 mi2
• 120 foot setback for streams draining 20 – 300 mi2
• Extend to 100 year floodplain
and wetlands within setback
www.crwp.org Chagrin River Watershed Partners, Inc.
Model Riparian Setback Distances
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Riparian Setbacks in Chagrin River Watershed and Ohio
• Aurora • Bainbridge Township • Bentleyville • Chagrin Falls • Hunting Valley • Kirtland • Lake County • Mantua Township • Mayfield Village • Mentor • Moreland Hills • Orange Village • Pepper Pike • Russell Township • Waite Hill (sensitive areas) • Willoughby Hills (protected areas) • Woodmere • Over 80 Ohio communities
Variances & Riparian Setbacks • Community’s existing
variance code applies
• Model prefers maintaining riparian setback over other setbacks
• Provide variances to front, side rear yard setbacks first
www.crwp.org
CRWP Site Plan Review – Supplements community review – Identify & explain relevant federal & state
regulations (i.e. Clean Water Act section 404 & 401 permits, Ohio EPA NPDES construction stormwater permit)
– Comment on relevant local codes
www.crwp.org
Riparian & Wetland Setback Assistance
– Is this a stream? – Is this a wetland? – Where is the ordinary high
water mark? – Unexpected or uncommon
permit requests – Suggestions for limiting the
need for riparian setback variances
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Griswold Creek, Russell Township
Comprehensive Stormwater Management Code
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Why use stormwater codes as tool?
• Required for many communities to meet state permit requirements
• Where TMDLs exist MS4s must consider in stormwater control selection
• Reduce costs of private development to public infrastructure
• Especially appealing for communities with aging & undersized infrastructure
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Stormwater Code Recommendations 1. Credit for stormwater controls
that reduce runoff volume 2. Stormwater management for
commercial and industrial development less than 1 acre
3. Reduce impervious area or increase infiltration of runoff on redevelopment sites
4. Soil preservation and post-construction soil restoration
5. Controls to reduce runoff temperature for sites in cold water habitat watersheds
LID Volume Reduction Credit for Peak Discharge
• Permeable pavement & bioretention reduce runoff volume – should count toward flood control
• Not crediting LID results in pond + LID -> makes LID less economically feasible
• LID offers water quality improvements & aesthetic benefits
Soil Preservation & Restoration
• Healthy soils reduce runoff • Minimize soil disturbance and
protect soil from compaction • Restore disturbed soils
– Till subsoil to 15-18” – Incorporate compost top 12” – Replace topsoil to min. 4”
depth Photo from King County , Washington
Coldwater Habitat Streams
Stormwater Controls to Protect Coldwater Habitat (CWH)
• Require stormwater controls that reduce temperature in CWH watersheds.
• Can help meet permit requirements
Photo from stormtech.com
Stormwater management for commercial and industrial development <1 acre
Especially valuable for :
• Areas largely developed before stormwater management required
• Areas with urban flooding problems
All of these outparcels are < 1 acre
Early Adopters • Lakewood - 8,000 ft2 • Aurora – 0.5 acre of disturbance
for additions to commercial or industrial properties
• Mentor and Willoughby Hills – All Commercial and Industrial Development
• Federal Government - 5,000 ft2 threshold for LID
Recently installed 14,000 ft2 CVS in Lakewood uses bioretention
Implementation Considerations
• Review building permits to determine what threshold is appropriate for your community
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Maximizing Treatment for Redevelopment
REQUIRE Impervious area reduction OR Infiltration of runoff OR Treatment of larger runoff volume
Photo from NY Times
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Model Parking Code
• Space maximums & minimums by land use
• Bicycle parking standards • Shared parking & land banking • Allow bioretention &
permeable pavement • Adopted by Mentor and
Mayfield Village
Conservation Development
• Preservation of rural character, natural resources, historical structures
• 50% recommended protected open space (40% minimum)
• Less infrastructure to maintain
• Density-neutral development or modest density bonuses
Flood Damage Reduction
• ODNR’s recommended higher standards – Fill Restrictions – Foundation Design – Compensatory Storage – 2 Foot Freeboard – Cumulative Substantial Damage/
Substantial Improvement
• More conservative than minimum NFIP standards
• Further reduces flood risk and enhances the natural benefits of floodplains
• May allow better rates on flood insurance
Thanks to our funders! • National Estuarine Research Reserve
System Science Collaborative • Ohio Lake Erie Commission’s Lake Erie
Protection Fund • Ohio Department of Natural Resources
Coastal Management Assistance Grant
Model Codes Available at www.crwp.org Click on member services
www.crwp.org
Thank you! Any Questions?
Heather Elmer, Director Keely Davidson-Bennett, Senior Project Manager
(440) 975-3870 [email protected]
Keep the Chagrin healthy today and for future generations.
Visit www.crwp.org and click on ‘support us’.
