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Transcript of Green Streets
Green streets manage stormwater in ways that minimize runoff and improve water quality.
when it rains....
Then, it floods.
Permeability affects peak stream flow.
Streams degrade, erode.
Suspended sediment settles, pollutes
full-circle in one career
Then: Rainfall runoff to river WARP speed.
Now: Rainfall to groundwater or vapor ASAP.
Shave peak flows
Green Street Concepts
Jim Hegarty, P.E.
Jason Washler, P.E.
Trees and Stormwater
Large tree “eats” 100 gallons a day
Some codes allow impervious runoff credits for trees.
Deforestation in Muskegon Watershed changed river over 100 years
Jim Hegarty, P.E. firstname.lastname@example.org
Jason Washler, P.E. email@example.com
Case Study: Plainfield Avenue
Private Funds: $152,220
City Funds: $30,000
MDOT Enhancement Grant: $146,667
Construction Cost: $298,887
Maintenance Fund: $30,000
Total Project: $328,887
Plainfield Avenue, Grand Rapids, MI
Lake Street, Whitehall, MI
Lafayette Street, Ionia, MI
Why Permeable Pavements in Ionia?
Freeze/Thaw, Clogging, Raveling
Avoid sand/salt ice treatment
Avoid leaf pick-up
Recommend annual vacuum sweeping
NMRCA Permeable Concrete Contractor Certification program
Mix design critical
Single sized aggregate
15-25% void ratio
30% - 50% more than non-reinforced concrete
$45 - $55 per SYD
Only need to cover 25% to 35% to be effective
History of Concrete Pavement
International Joint Commission listed White Lake as an AOC
First Remedial Action Plan created
White Lake PAC and Muskegon Conservation District developed White Lake Community Action Plan
Municipal and industrial waste discharge
Identified untreated runoff released during first 0.5-0.75” of precipitation as major contributor
Official update to 1995 RAP
Foster continued public interest
Total Suspended Solids (TSS) – 90%
Metals – 95%
Phosphorous – 80%
Nitrogen – 70%
Ammonium – 70%
Organics – 90%
Bacteria – 90%
Delisting of BUI’s
City of Whitehall
Muskegon Conservation District
Letters of Support
US and State Legislators
White Lake Public Advisory Council
City of Montague
White Lake Area Chamber of Commerce
Michigan’s Lt. Governor John Cherry, Jr.
WMRSC and many others
Construction Total = $950,000
EPA Great Lakes Restoration Initiative - $380,000
Whitehall Utility Funds - $300,000
Whitehall TIFA - $390,000
Alcoa Foundation - $40,000