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Green Streets - For Web

by Jim Hegarty, P.E. and Jason Washler, P.E. A presentation for the American Public Works Association's annual meeting. Why we need green streets for stormwater management and three Michigan case studies.
by

Prein & Newhof

on 28 May 2013

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Transcript of Green Streets - For Web

Green Streets Green streets manage stormwater in ways that minimize runoff and improve water quality. when it rains... ...it pours! Then, it floods. Permeability affects peak stream flow. Streams degrade, erode. Suspended sediment settles, pollutes Stormwater Management:
full-circle in one career Then: Rainfall runoff to river WARP speed. Now: Rainfall to groundwater or vapor ASAP. Reduce Runoff
Detain
Infiltrate
Evaporate
Evapotranspirate
Shave peak flows
Improve Quality
Settle sediments
Remove nutrients
Reduce temperature Green Street Concepts Jim Hegarty, P.E.
Jason Washler, P.E. No runoff. 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 ! Curb jumper Maintenance Issues Department of Public Works Reality: Maintenance Jim Hegarty, P.E. jhegarty@preinnewhof.com

Jason Washler, P.E. jwashler@preinnewhof.com

(616) 364-8491 Questions? Busy street
Traffic/green islands
Bioretention
Filtration
Overflow
Traffic calming
Place-making Case Study: Plainfield Avenue Funding package 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? Why not? Freeze/Thaw, Clogging, Raveling Maintenance Site specific
Avoid sand/salt ice treatment
Avoid leaf pick-up
Recommend annual vacuum sweeping Contractor Experience NMRCA Permeable Concrete Contractor Certification program
Cover immediately
Mix design critical
0 slump
Single sized aggregate
15-25% void ratio Cost 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
Intersection Designation
Steep Slopes
Aggregate Wash-out
Runoff Momentum
Downstream Flooding
Water Quality
Erosion Background International Joint Commission listed White Lake as an area of concern (AOC) 1987 2002 First Remedial Action Plan created White Lake PAC and Muskegon Conservation District developed White Lake Community Action Plan 1995 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 Removal Rates
Total Suspended Solids (TSS) – 90%
Metals – 95%
Phosphorous – 80%
Nitrogen – 70%
Ammonium – 70%
Organics – 90%
Bacteria – 90%
Delisting of BUI’s Anticipated Outcomes City of Whitehall
Muskegon Conservation District
Alcoa-Howmet
Southshore Development
V3 Companies
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 Partnerships Construction Total = $950,000
EPA Great Lakes Restoration Initiative - $380,000
Whitehall Utility Funds - $300,000
Whitehall TIFA - $390,000
Alcoa Foundation - $40,000 Funding Case Studies Intro: Why is this needed? Because...
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