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Green Streets

Jim Hegarty and Jason Washler
by

Prein & Newhof

on 23 July 2013

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Transcript of Green Streets

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
!
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 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
Green Streets
Case Studies
Full transcript