North Meck Recycle Center
Bio-Retention & Recycling
“Redefining Storm Water”
In
Mecklenburg County
Presented by: David Woodie, PE, CPSWQ
Project Manager, Charlotte-Mecklenburg Storm Water Services
http://stormwater.charmeck.org
WATERSHED / BASINS
• 330± miles of FEMA
streams
• 32 watersheds
• All water in
Mecklenburg County
(except Catawba River)
originates in
Mecklenburg County
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What is L.I.D. ?
Where can I get it?
What does it do?
Where does it go?
What Size Do I need?
How Much will it Cost?
It Depends!
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What’s Going On?
Education
Ordinances
New Construction
Redevelopment
Retrofits
Restoration
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L.I.D. Site Planning
Concepts
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Hydrologic Response of
Conventional BMPs
Higher Peak
More Volume
Earlier
Tc
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Neo-Traditional
Development
Requires:
Flat topography
Grid street pattern
Mass Clearing
Mass Grading
HIGH
IMPACT
DEVELOPMENT
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Small Lots
Slab-on-Grade Homes
Separate Garages
Alleys
No Cul-de-Sacs
25% More Impervious
Clear Cutting & Tree Save
Mass Grading
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How Is LID Used?
Rain Gardens In Multi-Family Residential
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Rain Gardens in
“Bump-outs”
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Meck. Co. Office
Hal Marshal Building, 1 acre Parking Lot
Monitored by NCSU
60% Phos. Removal
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McDowell WATERSHED
McDowell
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Waters of Mecklenburg
Lake Norman
Mountain Island Lake
Lake Wiley
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Where did it go?
Stream Banks
Disappear
Stream Banks
Re-Appear
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Here it is!
McDowell Creek
draining to
Mtn Island Lake
along the
Catawba River.
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Northcross Shopping Center
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Northcross Shopping Center
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Northcross Shopping Center, McDowell
Ck BMP Project.
Helping to achieve water quality one
Rain Garden at a time.
- 56 Acres of
impervious Area,
No storm water
control devices.
- 1.6 million
gallons of storm
water runoff
from a 1 inch
rain storm.
- Draining to
McDowell Creek,
Mtn. Island Lake,
drinking water
supply.
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Northcross Drainage Areas
10 Rain Gardens
146 Parking Spaces
14 Acres Treated!
25% Treated!!
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Rain Garden Section
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Rain Garden Section
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Northcross Shopping Center
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North Meck Recycle Center
5 acres of
Impervious
Continuous
Slope to SW.
Concentrated
flow, two
discharge pts
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Final Design Approved
Three drainage
areas.
Three basins.
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Final Design Approved
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Final Design Approved
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Work Begins
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Construction
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Construction
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Back Fill
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Bermuda 419
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Observation
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Visual Results
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Alive and Well
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Construction
drains.
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Stream Restoration with LID
Westfield
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Hidden Valley
Wetlands
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West Field Construction
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Level Spreader
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Level Spreader
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Drainage Area
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Level Spreader
Mosquitoes
Issues:
Low Infiltration
Poor Soils
Standing Water
Back Water
Maintenance?
Vegetation?
Community!!
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Design / Re-Design
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Grand Opening
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In Action
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24 hours later, Dry!
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Success!!
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Summary.
1. LID is a key component to both water quality and volume.
2. Retrofits can be accomplished and should be considered.
3. Maintenance is key to long term success.
4. Do your home work.
5. Learn from past mistakes.
6. Think outside the box!
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Ask Away.
Questions?
David Woodie, PE, CPSWQ
Thank You!
Visit Our Website.
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