LID OverviewLID Overview

Low Impact DevelopmentLow Impact Development

““Redefining Storm Water”Redefining Storm Water”InIn

Mecklenburg CountyMecklenburg County

Presented by: Presented by: David WoodieDavid Woodie, PE, CPSWQ, PE, CPSWQ

Project Manager, Charlotte-Mecklenburg Storm Water ServicesProject Manager, Charlotte-Mecklenburg Storm Water Services

WATERSHED / WATERSHED / BASINSBASINS• 330± miles of FEMA streams330± miles of FEMA streams

• 32 watersheds32 watersheds

• All water in Mecklenburg All water in Mecklenburg CountyCounty (except Catawba River)(except Catawba River) originates in Mecklenburg originates in Mecklenburg CountyCounty

McDowell Watershed ImprovementMcDowell Watershed Improvement

Stream Banks Stream Banks DisappearDisappear

SedimentSedimentAppearsAppears

What is L.I.D. ?What is L.I.D. ? Where can I get it?Where can I get it?

What Size Do I need?What Size Do I need?

How Much will it Cost?How Much will it Cost?

What does it What does it do?do?

It Depends!It Depends!

Where does it go?Where does it go?

Meck. Co. OfficeMeck. Co. OfficeHal Marshal Building, 1 acre Parking LotHal Marshal Building, 1 acre Parking Lot

Monitored by NCSUMonitored by NCSU60% Phos. Removal60% Phos. Removal

What’s Going On?What’s Going On?

EducationEducation

OrdinanceOrdinancess New New

ConstructionConstruction

RetrofitsRetrofits

RedevelopmentRedevelopment

RestorationRestoration

Rain Garden ExamplesRain Garden Examples

• North Lake Mall, 17 Rain GardensNorth Lake Mall, 17 Rain Gardens

Lake Norman HondaLake Norman Honda

RETRO-FIT RAIN GARDEN, Function

RETRO-FIT RAIN GARDEN, Function

Fills with First 1” of Rainfall “First Flush”Fills with First 1” of Rainfall “First Flush”

Excess Runoff Bypasses Rain Garden into Inlet

Excess Runoff Bypasses Rain Garden into Inlet

Rain Gardens, BMPs, & LIDRain Gardens, BMPs, & LID

Northcross Shopping CenterNorthcross Shopping Center

Focus Area 1 of McDowell CreekFocus Area 1 of McDowell Creek

Present ProjectsPresent ProjectsTotaling $ 4 millionTotaling $ 4 millionIn the works for 2008.In the works for 2008.

Northcross Shopping Center, McDowell Northcross Shopping Center, McDowell Ck BMP Project.Ck BMP Project.

- 60 Acres of 60 Acres of impervious Area, impervious Area, No storm water No storm water control devices.control devices.

- 1.63 million 1.63 million gallons of storm gallons of storm water runoff water runoff from a 1 inch from a 1 inch rain storm.rain storm.

- Draining to Draining to McDowell Creek, McDowell Creek, Mtn. Island Lake, Mtn. Island Lake, drinking water drinking water supply.supply.

Helping to achieve water quality one Rain Garden at a time.

Northcross back parkingNorthcross back parking

Northcross Shopping Center, Northcross Shopping Center, McDowell Ck BMP Project.McDowell Ck BMP Project.

- 45 Tenants,45 Tenants,- Private PropertyPrivate Property- EasementsEasements- RezoningRezoning- ApprovedApproved

- 10 Rain Gardens10 Rain Gardens- 30% treated30% treated

- Construction Construction delays 10 monthsdelays 10 months

- UtilitiesUtilities- Design changesDesign changes

Helping to achieve water quality one Rain Garden at a time.

Northcross Northcross

McDowell Ck BMP Project.McDowell Ck BMP Project.

Monteith ParkMonteith Park

McDowell Ck BMP, Monteith ParkMcDowell Ck BMP, Monteith Park

McDowell Ck BMP, Monteith ParkMcDowell Ck BMP, Monteith Park

10 Acre Drainage Area10 Acre Drainage Area45% Impervious45% Impervious

Private Developer, HOA,Private Developer, HOA,Residential Concerns, Residential Concerns, Easement AgreementsEasement AgreementsConstruction SequenceConstruction Sequence

McDowell Ck BMP, Monteith ParkMcDowell Ck BMP, Monteith Park

McDowell Ck BMP, Monteith ParkMcDowell Ck BMP, Monteith Park

McDowell Ck BMP, Monteith ParkMcDowell Ck BMP, Monteith Park

McDowell Ck BMP, Monteith ParkMcDowell Ck BMP, Monteith Park

Ange Propery Wetland Project.Ange Propery Wetland Project.

Ange Propery Wetland Project.Ange Propery Wetland Project.

Ange Propery Wetland Project.Ange Propery Wetland Project.

Looking SWLooking SWtoward the toward the stream stream confluenceconfluence

Ange Propery Wetland Project.Ange Propery Wetland Project.