watershed management & low impact development for litchfield board of realtors green committee...
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Watershed Management & Low Impact Development
for Litchfield Board of Realtors
Green Committee
DEP / Watershed, Lakes and NPS ProgramsMaryAnn Nusom Haverstock
Thursday, May 7, 2009
Watershed Management and Low Impact Development
LOW IMPACT DEVELOPMENT
LID is a site design strategy intended to maintain or replicate predevelopment hydrology through the use of small-scale controls integrated throughout the site to manage runoff as close to its source as possible. (2004 CT-DEP Stormwater Quality Manual)
Low Impact Development (LID)
• LID can be incorporated into many residential and municipal areas to assist in environmental and engineering benefits.– Parking– Landscaping– Residential and Municipal Site planning– Municipal road design
How to I.D. your L.I.D.
• LID design strategies can include:– Residential rain gardens– Shared driveways– Alternative pavement surface including permeable pavers– Zero lot line setback– Reduced front setback– Stormwater disconnects
– Reduction in road width– Elimination of curb and gutter– One-way cul-de-sac– Depressed island (bioretention) in cul-de-sac– Swales in right of way– Elimination of sidewalks
Watersheds in Connecticut
Jordan Cove Urban Watershed Sec. 319 National Monitoring
Program
Treatment Watersheds
Best Management Practices (BMPs)
Grassed Swale
Rain garden
Permeable pavers Bioretention cul-de-sac
Jordan CoveRecommendations Planning and Post-construction
• Cluster design – reduces imperviousness• LID ordinance – needed because of waivers• Stormwater disconnects (reducing effective imperviousness of the
site/subdivision)
• Education – social scientist addition to team• Bioretention maintenance• Paver maintenance• Turf dam (build up along paver road edges)• Fire hydrant (maintenance cleaning caused paver road washout
problems)• Seed mix (low nutrient input varieties)
Jordan Cove Project Funded in part by the CT DEP through a US EPA nonpoint source grant under § 319 Clean Water Act
For more information, visit www.jordancove.uconn.edu
Rain Gardens
Coventry Town Hall Annex Building – Coventry, CT
Photo: TRBP
Rain Gardens
Jordan Cove Urban Watershed Project – Waterford, CT
Photo: CT DEP
Rain Gardens
UConn Storrs Campus – Mansfield, CT
Photo: CT DEP
Bioretention Areas
Evergreen Walk Mall Parking Lot – South Windsor, CT
Photo: CT NEMO
Bioretention Areas
Jordan Cove Urban Watershed Project – Waterford, CT
Photo: CT DEP
Permeable Block Pavers
Hole in the Wall Parking Lot – East Lyme, CT
Photo: CT DEP
Permeable Block Pavers
Hole in the Wall Parking Lot – East Lyme, CT
Photo: CT DEP
Permeable Block Pavers
Hole in the Wall Parking Lot – East Lyme, CT
Photo: CT DEP
Permeable Concrete Block Pavers
Hole in the Wall Parking Lot – East Lyme, CT
Photo: CT DEP
Plastic Grid Pavers
West Farms Mall Overflow Parking Lot – Farmington, CT
Photo: CT NEMO
Green Roofs
Middlesex Extension Center Demonstration – Haddam, CT
Photo: CT DEP
Green Roofs
Centerbrook Architects Building – Essex, CT
Photo: CT NEMO
Rain Barrels
Middlesex Extension Center Demonstration – Haddam, CT
Photo: CT DEP
Watershed Management List of Contacts
www.ct.gov/dep/watershed
• Program Oversight
- MaryAnn Nusom Haverstock – 424-3347• Watershed Managers
– Eric Thomas - 424-3548– Susan Peterson – 424-3854– Chris Malik – 424-3959
• Low Impact Development Coordinator– Jessica Morgan – 418-5994
• Nonpoint Source Implementation– Stan Zaremba – 424-3730
• Lakes Management– Chuck Lee – 424- 3716
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