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LID/Conservation DesignDeveloper Standpoint (Overview)
• Why developers tear down all the trees– Ramifications/costs
• What developers can and should do to mimic natural characteristics and hydrology of a site.
• Why developers will adopt LID principles• Obstacles; natural and man made
Timbers at Creekside-Kirkwood
Costs of Conventional Costs of Conventional Stormwater TreatmentStormwater Treatment
3 A.I.s @ $1,3003 A.I.s @ $1,300 $3,900$3,900
282’ of 12” RCP @ $18282’ of 12” RCP @ $18 $5,076$5,076
Additional Clearing & GradingAdditional Clearing & Grading $3,000$3,000
Rock ExcavationRock Excavation ????????????
TotalTotal $12,000$12,000
Costs of LID Approach
NOT $12,000!!!
Prairie Crossing outside of Chicago saved more than $4,400 per lot using LID
approaches and reinvested this money into community amenities and open space
(and gained significant lot premiums)
Blanket application of street design standards can create
excessively wide right-of-ways.
Photo Copyright 1999, Center for Watershed Protection
This photograph is an example of an open
channel.
Photo Copyright 1999, Center for Watershed Protection
Firetrucks & Ideas•Make the turnaround islands pervious with rolled curbs so trucks can drive on them if needed
•Make islands depressed so they can retain storm water (crown streets accordingly)
•Don’t allow plantings within 5 feet of street on cul-de-sac
•Don’t put a streetlight in the middle of the island
•Allow parking on only one side of street
PRINCIPLE NO. PRINCIPLE NO.
1212 Relax Setback & Relax Setback & Frontage Frontage DistancesDistances
Relax side yard Relax side yard setbacks and and allow narrower frontages to allow narrower frontages to
reduce total road length in the reduce total road length in the community. community.
Relax front setback Relax front setback requirements to minimize requirements to minimize
driveway lengths.driveway lengths.Copyright 1999 Center for Watershed Protection
Timbers at Creekside-Kirkwood
Belcher Homes
Courtesy: Wellspring Development Co.Belcher Homes
Belcher Homes
Belcher Homes
N
House footprintSolar exposure
Belcher Homes
Belcher Homes
Why developers ($$ & time) will use LID principles
• Entitling land– Green Tapping– NIMBYs
• Gain more lots
• Decreased sewer, street, grading, clearing costs
• Increased lot premiums • More perceived landscaping
• Saves trees reduce utility loads on homes higher sales price
• Embraced by municipalities
NOT THIS!!NOT THIS!!
More like this!More like this!
Or this!Or this!
ANSI 700
Released; February 5th, 2009Green Building is Codified!
Chapter #4 Site Design and Development
Belcher Homes
Conclusion
Not a linear process, integrated systems
Thank You!Matt Belcher
www.belcherhomes.com
Belcher Homes