Upload
others
View
0
Download
0
Embed Size (px)
Citation preview
LOW IMPACT DEVELOPMENT CONFERENCE LOW IMPACT DEVELOPMENT CONFERENCE NEW CHALLENGE: A CLIMATE FOR CHANGENEW CHALLENGE: A CLIMATE FOR CHANGE
09.28.201009.28.2010
CASE STUDY: WALNUT GROVE, BRAMPTONCASE STUDY: WALNUT GROVE, BRAMPTONA BUILDERA BUILDER’’S PERSPECTIVE OF LOW IMPACT DEVELOPMENTS PERSPECTIVE OF LOW IMPACT DEVELOPMENT
THE SITETHE SITE
CREDIT VALLEY SECONDARY PLAN AREA 45CREDIT VALLEY SECONDARY PLAN AREA 45--66
SITE AREA = 5.6 haSITE AREA = 5.6 ha
EXISTING RESIDENTIAL AND VACANT GREENHOUSEEXISTING RESIDENTIAL AND VACANT GREENHOUSE
BORDERED BY DEVELOPMENT BLOCKSBORDERED BY DEVELOPMENT BLOCKS
MODIFIED BLOCK PLAN PROCESSMODIFIED BLOCK PLAN PROCESS--NO OVERALL ENVIRONMENTAL IMPLEMENTATION NO OVERALL ENVIRONMENTAL IMPLEMENTATION REPORTREPORT
ONLY LANDS CURRENTLY ANTICIPATED FOR DEVELOPMENTONLY LANDS CURRENTLY ANTICIPATED FOR DEVELOPMENT
TRIBUTARY TO CREDIT RIVER AND TRIBUTARY 8b.TRIBUTARY TO CREDIT RIVER AND TRIBUTARY 8b.
NO EXTERNAL DRAINAGE TO SITE NO EXTERNAL DRAINAGE TO SITE --SANDY SOIL LAYERS AND SILTY CLAY TILLSANDY SOIL LAYERS AND SILTY CLAY TILL
GENERAL RECHARGE FUNCTIONGENERAL RECHARGE FUNCTION-- AVERAGE ANNUAL INFILTRATION = 150mmAVERAGE ANNUAL INFILTRATION = 150mm
APPLICABLE APPLICABLE CRITERIACRITERIA
PROPOSED PROPOSED DEVELOPMENTDEVELOPMENT
PROCESSPROCESS
LOW IMPACT LOW IMPACT DEVELOPMENT DEVELOPMENT
SCREENINGSCREENING
RAINWATER HARVESTING RAINWATER HARVESTING
(BARRELS OR CISTERNS)(BARRELS OR CISTERNS)GREEN ROOFSGREEN ROOFS DOWNSPOUT DISCONNECTS / DOWNSPOUT DISCONNECTS /
INCREASED TOPSOILINCREASED TOPSOILSOAKAWAY PITSSOAKAWAY PITS BIORETENTION GARDENS/BIORETENTION GARDENS/
STORMWATER TREE CLUSTERSSTORMWATER TREE CLUSTERS
PERMEABLE PAVEMENTPERMEABLE PAVEMENT VEGETATED FILTER STRIPSVEGETATED FILTER STRIPS SOIL AMENDMENTSSOIL AMENDMENTS DRY SWALESDRY SWALES GRASS SWALESGRASS SWALES
SCREENING VIA SCREENING VIA LID MATRIXLID MATRIXTO IDENTIFY MEASURES APPLICABLE TO SITE CHARACTERISTICSTO IDENTIFY MEASURES APPLICABLE TO SITE CHARACTERISTICS
MODIFIED CROSS SECTIONMODIFIED CROSS SECTION
SELECTED SELECTED MEASURES MEASURES
(PUBLIC + PRIVATE)(PUBLIC + PRIVATE)
EAST HALF OF SITE EAST HALF OF SITE DRAINS TO BIOSWALEDRAINS TO BIOSWALE
WEST HALF OF SITE WEST HALF OF SITE DRAINS TO ROW DRAINS TO ROW INFILTRATION TRENCHINFILTRATION TRENCH
STANDARD RIGHT OF WAY MODIFIED WITH INFILTRATION TRENCHSTANDARD RIGHT OF WAY MODIFIED WITH INFILTRATION TRENCH
THE COSTSTHE COSTS
TRADITIONAL versus TRADITIONAL versus LOW IMPACT DEVELOPMENTLOW IMPACT DEVELOPMENT
THE DEVELOPERSTHE DEVELOPERS’’SSPERSPECTIVEPERSPECTIVE
There is a place at the There is a place at the forefront of home design forefront of home design that other developers strive that other developers strive
to reach. Our goal is to to reach. Our goal is to always be a step ahead of always be a step ahead of the rest of the industry with the rest of the industry with
the newest products, the newest products, cutting edge technology cutting edge technology
and intelligent, practical and intelligent, practical touches touches …… in every home in every home
we build. Because, we we build. Because, we know you're ahead of the know you're ahead of the
curve, and we're right there curve, and we're right there for you.for you.
some of our neighbourhoods some of our neighbourhoods ……
What does LID represent from What does LID represent from a developers perspective?a developers perspective?
effective management of stormwater effective management of stormwater runoff initiatives / directives within our runoff initiatives / directives within our communitiescommunities
having a direct impact on stormwater having a direct impact on stormwater properties and the amount of runoff that properties and the amount of runoff that enters our water systems enters our water systems -- treatmenttreatment
benefits in overall community design benefits in overall community design ––form versus functionform versus function
but LID also represents but LID also represents ……
L I D
logisticalindecisive
device
lengthy important decision
liability inventive debacle
logical inexperienced disaster
leading innovative dollars
WHY LID? WHY LID? MAKING THE MAKING THE DECISION DECISION ……
site story + the evolution of stormwater managementsite story + the evolution of stormwater management
further reduce our impact
changing climate
infrastructure deficit
decentralization
passive versus active
design longevity
design integration
resource conservation
increased costs versus increased revenue: increased costs versus increased revenue: the business casethe business case
COST CONSIDERATIONSCOST CONSIDERATIONS
agency approvalsagency approvals
knowledgeable consultantsknowledgeable consultants
special construction methods for LID special construction methods for LID measuresmeasures
sourcing suitable products/materialssourcing suitable products/materials
experienced contractorsexperienced contractors
operations and maintenance programoperations and maintenance program
monitoring and performance evaluationmonitoring and performance evaluation
replacement/repairsreplacement/repairs
corporate identity corporate identity –– a green a green technology platformtechnology platform
LID sales and marketing strategyLID sales and marketing strategy
Area specific enhancements versus lot premiums
Upgraded features as standards (e.g. permeable driveways)
Additional options and upgrades (e.g. landscape materials, exterior design packages, optional loggias) … generation of revenue
industry responseindustry response
INCENTIVESINCENTIVES
government and government and agency supportagency support
partnership partnership benefitsbenefits
industry supportindustry support
CHALLENGESCHALLENGES
Corporate responsibility and low impact developmentCorporate responsibility and low impact development
Operations and maintenance requirementsOperations and maintenance requirements
Easements and accessibilityEasements and accessibility
Posting of securities and certificationPosting of securities and certification
Attaining final assumption of LID featuresAttaining final assumption of LID features
““ Do as I say, not as I do Do as I say, not as I do …”…”
taking a leap of faith taking a leap of faith …… the unknownsthe unknowns
uncertainty with future responsibility
entering contracts
operations and maintenance of LID initiatives