Promoting Low Impact Development - utct.org Page/Promoting Low... · WHY LOW IMPACT DEVELOPMENT? -...
Transcript of Promoting Low Impact Development - utct.org Page/Promoting Low... · WHY LOW IMPACT DEVELOPMENT? -...
Promoting Low Impact DevelopmentSustainable Stormwater Management
Anthony Kendrick, ENV SP
Director, Green Infrastructure
Design I Protect I Sustain
I
Stormwater
Low Impact Development
• Exceeds Local Water Quality Requirements
• Eases Burden on Support Entities
• Prevents Downstream Erosion
• Mitigates Flash Flooding
• Aesthetically Appealing
• Mimics Nature
• Absorbs Greenhouse Gasses
• Solves Tough Engineering Challenges
But Do Developers Care?
Why Should Developers Care?
The Golden Circle
WHY
HOW
WHAT Deliverables
Beliefs
Vision
HOW
WHAT
“We Sell Great Computers at a Competitive Price"
HOW
WHAT
"In everything we do, we believe in challenging the status quo"
We Must Start With WHY
But Do Developers Care?
Developers Don’t Care About What The Deliverables Are…
But Do Developers Care?
…Not At First
But Do Developers Care?
But Yet That’s All We Talk About
But Do Developers Care?
Developers Don’t Care About How You Do It…
But Do Developers Care?
Developers Primarily Care About WHY They Should Do It…
WHY Low Impact Development
• Increased Lot Yield
• Lower Overall Cost of Development
• Increased Revenue
• No Design Delays / No Construction
Delays
LID WHY
“To Provide Developers With an Ecologically SustainableWater Management Solution That Positively Impacts Their Bottom Line; Through Creativity, Innovation &
Collaboration, Together We Can Build a Future”
Story Telling WHY
Birnamwood Drive – Harris County
WHY LOW IMPACT DEVELOPMENT?
- Reduced Construction Costs- Reduced Maintenance Costs- Safety- Practice What We Preach- Proof of Concept
Birnamwood Drive – Economics
1-Mile Long 4 lane Concrete Boulevard with Median
Traditional (estimated) LID (actual)
Site Prep & Earthwork $391,634.00 $449,060.00
Drainage $400,000.00 $288,432.00
SWPPP $69,600.00 $87,000.00
Landscape Planting $30,000.00 $66,140.00
Landscpe warranty/Maint $0.00 $34,630.00
Bridge $208,517.00 $208,517.00
Subgrade & Paving $1,139,791.00 $1,139,791.00
Traffic $9,000.00 $9,000.00
Signing & Striping $25,461.00 $25,461.00
Traffic Signal $128,010.00 $128,010.00
Utilities $16,140.00 $16,140.00
Extra Work Items $15,650.00 $36,650.00
Biofiltration System $0.00 $132,931.00
SWQ System $30,000.00 $0.00
Detention Basin $350,000.00 $0.00
Total $2,813,803.00 $2,621,762.00
estimated cost benefit: $192,041.00 7% Cost Reduction Per Mile
Easton Commons – New Quest Property
WHY LOW IMPACT DEVELOPMENT?
- Economics- Economics- Economics- Economics- Economics- Economics- Economics
Easton Commons – Economics
WHY LOW IMPACT DEVELOPMENT?
- Economics- Economics- Economics- Economics- Economics- Economics- Economics
Underground Detention:Required Storage – 27,950 CFCost Per CF - $9.50 to $12.00 CF
Cost of System - $280,000
Easton Commons – Economics
Easton Commons – Economics
Queenston Manor Apartments –
Academy Development Corp.
WHY LOW IMPACT DEVELOPMENT?
- Economics- Aesthetics- Maintenance
Queenston Manor Apartments - Economics
• Biofiltration
• Underground storage
•Pervious pavement (parking)
• Bioswales
Queenston Manor Apartments - Economics
Queenston Manor Apartments - Economics
Hard Costs
• 7 Acres @ .35 ACFT/AC = 106,000 CF
Integrated Design Approach
• 43,560 SF Porous Pavers @ $12 SF = $522,720 (-$217,800) = $304,920
• 21,000CF UG Detention / Drainage @ $6 = $126,000 (-$50,000)= $76,000
• 600 SF Biofiltration System @ $100 SF = $60.000
• 50,000 CF @ $.50 CF (Bioswale Excavation & Hauloff) = $25,000
• 2,500 SY Sod @ $1.30SY = $3,250
Total Cost = $469,170
Opportunity Seized – ROI = 10 Months
Queenston Manor Apartments - Economics
Maple Court – Palt, Inc
WHY LOW IMPACT DEVELOPMENT?
- Economics- Aesthetics
Maple Court – Palt, Inc
Maple Court – Palt, Inc
HOW - Beliefs
“We must be disciplined in our core values”
Having a Clear Message in HOW
“Low Impact Development”
“Green Infrastructure”
“Multifunctional Design”
The Future is Multifunctional
• Pavements
• Landscapes
• Drainage
• Rooftops
What’s The Cost Per Square Foot?
What’s The REAL Cost Per Square Foot?
Mimic Predevelopment Hydrology
Would Multifunctional Design…
Time of Flow to Outlet = 3 Minutes Time of Flow to Outlet = 15 Minutes
Slow It Down, Spread It Out, Soak It In
Convey It
Filter It, (Harvest It?) & Let It Go
Resilient Design
Site
Overflow
High Performance
Engineered Filter
LID Elements
Bio-swales: 3 Units
Volume=125,000 CuFt
HPMBS Area = 330 SF
Wetland Pond Storage
Resilient Design
Resilient Design – Tax Day > 16”
Resilient Design– Harvey > 29”
Resilient Design– Harvey > 29”
Resilient Design– Harvey > 29”
HOW - Beliefs
“We must be disciplined in our core values”
WHY LID
HOW
WHAT
What - Deliverables
“We must be consistent in our deliverables”
Delivering on a Promise
• Verify Performance
• Understand Maintenance Requirements
• Be Clear About Maintenance Budget
• Discuss Life-Cycle Costs
• Keep It As Simple As Possible
• Have a Post Construction Plan / Budget
Silt Happens
Silt Happens
Performance Verification
Performance Verification
Performance Verification
Maintenance Requirements
Maintenance Requirements
Maintenance Requirements
Maintenance Requirements
Performance Dictates Maintenance
Planting Dictates Maintenance
Planting Dictates Maintenance
Post Construction Plan
WHY
HOW
WHAT
Delivering on a Promise
• Verify Performance
• Understand Maintenance Requirements
• Be Clear About Maintenance Budget
• Discuss Life-Cycle Costs
• Keep It As Simple As Possible
• Have a Post Construction Plan / Budget
Questions?
Anthony Kendrick, ENV SPDirector, Green Infrastructurewww.ecosvs.com214.701.2117
THANK YOU!