Welcome to the Webcast • To Ask a Question – The lower left-hand corner of the screen contains a chat box. Click on the “Public” tab and type your question in the box and click on the arrow to submit it. We will try to answer as many questions as possible during the webcast. • To Answer a Poll Question – Polling questions will appear throughout the webcast. To answer a poll question, click on the radio button to the left of your answer and click submit. Webcast 3: Permeable Pavement Do not type your answer in the chat box. • To Adjust How the Slides Appear on Your Screen – On the top of your screen, click on the small down arrow next to the button that looks like . Scroll down to “Zoom” and click on “Auto Fit.” Webcast Team Welcome to the Webcast • To Complete the Webcast Survey – After the webcast, we will have a short multiple choice survey to get feedback on your experience. Please take a few minutes to fill the survey out so we can identify areas for improvement. • Continuing Education Credits – We are offering CEUs for our watershed and stormwater management webcast series. A total of 1.0 CEU can be earned for attending five webcasts. David Hirschman, CWP Only the registered attendee is eligible to earn the CEU. The registered attendee must watch the entire webcast. Email webcast@cwp.org if you are interested in earning CEUs and did not indicate this during the registration process. Two PDUs are also available for certified professionals (CPESC, David Smith, ICPI CPSWQ) for this webcast. Chuck Taylor, Ecological • Resources – After the webcast, we will email a resources Paver Systems sheet, speaker contact information, and the presentation. Kelly Collins, CWP Webcast Overview • Permeable Pavement Applications • Innovative Designs and Industry Permeable Pavement Overview Advancements and Applications • Installation and Maintenance • Lessons Learned About Permeable Pavement – Runoff Reduction & Pollutant Removal – Infiltration & Underdrains – Clogging – Cold & Dry Climates
Interlocking Concrete Permeable Pavements Pavement Differences between standard Pavements and Permeable? Permeable Interlocking Pervious Concrete Porous Asphalt Concrete Pavers (PICP) (PC) (PA) Permeable Interlocking Concrete Pavement PICP Pervious concrete Plastic Reinforced Others (XeriPave, Concrete Grid Grid Pavers Flexi-Pave) Porous asphalt Pavers (CGP) 8 Slide courtesy of David Smith, ICPI Micro Scale Applications Pavement Sizing and Design Surface Area/Contributing Drainage Area • The depth of the stone = 250 to 1,000 square feet reservoir layer (base) is set by several factors: – Structural load requirements – Underlying soil infiltration rate – Maximum drain time – Design storms stored or infiltrated • Will likely fail if not adequately designed for structural loads • Cross-section specifications Walkways, Courtyards Individual Driveway different for each kind of pavement Source: Hunt and Collins, 2008 Source: Hunt and Collins, 2008 Small Scale Applications Large Scale Applications Surface Area/Contributing Drainage Area Surface Area/Contributing Drainage Area = 1,000 to 10,000 square feet > 10,000 square feet Overflow Parking Parking Stalls Residential Streets Large Parking Lots Small Parking Lots Photos courtesy of David Smith, ICPI Road Shoulders, Fire Lanes
Infiltration and Underdrain Designs Detailed Peer-Reviewed Design Specification for Permeable Pavement Available at http://www.vwrrc.vt.edu/SWC/NonProprietary BMPs.html (Scroll Down > Permeable Pavement PDF) � Design Guidelines � General Hydrologic Sizing Equations � Construction Specifications Source: Hunt and Collins, 2008 Design Considerations • Underlying soil infiltration rates (underdrain?) • Limit CDA to nearly 100% impervious cover • If pervious areas are conveyed to practice, must provide pre- treatment • Any external drainage area to permeable pavement surface Q & A area should not exceed 5:1 ratio, 2:1 recommended • Design on flat slopes Follow-Up Questions: webcast@cwp.org • 2 foot separation from water table PICP Overview High Profile Projects…. Innovative Designs and Industry • Green/livable streets • Green Streets & Alleys for CSO reduction Advancements • Air Pollution Reduction David Smith, P.E. • Building Energy Enhancement Interlocking Concrete • ICPI Resources Pavement Institute (ICPI)
Warrenville, IL Ferdinand Street, Chicago, IL Wilmington, MA Chicago, IL 20 US Cellular Field Chicago, IL Chicago Green Alleys Program For CSO Reduction 21 www.cityofchicago.org/webportal/COCWebPortal/COC_EDITORIAL/GreenAlleyHandbook.pdf
Richmond, VA Green Alley Project th Street th Street 12 12 th Street 5 th Street th Street 5 th Street 5 Alley Alley Air Quality Pre-Data Collection in Chicago Antwerp, Belgium 100,000 sf parking TiO 2 coated pavers Largest NO x reductions on calm, warm days, no wind Data Points Include: NO, NO 2 , NO x , Wind Speed, UV Chicago Park District Mary Bartelme Park Criteria for Chicago’s Public Right of Way PICP with Photocatalytic Photocatalytic TiO TiO 2 Cement Coating PICP with 2 Cement Coating Using research data to establish a Chicago Standard for sustainable infrastructure in the public right of way
PICP Parking Lot in England with Horizontal Ground Source Heating
RAINFALL s (optional) Total Design Energy = 518 kW heating = 200 kW cooling Total Parking Lot ~70,000 ft 2 Geothermal Plant = $560,000 Parking Lot = $880,000 Total Investment = $1.4 million Cost = $220/m 2 ($20.44/sf) PICP Eco-Machine RAINFALL RAINFALL s s (optional) (optional) ET PICP Eco-Machine PICP Eco-Machine RAINFALL RAINFALL SMOG SMOG s s LIGHT HEAT/ (optional) (optional) ET ET PICP Eco-Machine PICP Eco-Machine
PICP Resources from icpi.org RAINFALL SMOG Trainer s LIGHT HEAT/ Certification Course (optional) ET Design Manual PICP Eco-Machine PICP Fact Sheets www.icpi.org Document Library Tech Specs Guide Specifications Detail Drawings Technical Papers Case Studies Articles Certified Products Q & A FAQs University Curriculum Follow-Up Questions: webcast@cwp.org 45 Urban Myths • Permeable pavement costs too much to build Installation & Maintenance Tips • Permeable pavement costs too much to maintain • Cannot clean permeable pavement when clogged • Cannot use permeable paverment in heavy Chuck Taylor, loaded areas-fire trucks, semi-trucks, garbage trucks, etc. Ecological Paver • Cannot use permeable pavements in cold Systems climates • Cannot build on clay soils
Morton Arboretum ITEM PICP STANDARD STANDARD CONCRETE ASPHALT Paving/SF $ 2.25 $ 8.00 $ 3.00 Excavating/SF $ 1.00 $ 1.00 $ 1.00 Stone/SF $ 2.00 $ 1.50 $ 1.50 Installation/SF $ 4.00 (in paving cost) $ 1.50 Curbs $ 1.50 $ 1.50 $ 1.50 Maintenance $ 0.20 Not Know Replacement None None Every 12 Years Detention/Retention required None Yes Yes Storm Sewer System/sf paving None $ 3.00 $ 3.00 Total/SF $ 10.95 $ 14.00 $ 11.50 Total/linear foot-municipal street $ 171.00 $ 218.00 $ 179.00 Total/linear ft for 30 ft wide $ 230.00 $ 280.00 $ 230.00 street Cost Comparison of Pavement Systems for Autumn Trails, Moline, Illinois as reported by George Bialecki, Jr. developer of Autumn Trails Normal Maintenance Movement of Sediment Heavy Loading Applications Naval Post Graduate School
Maxwell Street Market Parking Plaza Cold Weather EPA Primary Research Questions �Runoff Volume and Rate �Surface Water Quality �Ground Water Quality �Freeze/Thaw Performance Retention/Detention Market Plaza: Preliminary Monitoring Results 1/16/09 (temp in degrees) Air: -7.0 Deep: 38.6 Middle: 34.1 Shallow: 33.4 Sept 2008- Feb 2009 Full exfiltration: no subsurface drain pipes Partial Ex-filtration Overflow drains to inlet 59 60
Impermeable Liner Construction and Installation Geo-textile protects Liner No Ex-filtration Capture and Treat Possible Water Harvesting 61 Sub-Base Curb Construction Elmhurst College Silver LEED Jefferson Farms
LID Streetscape-Low Maintenance Do your existing designs work? Engineered Ecological Paver Systems Q & A Sustainable solutions that Last Follow-Up Questions: webcast@cwp.org Pollutant Removal • High removal rates of heavy metals, oil, grease Permeable Pavement – • Ongoing studies to evaluate nutrient removal. Lessons Learned – Nitrogen removal • Use of infiltration sump • Sand filter layers at Kelly Collins subbase Center for Watershed – Phosphorus removal Protection • Some particulate-bound P filtered in surface • Use of admixtures in subbase
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