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Stormwater Management Using Permeable Pavers
- 1. Permeable Pavers An AffordableAlternative to Traditional Storm Water Management - Intro & Project Experience - Permeable Paver SWMS – General Overview - Construction Methods and Materials - Storage and Infiltration Calculations - Costs Benefits & Breakdowns - FAQ’s
- 2. Eric K Weishaar President TheBreckenridge Landscaping – New Berlin - Over 20 yrs. Landscaping Experience - Started Breckenridge Landscape – 2009 - Inc. 5000 Fastest Growing Companies in America – 2015, 2016, 2017 & 2018 - MMAC/COSBE Future 50 Company 2017 & 2018 - Installed over 700,000 sf of Permeable Paver Projects - Installed largest Permeable Roadway in WI – Assembly Park, Delavan - Recently completed the installation of the Grafton Lumberyard Project
- 3. Permeable Paver Projectsof Note Project Name Location SF of Pavers Installed Just Kids Dental Sheboygan, WI 16,000 SF Assembly Park Delavan, WI 325,000 SF Wildlife In Need Oconomowoc, WI 15,000 SF Grafton Lumberyard Grafton, WI 9,000 SF Boerner Botanical Garden Greenfield, WI 9,000 SF Delavan Sanitary District Delavan, WI 15,000 SF Milwaukee Green Alleys Milwaukee, WI 30,000 SF Wauwatosa Green Alleys Wauwatosa, WI 21,000 SF Wehr Nature Center Franklin, WI 13,000 SF Strauss Brands New Berlin, WI 16,000 SF Pilgrim Springs Menomonee Falls, WI 19,000 SF River Club Mequon, WI 16,000 SF Milwaukee County Zoo Milwaukee, WI 50,000 SF
- 4. Projects of Note GraftonLumberyard
- 5. Projects of Note AssemblyPark – Delavan, WI
- 6. Projects of Note JustKids Dental– Sheboygan, WI
- 7. - Asphalt orConcrete Surface - Catch Basins at Curb - Underground Concrete Pipe - Municipal Storm Water Sewer - Detention Pond Traditional SWM System – Parking Lot Beautiful!
- 8. Traditional SWM System– Parking Lot Not So Beautiful! - Heavy Rain Overwhelms Surface - Catch Basins Can Clog - Pipes Cannot Handle the Volume - Parking Lots Flood Causing Damage - Detention Ponds Aren't Maintained Is it time to RE-THINK how we manage storm water?
- 9. Benefits of PermeablePaver SWMS Managing Storm Water - Entire surface is a catch basin - No Ponding - Shrink or Eliminate Detention Ponds - Built in Water Storage Durability - Typically Deeper Base than Asphalt - Pavers are more durable than Asphalt - Eliminate Need for Asphalt Patching Cost Savings - Overall Cost Savings - Less Year over Year Maintenance Cost - Lower Ice Control Costs - No Need to Restripe – Use Pavers - Aesthetic Value
- 10. Traditional SWM System Components -Storage Tank – 73,000 Gal - Inlets and Catch Basins – 44 - Concrete Pipe – 3000+ LF - Asphalt Surface - Concrete Curb & Gutter Courtesy of Site Design Group/EDI Traditional SWM System – Parking Lot
- 11. Permeable Paver System Components -Water Drains Through Paver Joints (No Catch Basins) - Water Infiltrates Where it Falls (No Concrete Pipe) - Water is Stored in Base (No Storage Tank Needed) - Concrete Paver Surface (More Durable Surface) - Optional Metal Edging (Concrete Curb Can Be Used) Courtesy of Site Design Group/EDI Permeable Paver System – Parking Lot
- 12. Permeable Paver CrossSection Detail – Typ.
- 13. Permeable Paver CrossSections Typical Standard Cross Section Typical Underdrain Cross Section Typical Sloped Cross Section
- 14. Mechanical Installation ofPaversMechanical Screeding with Track Skidsteer Mechanical Sweeping of Joint Filler Permeable Paver Installation Methods
- 15. Permeable Paver EdgeRestraint - Aluminum or Plastic Edging Restraint with attached Grid - Flush Concrete Curb
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- 18. B ase andA ggregat e C hart Permeable Paver Products
- 19. Storage Capacity Breakdown Entercriteria Rainwater Harvest Amount Base Storage Capacity Surplus/(Deficit) Storage Percentage Examples Rain (in./hr.) Surface Area (sf) Base Depth (in.) Void Space Cubic Feet Gallons Cubic Feet Gallons Cubic Feet Gallons Used A 1 43,560.00 12 40% 3,629.96 27,153.99 17,424.00 130,340.57 13,794.04 103,186.59 20.8% B 1 43,560.00 18 40% 3,629.96 27,153.99 26,136.00 195,510.86 22,506.04 168,356.87 13.9% C 3.5 43,560.00 12 40% 12,704.86 95,038.95 17,424.00 130,340.57 4,719.14 35,301.62 72.9% D 3.5 43,560.00 18 40% 12,704.86 95,038.95 26,136.00 195,510.86 13,431.14 100,471.90 48.6% E 5.11 43,560.00 13 40% 18,549.10 138,756.87 18,876.00 141,202.29 326.90 2,445.41 98.3% F 7.4 43,560.00 18 40% 26,861.70 200,939.50 26,136.00 195,510.86 (725.70) (5,428.64) 102.8% Permeable Paver Storage Capacity
- 20. *Infiltration rates ofvarious soil types influence the permeable model and base thickness Best Subsoil Conditions Gravely Subsoil ½” per hour Average Subsoil Conditions Sandy Subsoil ¼” per hour Poor Subsoil Conditions Clay/silt Subsoil Less than 1/8” per hour Permeable Paver SWMS Infiltration Rates
- 21. Source: http://watermanagement.ucdavis.edu/files/5414/3891/2393/A03_Terhell_Cai_Chiu_Murphy_ESM121_Fin alReport.pdf Cost and BenefitAnalysis of Permeable Pavements in Water Sustainibility Su-Lin Terhell, Kevin Cai, Dylan Chiu, Johnathon Murphy ESM 121 Final Paper. 5/25/2015 Cost Benefit Analysis Installation & Maintenance Costs – Asphalt vs Permeable Pavers
- 22. Cost Benefit Analysis InstallationCost Summary: Surface Total Cost Cost/SF Permeable Pavers $180,350.00 $8.28/sf Asphalt $109,000.00 $5.00/sf Difference $71,350.00 $3.28/sf However………… Based on ½ Acre Parking Lot
- 23. Cost Benefit Analysis …….Onceyou factor in any or all of these costs, the equation changes.
- 24. Cost Benefit Analysis InstallationCost Summary with BMP’s: Surface Total Cost Cost/SF Permeable Pavers $180,350.00 $8.28/sf Asphalt $207,417.00 $9.50/sf Difference ($27,067.00) $1.22/sf Factored using just a Biofiltration Swale Cost Based on ½ Acre Parking Lot
- 25. FAQ’s General Maintenance - Leafblow surface weekly or as needed depending on site conditions. - Sweep with mechanical broom and add infill chips as needed on a annual or bi-annual basis - Keep dirt and debris out of joints. - The Open Grade gravel inhibits weed growth. - If some appear, pull or use weed control What About Weeds? - Shovel or plow as you would any other surface. - Limit salt use, do not use boutique ice control products What About Winter?