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Permeable Pavements. Shingle Creek Watershed Management Commission May 31, 2011. Outline. Purpose of presentation Types of pavements and applications Benefits Design considerations Maintenance considerations Example projects Questions. Types of Permeable Pavements. Porous Asphalt

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Permeable pavements

Permeable Pavements

Shingle Creek Watershed Management Commission

May 31, 2011



  • Purpose of presentation

  • Types of pavements and applications

  • Benefits

  • Design considerations

  • Maintenance considerations

  • Example projects

  • Questions

Types of permeable pavements

Types of Permeable Pavements

  • Porous Asphalt

  • Pervious Concrete

  • Pervious Pavers

    Permeable pavement has pores or openings that allow water to pass through the surface and stone base material and infiltrate into the underlying soils.

Permeable pavements

Porous Asphalt

Pervious Pavers

Pervious Concrete

Pervious pavement hydrology

Pervious Pavement Hydrology

Permeable pavements

Porous HMA (or Dense HMA with Piping)

Permeable pavements

John Barten, second from right, riding on pervious pavement in Medina around 1905.

Water storage in pervious concrete system

Water Storage in Pervious Concrete System

Porous asphalt section

Porous Asphalt Section

Pervious concrete paver

Pervious Concrete Paver

Project applications

Project Applications

  • Streets

  • Parking lots

  • Sidewalks and paths

  • Driveways

  • Patios

  • Playgrounds

Potential benefits

Potential Benefits

  • Reduces the rate and quantity of stormwater runoff

  • Reduces stress on the sewer system

  • Recharges groundwater

  • Filters out silt, pollutants, and debris

  • Maintains natural drainage paths

  • Reduces standing water nuisance

Potential benefits1

Potential Benefits

  • Reduces stormwater infrastructure needs (pipes, ponds, catch basins)

  • Offers good alternative to conventional stormwater mitigation

  • Better erosion control

  • Reduces ice buildup and need for salting during the winter

  • Provides better traction

Design considerations

Design Considerations

  • Soils

  • Depth to groundwater

  • Traffic loading

  • Slopes

  • Blowing dust and debris

Design considerations1

Design Considerations

  • Unique site features

  • Agency stormwater regulations

  • Frost penetration

Permeable pavement limitations

Permeable Pavement Limitations

Use of permeable pavement is not recommended in the following cases:

  • Industrial “brownfield sites or sites with contaminated soils

  • Where site layouts direct clogging sediment on the pavement surface

  • Sites with excessively steep grades

Maintenance considerations

Maintenance Considerations

  • Protect pavement from silt and sediment during and after construction

  • Vacuum sweep at least twice a year

  • Do not seal coat

  • Do not sand

  • Use caution when snowplowing

  • Post signs advising maintenance crews

Maintenance considerations1

Maintenance Considerations

  • Perform periodic inspections; look for clogging, raveling, cracking, and wear

  • Other???

Ongoing maintenance vacuum sweeping

Ongoing Maintenance -Vacuum Sweeping



Maintenance warning signs

Maintenance Warning Signs

Paired intersection study robbinsdale mn

Paired Intersection Study, Robbinsdale, MN

Porous asphalt test section - Abbott/41st , 2009

Porous subgrade preparation

Porous Subgrade Preparation

Porous asphalt placement

Porous Asphalt Placement

Permeable pavements


  • Test section = 150 feet long, 27 feet wide

  • Traditional pavement, contract unit prices = $14,125 =$32/SY

  • Porous pavement

    • Site 1 = $42,670

    • Site 2 = $32,200

  • “Upcost” = $35-50/SY

Residential street paving project shoreview mn

Residential Street Paving Project, Shoreview, MN

Lake Owasso

Asphalt replaced with pervious concrete, 2009

Water infiltration demo http www youtube com watch v j z0xrpbexy

Water Infiltration Demo

Shoreview water infiltration demo

Shoreview Water Infiltration Demo

Pervious concrete cost comparison

Pervious Concrete Cost Comparison

Common Excavation – 11,000CY($6.00/CY) = $ 66,000*

Fabric – 11,000SY($1.00/SY) = $ 11,000

1-1/2” Crushed Rock – 5000CY($52.00/CY) = $260,000*

7” Pervious Concrete – 8470SY($46.50/SY) = $394,000

Total Cost for Pervious Concrete System= $731,000

Per SY Cost for Pervious Concrete System= $ 86.30**

*Average depth beneath concrete = 1.75-feet

Estimated Bituminous Road Cost = $257,000

Estimated Underground Infiltration Cost= $417,500

Total Est Cost – Bit Road & Infiltration= $674,000

Per SY Est Cost – Bit Road & Infiltration= $ 79.60**

**8.5% Increased Cost for Pervious Concrete

Wolner field parking lot mound mn

Wolner Field Parking Lot, Mound, MN



Asphalt replaced with pervious concrete and draintile, 2007

Pavement cost comparison

Pavement Cost Comparison

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Mound Transit Center, Mound, MN

Installed pervious pavers, 2007

Subgrade preparation

Subgrade preparation

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Little Six Casino, Prior Lake, MN

Porous asphalt pavement in parking lot, 2009

Permeable pavements

Brainerd Area

Porous asphalt parking lot, 2006

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