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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

outline
Outline
  • 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.

slide6

Porous Asphalt

Pervious Pavers

Pervious Concrete

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???
paired intersection study robbinsdale mn
Paired Intersection Study, Robbinsdale, MN

Porous asphalt test section - Abbott/41st , 2009

slide27
Cost
  • 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 Demohttp://www.youtube.com/watch?v=j_z0xRPbExY
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

Before

After

Asphalt replaced with pervious concrete and draintile, 2007

mound transit center mound mn
Mound Transit Center, Mound, MN

Installed pervious pavers, 2007

little six casino prior lake mn
Little Six Casino, Prior Lake, MN

Porous asphalt pavement in parking lot, 2009

slide39

Brainerd Area

Porous asphalt parking lot, 2006

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