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Transportation and Stormwater Infrastructure
WHAT ARE PERMEABLE PAVERS?
Permeable pavers are a stormwater management practice used in place of traditional concrete or
asphalt to decrease stormwater runoff. Unlike traditional surfaces, permeable pavers allow water to
infiltrate into a layer of rock. Water then moves into the soil or to a subsurface drain.
WHY INSTALL PERMEABLE PAVERS?
Permeable pavers are installed to protect water
quality and reduce the volume of stormwater runoff,
The process allows the water to percolate slowly
through the rock layer, filtering out many pollutants.
This process also slows the water down, stabilizing
stream flows and reducing flood potential.
WHERE TO INSTALL?
With careful planning and design, permeable
pavers can be installed where traditional pavement
is found. Areas such as driveways, roads, alleys, and
parking lots are all suitable locations for pavers.
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PERMEABLE PAVER INSTALLATION
Step 1 Removal of concrete and excavation
Step 3 Leveling and compacting aggregate
Step 2 Installation of perforated subdrain tile
PERMEABLE PAVER MAINTENANCE
Step 4 Laying pavers
Develop a maintenance plan and inspect pavement routinely.
Ensure pavers infiltrate during rain events (no ponding or runoff).
Pavers should be cleaned with a vacuum truck on a scheduled basis to avoid plugging.
Sand should not be used on pavers because it plugs pore spaces.
Remove built up dirt/leaves/grass/other organic material.
Stabilize surrounding soil immediately to prevent sediment from moving onto pavers.
>> Avoid staging of landscaping materials (mulch or soil) on pavers.
PERMEABLE PAVERS OF IOWA
1 Davenport - Residential Street
2 Storm Lake - Parking Stalls
4 Dubuque - Alleyway
5 Grinnell -Public Library Walkway
3 Charles City - Residential Intersection 6 Clinton - Business District Retrofit