fishbeck, thompson, carr & huber, inc. - michigan · 2016. 2. 26. · fishbeck, thompson, carr...
TRANSCRIPT
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Fishbeck, Thompson, Carr & Huber, Inc.
Porous Pavement Up North
Meijer – Manistee, Michigan
Northern Michigan Green Infrastructure Conference
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Project Location – Manistee
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Project Site Looking East
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Project Site Looking East
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Design Focus: Stormwater Quality
� Porous paving� Catch basin
sediment sumps� Mechanical
sediment removal� Infiltration basins� Low-velocity
discharge� Maintenance plan
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North Team Member Parking Area
About 20% of the site pavement area is porous
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East Team Member Parking Area
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Stormwater Treatment Unit
Vortech: 80% sediment removalof first 1-inch rainfall
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Infiltration Areas
Two infiltration areas infiltrate 1.5- to 2-inch rainfalls
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Level Spreaders
Reduce discharge velocity to wetlands
Discharge velocity < 1fps
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Porous Mix Design is Critical
� Stone gradation� Removal of all fines� Smaller crushed stone in
pavement (1/2-inch)� Larger crushed stone in
reservoir (3/4-inch)� Modified binders and anti-
strippers in pavement to prevent drain down and raveling
� Asphalt content (5.5 to 6.5%)
� Air voids (18 to 22%)
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Preconstruction Test Strip
Installed at Elmer’s Traverse City office� Reviewed mix design� Tested reservoir stone
gradation� Determined rolling
temperature� Determined rolling
pattern and roller size� Compaction density
targets� Testing requirements
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Preconstruction Test Strip
Infiltration testing:� ASTM C1701 test
requires 150”/hour
� Results: 270”/hour
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Benefits of Porous Pavement
� Infiltration of stormwater� Less discharge to surface waters
(volume and quality)� Recharge groundwater
� Water removed from pavement structure� Much less cracking or potholing in pavement� Reduced ice/slip problems� Reduced salt application in winter
� Fewer stormwater inlet structures in parking lot� Fewer and smaller storm sewers on project� Possible elimination of detention ponds on sites
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Maintenance
� Maintenance staff education� Sediment clogging� Snow plowing
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Questions?
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Fishbeck, Thompson, Carr & Huber, Inc.
Thank You!
Anthony Mourand, PEVice President – Civil Engineering/Land [email protected]