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===Foundation Aggregates===
===Foundation Aggregates===
All aggregates should meet the following criteria:
All aggregates should meet the following criteria:
* Porosity of 0.4
* Porosity of 0.4
[[Wells|Monitoring Wells]]: see “Deeper Wells” section
[[Wells|Monitoring Wells]]: see “Deeper Wells” section
===Heavy Vehicle Traffic===
[[File:PaveDrain.jpg|thumb|PaveDrain at the LSRCA headquarters in Newmarket, ON is an example of an articulated block system designed for heavy loads.]]
[[File:Geogitter-4.jpg|thumb|Geogrids like these are sometimes incorporated into the layers of permeable pavement foundation aggregates to provide additional stability and conserve aggregate material]]
Permeable paving is not typically used in locations subject to heavy loads. However, some permeable pavements are designed for heavy loads and have been used in commercial port loading and storage areas. A flexible geogrid structure may be used to improve the structural capacity of the pavement by spreading loads over a larger area. Increasing the base thickness will also improve structural capacity.
===Modeling permeable paving in the Treatment Train Tool===
===Modeling permeable paving in the Treatment Train Tool===