Some LID features are designed to retain water within the media that makes up the LID feature (e.g. [[permeable pavement]] will be on top of a gravel bed where water can be stored). To measure the amount of water retention in a monitoring well, install a water level logger:
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Some LID features are designed to retain water within the media that makes up the LID feature (e.g. [[permeable pavements|permeable pavement]] will be on top of a gravel bed where water can be stored). To measure the amount of water retention in a monitoring well, install a water level logger:
* Install the well while the feature is being constructed or undergoing major maintenance.
* Install the well while the feature is being constructed or undergoing major maintenance.
* If there is an underdrain in the feature, make sure the bottom of the well reaches below it.
* If there is an underdrain in the feature, make sure the bottom of the well reaches below it.