Is your construction entrance/exit stabilized?
Tracking sediment from construction sites onto roadways can cause storm water pollution, as well as safety hazards. Proper planning is required to ensure adequate best management practices (BMPs) are installed to prevent off-site tracking of sediment or other pollutants by vehicles exiting construction sites.
When choosing the type of BMPs for stabilizing a construction entrance/exit the following should be taken into consideration:
- Size of area for constructing a stabilized entrance;
- Level of ground; and
- Area to discharge runoff from stabilized entrance/exit.
BMPs for stabilizing construction entrances/exit include aggregate, steel plates with ribs, and construction mats. While various types of BMPs may be used to stabilize a construction entrance/exit, aggregate is probably the most commonly used on construction sites.
If aggregate will be used to stabilize a construction entrance/exit, the requirements for installation and construction may include specifications for the following:
- Dimensions of stabilized entrance/exit;
- Size of aggregate;
- Depth of aggregate; and
- Geotextile under aggregate.
Inspection and maintenance of BMPs for construction entrances/exits are imperative and includes inspecting for damage, replenishing aggregate periodically, and removing excess sediment to prevent clogging.
Remember, the main objective of stabilizing construction entrances/exits is to reduce the tracking of sediment offsite to prevent storm water pollution.