FACT: Studies indicate that poorly managed construction sites can release up to 1,000 tons of sediment per acre during a year, compared to 1 ton or less from forested or prairie lands.Construction Sites
Construction activity is the largest source of human-caused sediment entering into our waters. Studies indicate that erosion rates from construction sites are typically 10 times greater than agricultural fields and approximately 100 times greater than vegetated areas, such as forests or pastures. Construction activity can also result in soil compaction, reduced infiltration, and increased runoff. To minimize the amount of sediment washing downstream of a construction area, contractors should follow the following 8 practices listed below.
- Identify the storm drains near the construction area and protect these drains against sedimentation.
- Do not allow concrete, paints, chemicals, sediment, yard debris, etc. to enter the storm water conveyance system (curb, gutter, sidewalk, street, drain and inlet). Store these products so they will stay dry out of the rain.
- Establish and use an adequately sized concrete washout area to contain all liquids on site.
- Provide erosion and sediment control to prevent these pollutants from leaving the site.
- Provide a stabilized entrance and exit for vehicles to prevent tracking dirt off site.
- Sweep-up surface areas regularly and place the waste in a dumpster. Don't use water to clean. Contain stored materials in a secure place to prevent seepage and spillage.
- Properly dispose of all materials. Do not dump unused or waste products on the ground, where water can carry it to the conveyance system.
- When washing equipment on site, prevent wastewater from entering the storm water conveyance system. Do not let the water leave the site.