Summer is prime building and development time. It also happens to be the three wettest months in Minnesota. This year already ranks as the third wettest year on record, which brings an added emphasis on construction stormwater management practices.
The Minnesota Pollution Control Agency has put together a list of the top five construction stormwater violations.
1. Missing or inadequate soil stabilization. Without proper stabilization, the soil is vulnerable to erosion.
2. Missing perimeter controls. When perimeter controls are missing, stormwater carries sediment off-site and into waters of the state.
3. Missing or inadequate inlet protection. Missing or inadequate inlet protection allows sediment to enter the storm sewers and/or bodies of water.
4. Vehicle tracking. Without a tracking BMP, vehicles track sediment onto paved surfaces.
5. BMPs not contained. Unmaintained BMPs do not function properly and allow sediment to escape and enter waters of the state.
Ensure that you have a Construction Stormwater Permit and Plan if one is needed. Remember to inspect your site within 24 hours of rainfall more than half an inch.
Repair, replace, or supplement all nonfunctional BMPs by the end of the next business day after the discovery, or as soon as field conditions allow access unless another time frame is specified by the Minnesota Pollution Control Agency.