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Construction and Erosion Control

Sediment runoff is a major concern for any stormwater management system, and especially those in desert environments where there is less vegetation to anchor the soil. Erosion washesConstruction silt fence sediment off slopes and into the Municipal Separate Storm Sewer System (MS4) where it can cause blockages and transport other pollutants into the MS4. Avondale’s erosion control-measures help keep sediment and other pollutants where where they belong: out of the MS4!

Construction Stormwater Pollution Prevention Plans (SWPPP)

Construction Site Runoff Control comprises MCM 4 of Avondale's Stormwater Management Plan (SWMP). To comply with the SWMP, Construction General Permit, and City of Avondale ordinances, all construction projects that disturb over one acre of land are required to submit a Stormwater Pollution Prevention Plan (SWPPP) to the City for review. SWPPPs outline the Best Management Practices (BMPs) construction operators will use to prevent erosion and sedimentation runoff in various stages of the project. The City has created a SWPPP Template, a WPCD Template and approved BMP list that all construction operators must use to submit their SWPPP.

Some stormwater and non-stormwater discharges from construction are allowed, provided the proper BMPs are in place and the discharges contain no pollutants. See the AZPDES Construction General Permit for guidance.

Ordinances

City Council adopted an Erosion Control Ordinance in 2005 and Stormwater Quality Protection Ordinance in 2006
to comply with Federal and State mandates from the Clean Water Act. The ordinances provide technical and legal guidance for the development community and City Capital Improvement Projects through both pre- and post-construction erosion and sediment control Best Management Practices (BMPs). The ordinances also identify enforcement tools and associated penalties for violations.