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Stormwater Information for Builders and Developers

Construction Site Runoff Control

Construction site runoff control is essential to maintaining clean water. Construction disturbs soil at building sites and can generate large amounts of sediment. Sediment — if allowed to run into our lakes, streams, rivers, and wetlands — diminishes recreational use, reduces storage capacity and floodwater retention, degrades aquatic life, and depreciates property values. It is more affordable to prevent these problems than to correct them after they have occurred. For more about construction-related water pollution and sediment, see:

New: Self-Inspection Forms

Rule 5 requires site owners to monitor their own sites weekly and after every half-inch rain event, to ensure that BMPs are installed and maintained correctly and in a timely manner. We have developed the following forms as a way to provide guidance to meet this requirement:

If you have questions or would like technical assistance on using these forms or meeting the self-monitoring requirements, please contact Jason or Eric at (574) 533-3630 ext. 3.

About Rule 5 and Rule 13

The state law regulating Construction Site Runoff Control is known as Rule 5. A related rule, Rule 13, requires small municipalities and counties with urbanized areas to put programs in place to improve stormwater quality. These two rules are part of the state pollution prevention rules.

In order to comply with Rule 5 requirements, site owners, builders and developers must file a Stormwater Pollution Prevention Plan (SWPPP). Here is a brief overview of Rule 5 Requirements and Useful Forms for help with submittal of the SWPPP.

Post-Construction Runoff Control

For the past two decades, the rate of land development across the country has been more than two times greater than the rate of population growth. If unchecked, the increased impervious surface associated with this development — roads, parking lots, and rooftops — will increase stormwater volume and degrade water quality, which can harm lakes, rivers, streams, and coastal areas.

The best way to prevent stormwater impacts from new development is to use practices to treat, store, and infiltrate runoff onsite before it can affect water bodies downstream. Innovative site designs that reduce imperviousness and smaller-scale low impact development practices dispersed throughout a site are excellent ways to achieve the goals of reducing flows and improving water quality.

New development and redevelopment projects need to follow local requirements to protect water quality during post-construction stormwater management. This means using Best Management Practices (BMPs) to prevent negative impacts from stormwater running off the site.

For information on specific post-construction practices, visit the EPA's Menu of BMPs.

For more about post-construction stormwater management, refer to this fact sheet (PDF) from the EPA.

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