What type of erosion and sedimentation control measures are removed once permanent measures are installed?

Temporary erosion and sedimentation control measures are specifically designed to address short-term issues, particularly during construction activities. These measures—such as silt fences, sediment basins, and temporary grass seeding—serve a critical role in protecting the environment until the site is stabilized with permanent solutions like vegetation or paved surfaces.

Once the permanent measures are in place and the site has achieved stability, the temporary measures are no longer necessary. This transition occurs because the permanent solutions are designed to provide ongoing protection against erosion and sediment loss, effectively serving the same purpose as the temporary controls but for the long term.

In contrast, permanent measures are intended for lasting use and remain in place to provide continuous erosion control. Structural measures may involve built features that additionally support stability, while supporting measures could include any auxiliary method that aids in the main effort but also is usually not removed. Temporary measures, however, are the only type designed specifically to be removed once the site is adequately stabilized.