A pre-development watershed and erosion control plan is a comprehensive strategy devised at the outset of a land development project to systematically address potential environmental impacts associated with construction activities. This plan meticulously analyzes the existing conditions of the site, encompassing topography, soil characteristics, and natural drainage patterns. It delineates watershed boundaries, identifying the broader hydrological context that influences the site.

Erosion control measures, including the installation of silt fences, erosion control blankets, and sediment basins, are outlined to prevent soil erosion during construction. Preservation or restoration of natural vegetation is also considered for stabilizing the soil and preventing erosion. Construction phasing is strategically planned to minimize the exposure of bare soil and reduce the risk of erosion. By adhering to regulations, this pre-development plan aims to mitigate the environmental impact of construction, protect water quality, and establish sustainable practices for responsible land development. Subsequently, the plan is often submitted for regulatory approval as an integral component of the overall site development process.