Civil plans are plans created specific to your site,
usually by a licensed engineer. For 1-lot residential
sites, a site plan is usually sufficient for permit
requirements. Additional civil plans are needed for
larger projects in order to fulfill CGP requirements
relating to the following: site contours/topography that
may change over the course of the project, site
drainage, UICs, LIDs, landscaping plans, and detail &
specification sheets, etc. These plans are also needed
for creating BMP map(s) for your SWPPP.