Silt fencing, single and double rows, check dams, temporary retention ponds, grassing, wattles, etc, etc are all part of the BMP (Best Management Practices) plan that the Civil Engineer designs for a site. The BMP plan is required before you get a NPDES (National Pollution Discharge Elimination System) permit from the State, which is required by the EPA for any site disturbance over 1 acre.
Here is a link to the regulations.
To say the least, the rules are quite stringent and a site inspection by the EPA can be grueling.:bash