In order to be eligible to receive federal aid, loans and grants, local governments are required to adopt and enforce rules regulating the use of flood prone land. In Boone County, the Planning Division maintains the County Flood Insurance Rate Maps and enforces the Flood Plain Regulations.

All building permit applications are checked against the flood maps to determine the location of a proposed structure relative to the regulatory floodplain. Structures proposed for the floodplain fringe area can be built provided that they are either elevated or flood proofed. There are very strict prohibitions against building in the floodway itself, however, agricultural structures are allowed provided that they can be designed and built such that flood waters are allowed to pass through the structure.