Floodplain Permit Application

Floodplain Permit fees for Cascade County are $250 per County Resolution 13-19. Fees are set by the County Commission and due upon application.

Examples of Projects That Would Require a Permit

The following are examples of projects that would require an Approved Floodplain Permit:

  • Projects to construct flood control or bank protection measures
  • Modifications to surface water diversions
  • The storage of materials and equipment, buried or suspended utility transmission lines
  • Expanding existing structures
  • Constructing new roads or driveways, bridges, docks, boat ramps
  • Placing material within the 100-year floodplain

Additional Guidelines

  • Any new construction within the 100-year floodplain will be required to meet floodplain regulations for either wet or dry proofing.
  • Dry floodproofing requires all structures to be constructed two feet above the estimated elevation floodwaters will reach during a flood event, known as the Base Flood Elevation (BFE).
  • Wet floodproofing requires structures to be elevated to at least the BFE and for the new structure to include flood prevention vents that allow water to flow in and out of the structure in a flood event.
  • Any utilities (electrical systems, heating and cooling systems, plumbing systems, ductwork, ventilation, etc.) must either remain two feet above BFE or be installed as described in the Cascade County Floodplain Regulations to withstand a flood event.
  • No new construction is allowed in the Regulatory Floodway.