Floodplain Conditional Use Permit

To minimize damage to structures during flood events, the County requires all new construction in the floodplain to be anchored against movement by floodwaters, resistant to flood forces, constructed with flood-resistant materials, and flood- proofed or elevated so that the first floor of living space, as well as all mechanical and services, is at least one foot above the elevation of the 100-year flood. These standards apply to new structures and to substantial improvements of existing structures. 

The County defines a substantial improvement as any reconstruction, rehabilitation, or addition to an existing structure, the cost of which exceeds 50% of the structure’s appraised or market value (whichever the builder chooses to use). 

More Information

Contact the Blaine County Land Use and Building Services for more information at 208-788-5570. Additionally, most other types of development within the floodplain also require a Special use permit, such as grading, cut and fill, installation of riprap, and other bank stabilization techniques. County staff is available to undertake site visits, if requested, to review flood, riparian and setback issues.

Before You Act

Contact the County Land Use Department at 208-788-5570 or view the County regulations, prior to undertaking any activity within the floodplain.