(a) No land use permit to alter or relocate a watercourse in a mapped floodplain shall be issued until the local official has notified in writing all adjacent municipalities, the Department and FEMA regional offices and required the applicant to secure all necessary state and federal permits. The standards of Section 13-2-20 must be met and the flood carrying capacity of any altered or relocated watercourse shall be maintained.
(b) As soon as is practicable, but not later than six (6) months after the date of the watercourse alteration or relocation and pursuant to Sections 13-2-80 and 13-2-81, the municipality shall apply for a Letter of Map Revision (LOMR) from FEMA. Any such alterations must be reviewed and approved by FEMA and the DNR through the LOMC process.