Coconino County is landlocked high country, so 'coastal' rules mean floodplain and watercourse protection. Under ARS §48-3613, you cannot obstruct a watercourse or develop in a mapped floodplain without written authorization from the county Flood Control District.
There is no ocean here; the water hazards are the Rio de Flag through Flagstaff, Oak Creek in the canyon country, the Little Colorado, and post-wildfire flash floods off the Museum and Pipeline Fire burn scars. The Coconino County Flood Control District administers floodplain management under ARS §48-3601 et seq. Any development that would divert, retard, or obstruct a watercourse, and any building within a delineated floodplain, needs the board's written authorization. FEMA-mapped Special Flood Hazard Areas carry elevation standards, and the Army Corps and City of Flagstaff Rio de Flag project targets chronic downtown flooding. Riparian corridors along Oak Creek receive added protection.
Diverting or obstructing a watercourse, or building in a delineated floodplain, without the Flood Control District's written authorization violates ARS §48-3613, bringing stop-work orders, civil penalties, and orders to remove the encroachment.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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See how Page's coastal development rules stack up against other locations.
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