Grading and land-clearing in Coconino County require erosion and sediment controls. Sites of one acre or more also need an AZPDES permit and SWPPP, with post-wildfire slopes demanding extra stabilization against monsoon runoff.
County grading permits require an erosion and sediment control plan before ground is disturbed. Standard measures include silt fence, straw wattles, erosion blankets, stabilized construction entrances, and prompt reseeding of bare soil. In the ponderosa high country, steep slopes and decomposed-granite soils erode quickly once vegetation is removed, and the Museum and Pipeline Fire burn scars showed how fast unstabilized ground sheds mud and debris in a monsoon cell. Sites disturbing an acre or more fall under ADEQ's AZPDES construction general permit. Disturbed areas must be stabilized within the permit's timeframe, and inspections continue through construction.
Clearing or grading without required erosion controls brings a stop-work order and fines. Sediment reaching a wash, Oak Creek, or the Rio de Flag adds ADEQ water-quality enforcement.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Coconino County, AZ
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See how Coconino County's erosion control rules stack up against other locations.
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