Grading and drainage in Hernando County are governed by the Environmental Resource Permit and the county land development code. Under Fla. Stat. §373.413, altering drainage through a stormwater system requires District approval so water resources are not harmed.
Reshaping land, filling low spots, or redirecting drainage in Hernando County engages both the county's land development code and state water law. An Environmental Resource Permit from the Southwest Florida Water Management District under Fla. Stat. §373.413 is required where grading creates or alters a stormwater management system. Karst geology adds caution: filling or capping a sinkhole or closed depression can reroute recharge to the aquifer and needs review. The county checks grading and drainage plans for plats and site development to keep runoff off neighboring lots, and Florida's common-law reasonable-use rule bars unreasonably diverting surface water onto adjoining property.
Grading that creates an unpermitted stormwater system, fills a sinkhole without review, or diverts drainage onto a neighbor violates Fla. Stat. §373.413 and county rules, bringing enforcement, stop-work orders, and civil liability for flood damage.
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Hernando County, FL
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