Marana requires grading and drainage permits for land disturbance projects under the Land Development Code. The town works with the Pima County Regional Flood Control District to enforce floodplain management and drainage design standards, particularly critical in the Santa Cruz River watershed.
The Marana Land Development Code Title 22 establishes comprehensive grading and drainage requirements. A grading permit is required for any earthwork that changes the natural drainage pattern, moves more than 50 cubic yards of material, or creates cut or fill slopes exceeding 3 feet in height. Drainage plans must demonstrate that post-development stormwater runoff does not exceed pre-development flows, consistent with the retention and detention basin standards. Marana sits within the Santa Cruz River and Brawley Wash watersheds, both of which are subject to Pima County Regional Flood Control District regulations. Development within FEMA-designated flood zones requires additional review and elevation certificates. Arizona HB 2675 encourages rainwater harvesting, and Marana supports on-site retention through the grading and drainage permit process. The town requires registered professionals, either civil engineers or landscape architects licensed in Arizona, to prepare grading and drainage plans for projects above the minimum thresholds. All development must comply with the Pima County Floodplain Management Ordinance adopted by reference in the Marana code.
Grading without permit: stop-work order, correction plan, and civil penalty. Altering drainage to damage neighboring property: civil liability and code enforcement action. FEMA floodplain violations: loss of federal flood insurance eligibility and fines.
Marana, AZ
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