To know what needs to be shown, please review the section regarding Plan Submittal Requirements on the Drainage Review page.
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If the property is located in the Unincorporated Areas of Maricopa County, you can call the Flood Control District’s Floodplain Division at 602-506-2419 and ask for floodplain determination. Prior to calling make sure you have the Tax Assessor Number. You may also check the Federal Emergency Management Agency’s Flood Insurance Maps
Whether a site inspection is needed or not depends on the location of the site and if the Engineering Division already has drainage information for the site. The Engineering Division Representative will determine if a site inspection is needed at the time of the plan submittal.
Yes, in most instances. Check the Drainage Matrix page
A Drainage Clearance is issued as part of the Building Permitting process. A site plan has to be submitted to the Maricopa County Planning and Development Department. The Plan is taken in and a decision is made whether a site investigation is required. If not, then the plan is either issued over the counter or sent to Engineering for further review. If a site investigation is required, the applicant is told to stake the property corners of the building location and call for the site inspection. Once the inspection is performed, the decision is made as to whether an engineer needs to be retained to provide hydrology and/or hydraulic information, or are we able to issue the Drainage Clearance only based upon minimal information such as drainage arrows and cross-sections.
Once the final plans are prepared and sent to the Engineering Division for review and, if all of the requirements are met, they are approved. When all of the reviewing agencies are satisfied that the plan meets their requirements, a Drainage Clearance is issued as part of the County’s Permitting Process. For further information call 602-506-3301.
Call the Maricopa County Planning and Development at 602-506-3301. Be prepared to provide as much detail as possible, including the address or parcel number involved and a description of the suspected violation. If you choose to provide your name and phone number, efforts will be made to keep that information confidential. You may also report a violation online.
After everything has been completed, all the concrete has been poured, all trenches have been filled, stockpiles/berms removed and the site has been rough graded. Call our inspection line at 602-506-3629. Inspections for the next day need to be called in prior to 2:30 p.m. (This is an automated system). You can also
Prior to pouring the stem walls, you must call for a stem inspection. Have the contractor set up the height of the stem walls for our inspector’s site visit. This should happen after the initial site plan has been approved. Call our inspection line at 602-506-3629. Inspections for the next day need to be called in prior to 2:30 p.m. (This is an automated system). You can also request an inspection online.