Frequently Asked Questions

Review the Submittal Requirements Checklist (PDF) for specific project.

Check the Federal Emergency Management Agency’s flood insurance maps, or you can call the flood control district’s floodplain division at (602) 506-2939 and ask for floodplain determination. Prior to calling make sure you have the Tax Assessor Number. If you have an internet connection, you can find your parcel number and determine if your parcel is in a floodplain by accessing Maricopa County’s GIS website.

The Town will determine fees at the time of submittal.

An Arizona registered civil engineer is needed for all single-family homes, subdivisions, and commercial properties. For fence and pool permits, engineering will not be required unless specified by the Town reviewer.

The location of the structure in proximity to a wash is dependent on the size of the wash; the amount of flow the wash carries, and if any bank stabilization is required. The Town engineering plan reviewer will determine if a location is acceptable during the plan review. In general, stay away from all major washes. A good rule for proposed structures within twenty feet would be to provide bank protection and set the footers three feet below the bottom elevation of the wash. For larger washes, a civil engineer will need to determine appropriate erosion control. Erosion control may need to meet Arizona State Standard Attachment 5-96 (PDF). Refer also to Drainage Guidelines (PDF).

Yes, any roadway grading can change historical drainage patterns. An Arizona registered civil engineered site plan showing existing and proposed contours in profile is required. The plans need to justify that historical drainage patterns are maintained. Additionally, the engineer needs to provide calculations and a detailed site plan to show the culvert is designed correctly. A building permit is mandatory if a structure such as a culvert is required.