Master Drainage Plan


The goal of this project is to develop a comprehensive drainage plan for the entire city that addresses
existing drainage and flooding problems and avoids creating future ones.

The drainage basin is the logical physical unit for
developing drainage plans. A map of the drainage basins being used to develop the Master Drainage
Plan is shown at right.


To complete the plan in a timely manner, stormwater staff have obtained the assistance of the WLB Group, from Flagstaff, working with J.E. Fuller Hydrology and Geomorphology, from Tempe. These consultants have developed drainage plans for the following basins: Fanning Drive Wash; Penstock Wash; West Street Wash; Spruce Avenue Wash; Steve's Boulevard Wash; Switzer Canyon Wash. The results of this work, referred to as the Northeast Area Master Drainage Study, can be found in the reports linked below: 

City staff will complete the plan for the remaining drainage basins. However, it should be noted that most of the drainage and flooding issues in the Upper Rio de Flag and Clay Avenue Wash drainage basins are being addressed by the Rio de Flag Flood Damage Reduction Project, which is a joint project between the city and the U.S. Army Corps of Engineers.