Drainage Improvement Program (DrIP)

The Drainage Improvement Program (DrIP) was established for the timely correction of small neighborhood drainage problems. The city has received hundreds of drainage complaints over the years and has had no financial assets to resolve the problems. Some of these problems are severe, resulting in flooded residences and businesses.

The DrIP is intended to construct drainage projects to resolve long-standing neighborhood drainage problems. The scope of these projects is relatively small. Typically the cost of an individual project will be $20,000 to $80,000.


The DrIP is funded from stormwater utility fees and administered by Stormwater Management. A specific portion of the increased utility fee is dedicated to the DrIP. The full funding level of approximately $400,000 will be reached in July 2011.

If a drainage solution’s cost and scope exceeds the DrIP’s limitations, stormwater staff may propose it as a Capital Improvement Project. Larger flooding issues on major watercourses will be assessed and addressed as part of the ongoing citywide Stormwater Master Plan. For drainage problems that don’t qualify for the program, stormwater staff can inspect and provide advice.


To submit information about drainage or flooding problems in your neighborhood:
  • Call (928) 213-2474
  • Send your name, address and a description of the problem to Chris Palmer    
  • Leave comments at the Community Development Department permit desk at City Hall
    • 211 W. Aspen Ave.
      Flagstaff, AZ 86001
  • Mail comments to Stormwater Management at City Hall
    • 211 W. Aspen Ave.
      Flagstaff, AZ 86001