Project Details

Upper East Fork Cave Creek ADMS Update

Public Meetings

Currently there are no public meetings scheduled for this project.

Past Public Meetings

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Project Contact: Tim Murphy
Region: N
District: 3 - Andy Kunasek
Phase: Planning & Studies

The Upper East Fork Cave Creek Area Drainage Master Study Update is a regional drainage study to be conducted in north central Phoenix by the Flood Control District of Maricopa County. The study will analyze a 17 square mile area bounded by the Central Arizona Project canal to the north, Cave Creek to the west, the Middle Indian Bend Wash ADMS to the east and the Arizona Canal Diversion Channel ADMS to the south (see study area map). The area is mainly residential with commercial corridors along major roadways.

When the area was last studied by the District in 1986, just over half of the area was developed, with about one third of the area within the jurisdiction of Maricopa County. Over the past 25 years, most of the area has been developed and the entire area has been annexed by Phoenix. As a result, the population in the area has increased dramatically. There are approximately 47,500 structures in the study area and the estimated population is 97,500. The study needs to be updated to reflect the changes in the area using updated, detailed 2-foot contour mapping and a more technically sound approach to hazard identification.

The purpose of the study is to investigate, identify and assess existing flooding problems. A comprehensive list of known flooding problems impacting the study area will be developed through flooding information provided by the city of Phoenix, as well as a review of previous drainage studies that have identified drainage issues. Public meetings will also be held to gather information on flooding problems from study area residents.

A comprehensive FLO-2D model will be developed using the updated 2-foot contour mapping developed for the study. The 100-year and 10-year 6- and 24-hour storms will be considered. The final products of the FLO-2D models will be a series of maps depicting flow rates and flow depths for the study area.


ADMS study started in March 2015. Initial data collection and modeling efforts are complete. The consultant is working on the final modeling efforts. The District is working with the City of Phoenix and the consultant to identify and develop potential solutions for a few select areas. On June 13, 2017 a presentation was made to the Northtown HOA Board. On June 21, 2017 there was a meeting with the property owners along Sandra Terrace and Paradise Lane between 14th and 16th Street.

The consultant has been developing smaller less costly mitigation measures for the Northtown Area that could offer relief from more frequent flood events. The consultant is completing the final versions of the various FLO-2D models and refinements to the Hazus model.

The contract ended in December 2017. The consultant prepared Fact Sheets for two areas showing potential solutions to the flooding problems. The Fact Sheets will be shared with City of Phoenix, the Northtown HOA Board of Directors, and residents in the Baptist Church/Sandra Terrace area. All of the study findings and modeling results will be shared with the City of Phoenix, and also placed in the District's library. The District isn't planning to do any additional work in this area. If asked we will meet with the City and others to go over the results of the study.

Available Documents

Document Name Type Size
FEMA - Homeowner Guide To Retrofitting - Brochure 2009 PDF 1 MB
FEMA - Homeowner's Guide To Retrofitting - Publication 2014 PDF 54 MB
FEMA - Protecting Building Utility Systems From Flood Damage PDF 39 MB
Northtown HOA Board PowerPoint Presentation June 13, 2017 PDF 4 MB
Sandra Terrace Area PowerPoint June 21, 2017 PDF 5 MB
Study area map PDF 1 MB
Study Area Map 2017 PDF 0.2 MB

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