Projects

Project Name: Sunland Avenue Tributary Floodplain Delineation Study

Project Manager: Kathryn Gross
Contact by phone at (602) 506-4837 or by email

Project is in Supervisor District:

District 1: False
District 2: False
District 3: False
District 4: False
District 5: True

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Project Type: Study

Project Description:

The Flood Control District of Maricopa County (District) is conducting the Hydrology and Hydraulic Update for The Sunland Avenue Tributary Floodplain Delineation Study to remove and/or update existing Zone AE Floodplains (without floodway) along the Sunland Avenue Tributary. The study is comprised of two Phases. Phase I used improved mapping and modeling to generate updated Hydrologic and Hydraulic information for the entire drainage area that contributes runoff to the watercourse; Phase II recently began and will include the Floodplain Re-delineation and packaging for a Letter of Map Change request through FEMA.

The study is located within the western part of Maricopa County, and is generally bounded by the Loop 202 Freeway on the east, the I-10 Freeway the north, The Salt River on the south, and Avondale Boulevard (115th Avenue) on the west.

Once Phase II of the study is complete, impacted property owners will be notified and will be able to review the results online. The study results will then be submitted to the Federal Emergency Management Agency (FEMA) for review and approval and will eventually be incorporated onto the Flood Insurance Rate Maps (FIRMs) for the area. FIRMS are special maps that show flood hazards for an area. They are produced as part of the County’s participation with the National Flood Insurance Program (NFIP). It typically takes approximately 6 months to 1 year for FEMA to approve a study. Incorporation onto the FIRMs can take up to 1 additional year after FEMA approval. In the interim, the study information will be used as the best available data for regulation purposes.

Last Updated: 12/11/2024 10:07:49 AM

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Project Documents

Document Name	Description	Document Type	Filesize	Posted On
Study Area	Image of the study area for the Hydrologic and Hydraulic Updates for the Sunland Avenue Tributary FDS. This represents the Phase I portion of the study.			3/23/2021 11:02:22 AM	View
Sunland Avenue Tributary Floodplain Detail	This shows the local area of the Sunland Avenue Tributary that will be re-delineated during Phase II of the project description.			3/23/2021 11:24:42 AM	View