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McMicken

Location: Surprise, Arizona
Client: Flood Control District of Maricopa County

McMicken Dam Spillway Delineation Study

Hoskin Ryan performed spillway inundation studies for flows over the emergency spillway of McMicken Dam; an earthen dam located northwest of the intersection of Grand Avenue and the Loop 303 Freeway. This detailed study covered portions of the cities of Surprise and El Mirage, and Luke Airforce Base. Hoskin Ryan provided mapping coordination and production, hydrology, and HEC-RAS analysis in combination with flow split and weir flow analyses to identify potential inundation limits. Floodplain delineations were prepared for overtopping flows of the one-third, two-thirds, and full discharges.
Project Requirements / Unique Characteristics:

  • Rural & Urban Floodplain Analysis
  • Large Mapping Area
  • Split Flow Analysis