The objective of this Technical Data Notebook is to provide 100-yr peak discharges at a Concentration Point for the Unnamed 02 and 03 Washes, 100-yr floodplain boundary and erosion hazard information, using the most up-to-date topographic, hydrologic, and hydraulic data. This is a local study and has not been submitted to FEMA.

This memorandum describes (1) the potential applicability to Pima County of a national initiative to institute reforms in floodplain management; and (2) an assessment of the effectiveness of Pima County's Riparian Habitat Mitigation Ordinance (attachment). An inter-departmental team was formed to formulate specific proposals for consideration as part of the Riparian Protection Element of the SDCP and the major plan amendment to the County's comprehensive plan.

The District's Coordinated, Comprehensive, Collaborative Flood Hazard Mitigation Partnering (C3FHMP) effort addressed Strategic Initiative No.3 of the Flood Control District of Maricopa County 2009 Comprehensive Plan: Increase Collaboration and Partnerships. The District initiated the process to determine how the funding and resources of other entities could be best applied to mitigate flood hazards in Maricopa County, or where mutual benefits would be realized.

This study is intended to assess flood risk, and identify flood hazards based on those risks, for the Beaver Dam area from the Beaver Dam Wash. The hydrologic and hydraulic results are intended for risk assessment and emergency management purposes only. The results of this study should not be considered as “best available technical information” for floodplain management purposes.”

The Flecha Caida study area encompasses approximately eight square miles of the foothill region of the Santa Catalina Mountains. The three major washes studied include Finger Rock Wash, Valley View Wash, and Flecha Caida Wash. One tributary (Sky Club Wash) to the Valley View Wash and three tributaries to the Finger Rock Wash were also included in this study.