You can read more information for the FEMA CTP program in this document: CTP Overview.This area is a complex confluence of Richardo Wash, Fort Mohave Wash, Fox Wash, Soto Wash, and Bojorquez Wash. This project will involve revising FEMA floodplains for an area north of the Bullhead Parkway Extension near the Target Center. The 2018 project consists of developing additional flood mitigation infrastructure concepts, public outreach, and revising FEMA floodplains for a tributary to Davis Wash, Desert Canyon Wash, and Montana Wash. The model was also used to revise FEMA floodplains for Boat Ramp Wash, Big Montana Wash, Havasupai Wash and Tributary 1. The ADMS model was used to identify flooding problem areas and evaluate flood mitigation infrastructure concepts. This includes an inventory of significant drainage structures such as culverts, storm drains, levees, and channels. This project consisted of enhancing the City-wide hydraulic software model to a detailed Area Drainage Master Study (ADMS) model. The 2016 CTP project included the re-delineation of FEMA floodplains for Silver Creek, Secret Pass Wash, and Dump Wash from the Colorado River to a logical point upstream (e.g. The estimates were conducted for various recurrence interval such as the 1% Annual Chance flood (aka the 100-year flood). The hydrologic modeling estimates the amount of stormwater or floodwater runoff that flows and is routed through the City’s watercourses. This was last performed by FEMA in 2004 using older techniques and methodologies. This project consisted of developing City-wide hydrologic and hydraulic software modeling.
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