Orestimba Creek Feasibility Study - Stanislaus County

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Economics Appendix – Draft Report - Orestimba Creek Feasibility Study, Stanislaus County, California – September 2012 This page was left blank to facilitate two-sided photocopying.
Economics Appendix – Draft Report - Orestimba Creek Feasibility Study, Stanislaus County, California – September 2012 Executive Summary – Economics – Orestimba Creek Feasibility Study ES.1 Overview The study area is located in the southwestern portion of Stanislaus County, in what is referred to as the Newman Division by the U.S. Census Bureau (see Figure 1). Orestimba Creek stretches approximately 7.5 within the study after having left the foothills of the Diablo Mountain Range. It is estimated that in the 500-year flood event the floodplain would encompass approximately 20,000 acres, including the City of Newman (see Error! Reference source not found.). The City of Newman is the home of approximately 12,321 residents (2010 Census data). The study area is home to some of California’s most efficient and important agricultural industries. Tomato and vegetable processing, cheese manufacturing, and turkey hatching are examples of some of the agricultural industries located in the area. The area is acknowledged for crop diversity and productivity, which can be accredited to a combination of exceptional factors such as, soil quality, air quality, climate, and water supply. The city of Newman has experienced 14 floods in the past 58 years (1954, 1955, 1957-1959, 1963, 1968, 1969, 1978, 1980, 1983, 1986, 1995 and 1998). The major floods occurred in 6 out of the last 14 flooding events (1955, 1958, 1963, 1980, 1983, 1995 and 1998), with 1995 being the flood of record. These floods occurred along Orestimba Creek and affected both rural and urban land uses. The frequency of flooding in and around Newman is similar that which occurs on an average cycle of between 4 to 5 years. These flooding events have affected the same general areas each time except when there was a levee failure or similar occurrence that changed the location of flooding and the type of land uses that were adversely affected. ES.2 Purpose and Scope of Economic Analysis The purpose of this report is to present the results of the economic analysis performed for the Feasibility Study of the Orestimba Creek Project. The report documents the existing condition within the study area and proposed alternative plans to improve flood risk management, and designate the National Economic Development (NED) Plan for purposes of estimating federal interest for Orestimba Creek. The report presents findings related to flood risk, potential flood damages and potential flood damage reduction benefits. This Economic Appendix is intended to: • Document the current hydrologic data used in the economic analysis for the Orestimba study area under both the without-project and with-project conditions • Document the current hydraulic floodplains and HEC-FDA hydraulic input data used in the economic analysis for the Orestimba under both the without-project and with-project conditions ES-i
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Orestimba Creek Feasibility Study - Stanislaus County

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