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JURISDICTIONAL DELINEATION REPORT FAIRVIEW STREET IMPROVEMENTS A <br />N OVEMBER 2018 FROM 9TH STREET TO 16TH STREET AND BRIDGE REPLACEMENT PROJECT `J" <br />SANTA ANA, CALIFORNIA <br />SITE DESCRIPTION <br />The project site is located on the United States Geological Survey (USGS) 7.5-minute Anaheim, <br />California, topographical quadrangle series map. Land uses adjacent to the project include <br />residential to the north, south, east, and west. The tops of the Santa Ana River banks are part of the <br />Santa Ana river trail system and are used recreationally. <br />The Jurisdictional Delineation Limits coincide with the Biological Study Area (BSA) limits and were <br />used to map and assess potentially jurisdictional aquatic resources that could be directly or <br />indirectly affected by the proposed project (see Figure 2). Elevations in the Jurisdictional Delineation <br />Limits range from approximately 80 to 95 feet (ft) above mean sea level. The topography of the <br />Jurisdictional Delineation Limits gently slopes downhill from east to west between 17th Street and <br />5th Street. <br />The regional climate is classified as Mediterranean (i.e., arid climate with hot, dry summers and <br />moderately mild, wet winters). The average annual precipitation is 13.6 inches. Although most of <br />the precipitation occurs from November through March, thunderstorms may occur at other times of <br />the year and can cause extremely high precipitation rates. On average, monthly high temperatures <br />range between 69 degrees Fahrenheit (°F) and 85°F, and monthly low temperatures range between <br />46°F and 647. <br />The Jurisdictional Delineation Limits are within the Santa Ana River Watershed, which covers an area <br />of approximately 210 square miles in Orange County. The headwaters of the entire 2,650-square- <br />mile Santa Ana River Watershed begin in the San Bernardino Mountains and cross Riverside and <br />Orange Counties before ultimately entering the Pacific Ocean. Flows within the Santa Ana River can <br />be attributed to general winter storms and local storms within the Santa Ana River Watershed. <br />Urban runoff and wastewater treatment plants also contribute to flows within the Santa Ana River. <br />\\vcorp12\projects\WKE1702\N ES- MI\November 2018 Sub mittal\Fairview Street I m proveme nts_Draft JD 110918.docx all/09/18» <br />