75C - PH - BRISTOL EIR FROM WARNER TO ST. ANDREW

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Mocho Loam 0.2% Slone. Well drained, on alluvial fan or flood plains. Moderately alkaline and calcareous throughout. Moderately permeable. Effective rooting depth of 60 inches or more. Low - moderate shrink -swell potential. IRgh risk of corrosion to uncoated steel; low risk of corrosion to concrete. Water table is greater than six feet deep. Depth to bedrock is greater than 60 inches. Available water capacity is 9.5.12 inches. San Emigdio Fine Sandy Loam 0-2% Slone. Well drained, occurring on flood plains and alluvial fans. If soil is bare, runoff is slow and the erosion hazard is slight. Moderately alkaline and calcareous throughout. Moderately rapid permeability. Available water capacity is 7 -9 inches. Water table depth is greater than six feet. Depth to bedrock is greater than 60 inches. Low shrink -swell potential. High risk of corrosion to uncoated steel; low risk of corrosion to concrete. Riverwash. Unconsolidated alluvium, generally stratified and varying widely in texture. Runoff is generally rapid and the erosion hazard is high. Deposition and removal of alluvium is common. Hueneme Fine Sandy Loam, Drained. Nearly level, on large alluvial Can or flood plains. Water table has been lowered by pumping wells or construction of flood control channels and is now permanently below 60 inches. If soil is bare, runoff is slow and the erosion hazard slight. Available water capacity is 7 -9 inches. Effective rooting depth is 60 inches or more. Low shrink -swell potential. Fligh risk of corrosion to uncoated steel; low risk of corrosion to concrete. HENE;frl IM Two portions of Bristol Street in the project area are subject to significant flood hazard, according to the Flood Insurance Study for Orange County and incorporated Areas, prepared by the Federal Emergency Management Agency (FEMA) on September 15, 1989. At the southerly end of the proposed project, from St. Gertrude Place to Warner Avenue, the project is influenced by a southeasterly trending area which is subject to overflow with a 1.0 foot flooding depth from a 100 -year flood from the Santa Ana River to the west (see Figure 12). At the northerly periphery of the project, Bristol Street is affected by overflow from the Santiago Creek Channel, which has the potential for overtopping its banks and the Bristol Street Bridge during a 100 -year storm. This channel is identified in the FEMA study as a floodway. III -7 75C -78