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<br />NOTES: <br /> <br />3, For Los Gatos Creek at the 1-5 bridges, preliminary analysis of <br />the March 1995 flood gave: <br /> <br />. Long term degradation <br /> <br />2.4 to 3 m (8 to 10 feet) from original (1967) bed elevation <br /> <br />. Contraction scour <br /> <br />3 m (10 feet) from BRI-STARS <br /> <br />2.6 m (8.5 feet) from Laursen's Live Bed equatiol1 <br /> <br />Bridge deck material was found buried 3 to 3.7 m (10 to 12 <br />feet) below the post-flood bed surface downstream from the <br />bridge <br /> <br />. Local pier scour <br /> <br />2.9 to 3.7 m (9.5 to 12.2 feet) using an angle of attack of 150 <br />and 260, respectively (with no the web wall), depth of flow y <br />'" 6.1 m (20 feet), velocity V = 3.4 m/s (11.3 ftIs), <br /> <br />Field estimates of angle of attack were 150 to 300. <br /> <br />Pier scour would be about 1.95 m (6.4 feet) for a single <br />column. <br /> <br />Effect of debris was not considered. <br /> <br />5.10 <br />