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cl. CONCRETE <br />t <br />TROWEL FINISH <br />0.011 <br />2. <br />FLOAT FINISH <br />0.01 3 <br />3. <br />G"UNiTE, GOOD SEC-TiON <br />0.016 <br />4. <br />%C'UNITE, WAVY SECTION <br />0.018 <br />b. CONCRETE BOTTOM FLOAT FINISHED WITH SIDE OF <br />1. DRESSED STONE IN MORTAR 0,015 <br />2. RANSOM STONE IN MORTAR 0.017 <br />3. DRY RUBBLE OR RIPRAP 0.020 <br />C. GRAVEL BOTTOM NTH SIDES OF <br />1. FORMED CONCRETE <br />2, RANDOM STONE IN MORTAR <br />3, DRY RUBBLE OR RIPRAP <br />d. ASPHALT <br />1. SMOOTH <br />2. ROUGH <br />e. GRASSED <br />• <br />CHOW, V.T., OPEN CHANNEL HYDRAULICS <br />MCGRAW HILL BOOK COMPANY IQ—% <br />0.0}13 <br />0.015 <br />0.015 <br />0.016 <br />0.019 <br />0.023 <br />0,022 <br />0.023 <br />0.017 <br />0.020 <br />03.020 <br />0.024 <br />0.030 <br />O.C35 <br />0.020 <br />0.025 <br />CM 3 <br />0.026 <br />0,033 <br />0.036 <br />0.013 <br />0,016 <br />0.040 0.050 4 <br />