Laserfiche WebLink
• <br />• <br />• <br />Page 2 of 3 <br />g. On good excavated rock 0.017 0.020 <br />h. On irregular excavated rock 0.022 0.027 <br />2. Concrete bottom float finished with sides of: <br />a. Dressed stone in mortar 0.015 0.017 0.020 <br />b. Random stone in mortar 0.017 0.020 0.024 <br />c. Cement rubble masonry, plastered 0.016 0.020 0.024 <br />d. Cement rubble masonry 0.020 0.025 0.030 <br />e. Dry rubble on riprap 0.020 0.030 0.035 <br />3. Gravel bottom with sides of: <br />a. Formed concrete 0.017 0.020 0.025 <br />b. Random stone in mortar 0.020 0.023 0.026 <br />c. Dry rubble or riprap 0.023 0.033 0.036 <br />4. Brick <br />a. Glazed 0.011 0.013 0.015 <br />b. fn cement mortar 0.012 0.015 0.018 <br />5. Metal <br />a. Smooth steel surtaces 0.011 0.012 0.014 <br />b. Corrugated metal 0.021 0.025 0.030 <br />6. Asphalt <br />a. Smooth 0.013 0.013 <br />b. Rough 0.016 0.016 <br />7. Vegetal lining 0.030 0.500 <br />C. Excavated or Dred ed Channels <br />1. Earth, straight and uniform <br />a. Clean, recently completed 0.016 0.018 0.020 <br />b. Clean, after weathering 0.018 0.022 0.025 <br />c. Gravel, uniform section, clean 0.022 0.025 0.030 <br />d. With short grass, few weeds 0.022 0.027 0.033 <br />2. Earth, winding and sluggish <br />a. No vegetation 0.023 0.025 0.030 <br />b. Grass, some weeds 0.025 0.030 0.033 <br />c. Dense weeds or aquatic plants in deep channels 0.030 0.035 0.040 <br />d. Earth bottom and rubble side 0.028 0.030 0.035 <br />e. Stony bottom and weedy banks 0.025 0.035 0.040 <br />f. Cobble bottom and clean sides 0.030 0.040 0.050 <br />3. Dragline-excavated or dredged <br />a. No vegetation 0.025 0.028 0.033 <br />b. Light brush on banks 0.035 0.050 0.060 <br />4. Rock cuts <br />a. Smooth and uniform 0.025 0.035 0.040 <br />file://C:\HEC\I-IEC-RAS\3.1.3\HelpTable_Mann.htm <br />4/24/2006 <br />