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<br />5. <br /> <br />Concrete Finish (Small Drainageway) <br /> <br />The surface of the <br />wood float finish. <br />shall be avoided. <br /> <br />concrete lining shall be provided with a <br />Excessive working or w,~tting of the finish <br /> <br />6. <br /> <br />Concrete Curing (Small Drainageway) <br /> <br />All concrete shall be cured by the <br />membrane forming curing compound <br />completion of the concrete finish. <br /> <br />appUcation of a liquid <br />(whit:e pigmented) upon <br /> <br />7. <br /> <br />Reinforcement Steel (Small Drainageway, where appropriate) <br /> <br />a. Steel reinfo:::cement shall be minimum grade 40 deformed <br />bars. Fabric mesh may also be apprIJvl!d. wire mesh shall <br />not be used. <br /> <br />b. Ratio of longitudinal steel are,a to concrete cross <br />sectional are,a shall be greater than 0.005. <br /> <br />c. Ratio of tl:'ansverse steel area to concrete cross <br />sectional area shall be greater than 0.0025. <br /> <br />d. Additional sb!el shall be placed as needed if a retaining <br />wall structure is used. <br /> <br />8. <br /> <br />Earthwork (Small Drainageway) <br /> <br />The following areas <br />maximum density as <br />Proctor) : <br /> <br />a. The 12 inches of subgrade immediately blmeath concrete <br />lining (both channel bottom and side slopes). <br /> <br />shall be compacted 1:0 at least 95% of <br />determined by ASTI1 D'-698 (Standard <br /> <br />b. Top 12 inches of maintenance road. <br /> <br />c. Top 12 inches of earth surface within 10 feet of concrete <br />channel lip. <br /> <br />d. All fill material. <br /> <br />9. <br /> <br />Bedding (Small Drainageway) <br /> <br />Provide six inches of granular bedding equivalent in gradation <br />to %-inch concrete aggregate (standard Sp~ifi&ations for Road <br />& Bridae Constructiml, CDOT, latest revision) under channel <br />bottom and side sl,)pes. <br /> <br />10. <br /> <br />Underdrain (Small Drainageway) <br /> <br />Longitudinal underdrains shall be provide,d and shall daylight <br />at the check drops. Weep holes shall be provided in vertical <br />wall sections of the channel. <br /> <br />5 - 16 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />