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<br />DATA <br /> <br />SOURCE <br /> <br />j <br />j <br />] <br />~ <br />j <br />J <br />j <br />J <br />j <br /> <br />Table 3--Data Requirements for Cul.ert Design. <br /> <br />HYDROLOGY <br />Pcak Flow <br /> <br />Stream gage analysis or calculated using <br />Rational Formula, SCS Method, <br />regression equations. etc. <br /> <br />Cht:ck Flows <br /> <br />Samc as for peak flow <br /> <br />Hydrographs (if storage routing is <br />utilizcd) <br /> <br />From stream gage information or synthetic <br />development methods such as SCS Method, <br />Snyder Method, or computer models <br /> <br />1 <br />.J <br />1 <br />. <br />1 <br />. <br />. <br />, <br />. <br /> <br />SITE DATA <br />Culvcrt Location <br /> <br />Bascd on site characteristics including <br />natural stream section, slope, and <br />alignment <br /> <br />. <br /> <br />Waterway Data <br />Cross Sections <br />Longitudinal Slope <br />Rcsistance <br /> <br />~ <br /> <br />Tailwatcr <br />Upstrcam storage <br /> <br />Field surveyor topographic maps <br />Field surveyor topographic maps <br />Observation, photographs, or calculation <br />methods <br />Field survey, maps <br />Field survey, maps <br /> <br />Dcsign Headwatcr <br />Critical points on roadway <br />Surrounding buildings or <br />structurcs <br /> <br />Roadway plans <br />Aerial photographs, surveys, or <br />topographic maps <br /> <br />. <br />. <br />~ <br />,~ <br />~ <br />J <br />j <br />~ <br />J <br />j <br />, <br />. <br />. <br /> <br />Roadway Data <br />Cross Scction <br />Profile <br />Culvert Length <br /> <br />Roadway plans <br />Roadway plans <br />Roadway plans <br /> <br />. <br /> <br />Rcgulatory Constraints <br /> <br />Floodplain and flood insurance regu- <br />lations for stream reach of interest <br /> <br />. <br />j <br /> <br />I~rbilrary Constraints <br /> <br />State or local regulations for culvert <br />installations <br /> <br />j <br />~ <br />~ <br />j <br />~ <br />1 <br /> <br />. <br />J <br />1 <br /> <br />. <br /> <br />. <br /> <br />24 <br /> <br />. <br />. <br />. <br />