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<br /> <br />CHANNEL EASEMENTS WIDTHS <br />I Total R.O.W. or Easement <br /> <br />. . <br />. . <br />width . <br /> <br />Channel <br /> <br />Q'00 less than 20 cfs <br /> <br /> <br />Q'00 less than 100 cfs <br /> <br /> <br />Q'00 greater than 100 cfs <br /> <br />1:> feet <br /> <br />2:> feet <br /> <br />Minimum widt:h calculated to <br />include freeboard plus 12-foot <br />wide access road, The city shall <br />determine if access is required <br />on both sides of channel. <br /> <br />5.9 Checklist <br /> <br />To aid the designer and reviewer, the following checklist has been <br />prepared. <br /> <br />1. Check flow velocity with the low retardance factor and <br />capacity with the high retardance factor. <br /> <br />2. Check the Froude Number and critical flow conditions. <br /> <br />3. Grass channel sidE~ slopes must be 4H: IV Dr flatter, unless <br />approved by the city. <br /> <br />4. Show the energy grade line and the hydraulic grade line on the <br />design drawings. <br /> <br />5. Consider all backwa.ter conditions at culverts when determining <br />channel capacity. <br /> <br />6. Check the flow velocity for flood conditions wi.thout backwater <br />effects. <br /> <br />7. Provide adequate freeboard. <br /> <br />8. Provide adequate right-of-way for the channel and continuous <br />maintenance access. <br /> <br />5 - 20 <br /> <br />I <br />I 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 />