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<br />, ' <br /> <br />, <br /> <br />'" <br /> <br />There is no opportunity for floods smaller than 20,000 to 30,000 cfs to escape from <br />the incised channel until it reaches the spillway of the debris basin at the junction of <br />, <br />Oakridge Drive and Barnard Drive. Photo 3 illustrates the steep incised canyon confining <br />the channel. The house next to Barnard Creek (not on the property in question) in the <br />bottom of the photo is approximately 10 ft higher than the creek bed. From the spillway, <br />the flood will sweep down Barnard Drive with a slope of nearly 11 % (Photo 4). It is the <br />intent of this request to show that it is impossible for the flow path to reach the future H- <br />Four Associates property from basin spillway. <br /> <br />- .-=.:r:~ <br /> <br />f <br />I <br />Photo 3. Downstream View (Looking West) Near the Canyon Mouth of Barnard <br />Creek Watershed <br /> <br /> <br />- ,...,.----.. <br /> <br />Several estimates have been given for the 100-year flood peak discharge. These <br />range from 47 cfs in the Gingery Associates FIS (1979) to 74 cfs for existing conditions and <br />678 cfs for "upper watershed deterioration" in the Davis County Report (1990). The <br />Barnard Creek flood hazard restudy (presently undenvay) will analyze the flood hydrology <br />to predict the 100-year event and delineate the flood hazard zone. For basis of this LOMA <br />request it is assumed that the 100'year flood peak discharge will be less than 1000 cfs for <br />the 1.44 mi2 drainage upstream of the debris basin, The maximum conceivable flood depth <br />for this discharge with a bulked flow frontal wave would be less than 12 ft and probably not <br /> <br />5 <br />