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<br />CERTI FICA TI ON <br /> <br />MAPS AND SURVEYS <br /> <br />Aerial photography and topographic maps for this study were provided by Del- <br />ta Aerial Surveys. Mapping at the scale of I inch = 200 feet with 2-foot <br />contour intervals was prepared by Delta Aerial Surveys under a contract with <br />the Urban Drainage and Flood Control District. The ground control survey <br />was performed to 3rd order accuracy standards or better as defined by the <br />U.S. Department of Commerce, Federal Geodetic Control Committee. Mapping in <br />this study complies with the "United States National Map Accuracy Stand- <br />ards. " <br /> <br />This Flood Hazard Area Delineation Report, South Platte River, Denver Metro- <br />politan Area, was prepared under the supervision and direction of the under- <br />signed whose seal as a professional engineer is affixed: <br /> <br />The cross sections for the study were obtained by photogrammetic and field <br />survey methods. These cross sections, whose alignments are shown on the <br />mapping, were used in the hydraulic calculations by using the HEC-2 program <br />to determine the water surface profiles shown in this report. All bridges <br />and other significant structures that might divert or restrict flows signi- <br />ficantly were field surveyed. Additionally, because the digitized cross <br />sections indicate water surface elevations, some cross sections were cor- <br />rected by field measurements to reflect streambed elevations. <br /> <br /> <br />f'!tnf!1r <br />ROBfR~?> <br />...... li'Li' <br />.:"t.G\STE:Ji'€.. "T~~ <br /><.::~... ~ <> ...~ <br />... .. 3084 i ~ <br />"'" ;0 Q::- *: <br />o l<.i- ... <br />.~ ~~.. :: <br />JI...oS',s .(',.'.-...: <br />~:.~ON"'l_ 'i.~..~'\.\J .... <br />~7"r ....... ,y...v.... <br />"'~ GF co\..G~".."" <br />........u',,' <br /> <br />IL~ <br /> <br />Kenneth R. . t, Presldent <br /> <br />The following members of the Wright Water Engineers, Inc., staff contributed <br />to the preparation of this report: <br /> <br />Str'earn stationing is based on "Flood Hazard Delineation, South Pl atte River, <br />Adams County" completed in September 1977. <br /> <br />Principal Engineer <br />Project Engineer <br />Hydrologist <br />Hydraulic Engineer <br />Technician/Draftsman <br />Technical Typist <br /> <br />Kenneth Wright, P.E. <br />Curt Chandler, P.E. <br />Mark Glidden, P.E. <br />Denny Tuan, P.E. <br />Peter Moros <br />Alice Duray <br />