Laserfiche WebLink
<br />~rater I;~levations for the IOO-year flood CC:-l be interpola.ted from this.. <br /> <br />The flood profiles, Plate 2, show the s!:reambed elevation and the high <br /> <br />water elevation for all four frequency floods. <br /> <br />Also, the selected cross <br /> <br />sections on Plate 3 show a graphical representation of the high water <br /> <br />elevations at valley cross sect:tons through(l"..:t the study reach. <br /> <br />The flood profiles may be used in areas t<lhe;~e controversy arisf~s over the <br /> <br />I DO-year flood boundary on the flooded i'r'.", plates, <br /> <br />Sfnce the flood <br /> <br />profile plates give the elevations and the 2istance, or stationj.pg, from a <br /> <br />known point, the high water elevHtions c;:;.1"1 be surveyed on the ground to <br /> <br />alleviate any discrepancies on the base map. <br /> <br />Control Markers (Benchmarks) <br /> <br />In order to locate points on the ground ::-c:ia.ting to information given in <br /> <br />this report, benchmarks set by federal a,q,enc i.e-s hHve heen identified in <br /> <br />the study area. <br /> <br />These benchmarks are t:'i.e::l to United States Coast ,and <br /> <br />GeodetIc Survey Lines 112 and 113. <br /> <br />In addi.,~:'i.()n, two control markers have <br /> <br />been set in the field at strategic loc:at1.clnr hy the mapping contractor at <br /> <br />the request of Boulder County. <br /> <br />The adclttional Boulder County control <br /> <br />markers are brass caps set in concrete. <br /> <br />yt'e locations of all benchmarks <br /> <br />and control markers are shown on the topog-:aph:lc maps prepared for this <br /> <br />study. <br /> <br />The coordinates, elevations, and several locations of the <br /> <br />benchmarks and control markers are .1 :istedh Table I,. <br /> <br />Additi.ona.1 survey <br /> <br />notes and monument descriptions are availt'r:J e for review at -(~Ie Boulder <br /> <br />County Public Works Department. <br /> <br />20 <br />