Laserfiche WebLink
<br /> <br />9 <br /> <br />10 <br /> <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 /> <br /> <br />SOURCES OF DATA AND TECHNICAL STUDIES <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />1 <br />I <br />I <br />I <br />I <br />I <br /> <br />Maps <br /> <br />Peaceful Valley Road trossing at Jimmy Camp Creek, <br /> <br />Base maps were develope~ from U.S. Geological Survey topographic <br /> <br /> <br />maps (scale 1:2~,000). Flood hazard areas are plotted on aerial photo- <br /> <br /> <br />mosaic maps prepared especially for. this study. The low level aerial <br /> <br /> <br />photography was provided by EI Paso County and was flown In May 1973. <br /> <br /> <br />Detailed topographic mapping and cross-section data were produced photo- <br /> <br /> <br />grammetrlcally by the Soil Conservation Service. This data was used to <br /> <br /> <br />compute water surface profiles and the flood hazard area outlines. The <br /> <br /> <br />photos were reproduced on a scale of I" = 400' with a 4-foot contour <br /> <br /> <br />Interval and 2-foot supplementary contours in the flatter areas. Map <br /> <br /> <br />topography complies with national map accuracy requirements. The photo- <br /> <br /> <br />graphic image: contains displacements due to relief and it does not match <br /> <br /> <br />the topographic detai I in all areas. <br /> <br /> <br />Surveys <br /> <br />Engineering field surveys for vertical and horizontal control, and <br /> <br /> <br />cross-sections at road and bridge crossings were conducted by the Soil <br /> <br /> <br />Conservation Service. Survey crew assistance was provided by EI Paso <br /> <br /> <br />County. The vertical control was tied to mean sea level elevations <br /> <br /> <br />using U.S. Geological Survey and U.S. Coast and Geodetic Survey bench- <br /> <br /> <br />marks. Soils and cover data pertinent to the Jimmy Camp Creek watershed <br /> <br /> <br />were extracted from SCS reports for El Paso County and field checked for <br />use in the hydrologic analyses. <br /> <br />~ridge repair on Link Road and Jimmy Camp Creek <br />FLOOD DAMAGES -- JULY 18, 1972 <br /> <br />