Laserfiche WebLink
<br />included pre-project and post-project floodplain maps for the lOa-year flood and the Standard <br />Project Flood and included a reference to an Appendix II, "Hydraulic Design". The Corps could <br />not locate the Detailed Project Report or the Hydraulic Design Appendix, <br /> <br />The Corps published a Special Flood Bazard InJorrnation Report for Wolf Creek, Granada, <br />Colorado, dated April 1974. This report included floodplain maps and water surface profiles for <br />an Intermediate Regional Flood and a Standard Project Flood based on floodplain conditions <br />existing in 1974. Post-project IRF and SPF conditions were also included based on a proposed <br />flood control project for the Town, <br /> <br />The Board designated and approved on D(~cember 4, 1974, (Floodplain Resolution Index <br />Number 39) .., "as flood hazard areas those areas described as being inundated by an intermediate <br />regional flood as set forth in the Floodplain Information Report for Wolf Creek, Granada, <br />Prowers County, Colorado, dated April 1974".., <br /> <br />The Corps published a Special Flood Hazard Information Report for the ,Arkansas River <br />and tributaries from Great Bend, Kansas, to John Martin Dam, Colorado, dated June 1974, This <br />report included floodplain maps and water surface profiles for an Intermediate Regional Flood <br />(IRF) and a Standard Project Floodl (SPF) t>ased on floodplain conditions existing in 1974, <br /> <br />The Board designated lmd approved en February 26, 1975, (Floodplain Resolution Index <br />Number 40) as floodplain areas those areas along the Arkansas River described as being <br />inundated by a lOa-year flood as set forth in the Corps June 1974 report These areas were near <br />but did not include the Town of Granada. Tile Corps SPF floodplain area did, however, include <br />the Town. <br /> <br />The U.S. Department of Housing and Urban Development (HUD) prepared and published <br />on Jnly 18, 1975, an approximate floodplain map (Flood Hazard Boundary Map) for the Town <br />of Granada. This map showed a major portion of the corporate limits of the Town as being in <br />the lOa-year floodplain and subject to the ri~k of flooding. <br /> <br />Prior to construction of the Granada Flood ContTOl Project, the Corps prepared drawings, <br />dated March 1979, of plans for construction oflevt:es arid channel improvement These drawings <br />included the general plan, the levee and chanPel plan and profile, the outfall channel, structures, <br />and hydrographs of the Arkansas River. No water surface profiles or floodplain maps were <br />included with these drawings. <br /> <br />After the Project was completed in 1980, the Corps prepared an Inspection Date Document <br /> <br />lThe Intermediate Regional Flood (IRF) and Standard Project Flood (SPF) are: U,S, Army <br />Corps of Engineers nomenclature. The Corps defines the IRF as a laO-year flood, The Corps <br />defines the SPF as a flood that would be exceeded only on rare occasions and in many instances <br />defines the upper limit against which protection is sought. <br /> <br />3 <br />