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~- ;c ~. :_t>~ . and "f"lood pron", tracts". Structures are not allowed in the "f"loodway" but may be constructed in the "low hazard district" , with special restrictions. Special studies are required by the developer of" "f"lood prone tracts" to. identif'y hazards the develop- ment may impose. County subdivision regulations require the con- struction of" detention ponds designed to assure that development of" the subdivision will not increase runof"f". The Soil Conservation Service has prepared a f"lood plain inf"ormation repprt on the f"lood plain of" Boxelder Creek. Based on that report, the Larimer County Board of" Commissioners requested and the Colorado Water Conservation Board approved designation of" the f"lood plain of" Boxelder Creek that still would be subject to f"looding by runof"f" f"rom a lOO-year storm af'ter completion of" improvell1ents proposed in the watershed ."ork plan as a f"lood prone area. This will permit zoning and regulation of" the f"lood plain area near the mouth of" the creek where residential and commercial development has taken place and where channel improvement was considered but not included in the work plan. EMERGENCY EVACUATION The Denver.of"f"ice of" the National Weather Service provides general f"lash-f"lood warnings, f"or a region which includes the Cache 1a Pou<ire River basin. These warnings are issued whenever rainf"all reparts or radar indicate that heavy rains capable of" producing high runof"f" have occurred or are occurring. Special f"orecasts of" severe storms or rapiq snowmelt are made when warranted. These warnings, .to the extent that. they are heeded, may. be of" signif"icance in reducing f"lood damages. 18