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CCtnENTS IntroducTIon Basin and Stream Characteristics Development on the Flood Plain Flood History In Study Reach Potential Floods Hazards of Large Floods Glossary of Terms Authority, Acknowledgements and Interpretation of Data ~ , , , , 5 7 10 TABLES Table I Flood Peak Discharges on Bear Creek 2 Intermediate Regional Flood Discharges Bear Creek 3 FloOd Plain Reference Data, Bear Creek Page , PLATES Title Number B<lslnM",pandPletelndoxM"p Flooded Areas Profiles Cross Sections 2-' '-5 7-10 , " 7 " Introduction A previous study of this area was Included In a report published In January 1966 as Flood Plain Info~tlon Report, Metropolitan Region, Denver, Colorado, Volume III, Bear and Clear Creeks. Hydrologic and hydraulic studies made In conJunction wIth the authorized Bear Creek Lake proJect, which included the hydrologic experience of the 1965 flood, have resulted In II revised defln.ltlon of the flood potential In the study reach. ThIs report, requested by the Colorado Water Conservation Board, presents the reSults of the revised work, partic- ularly as to changed flood stages and redefined flooded areas under conditions of development in 1970. The Intermediate Regional and Stand- ard ProJect Floods, defined In the Glossary. are used to Illustrate the flood hazard potential. These two floods should be given appropriate consideration In planning for safety of developments In the flood plain. Flooded area maps show the approximate areas that would be flooded under current conditions by the two potontlel floods. Profiles IndIcate the depths of potential floods relative to the streambed and to bridges, and Show the elevatIons that represent the flood water surface across the wIdth of the valley. Cross sections show relative ground and flood levels across the valley at selected points along the stream. The use to which flood plain information ...111 be put, such as zonIng or other regulations, Is the responslblll1"y of local authorities. The lrdorrnatlon given in this reportd09s not 1~lyany FedElral Interest or authority to zone or regulate use of the flOOd plains, nor should it be coostrued as OOl,lgatlng tha Govarnment to Investlgata, construct or maIntain any facility discussed in the report. The OrMhll District, Corps of Engineers ...111 provlda, upon request, technical assistance to Faderal. Sfate and loeel agencies In the InTerpratatlon and use of the Inforrratlon contelnad In tnis report. A pamphla+ "Guidelines for Reducing Flood Osrnages." and a booklat "Introduction to Flood Proofing" can be suppllad. Basin an4 Stream Characteristics 5ear Creek drains 261 square miles and Joins the South Platte River at Sheridan, Colorado, a southwest suburb of Denver. The basin Is about