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100-year floodplai~ and the 500-year floodplain. Since the base map for Survey control markers exist in the field in the vicinHy of Lefthand the Flooded Area plates is a2' contour map, the outlines of the other Creek and its associated floodplain area. A sUrMlary of these control markers and their locations is given in Table 8. flood events can be readily plotted using the information in Table 7. The area delineated on the Flooded Area plates as the 100.year i I I floodplain meets the requirements of H.B. 1041 <IS an area of state interest. Also, upon official approval of thls report by the Colorado F1oodlnsur<lnce Water Conservation Board, the area outlIned by the 100.year flood The National Flood Insurance Program is a Feder<ll program that enables property owners to buy flood insurance at a reasonable subsidized boundary will be designated a floodplain area and may be regulated accordingly by the local officials. cost. In return, communities are required to carry out floodplain management measures to protect lives and new construction from future flooding. Flood Elevations FlOOd insurance through the National Flood Insurance Program is available to all residents of Boulder County and the CHy of Longmant Flood crest elevations for the 10-,50-,100-, and 500-yearfloods may be found in three separate locations in this report. Jhe Flood elevations at selected reference points. The Flooded Area Plates 3 under tOe regular phase of th, program. Boulder entered tOe regular program February " 1979 00' th, City ,f Longmant entered '0 July 5. 1977. A Flood Insurance summary is shown io Table 9. Additional information " th, FlOOd Insurance Program i, available from local insurance agents " brokers and the , Frequency-Elevation and Discharge Data table (Table 7) lists these through 16 give the phn view of the flooded area on a contour base map and the high water elevations for the lOO-ye<lr f100d can be interpolated from thh. ihe Flood Froii1e Flates 17 through 19 show the streambed elevation and the high water elevations for all four fr~quency floods. The flOOd profiles may be used in areas where controversy arises over Federal Emergency Management Agency Division of Insurance and Mitigation Denver Federal Center, Building 710 Lakewood, Colorado 80225 Telephone; 234.6582 the JOO-ye<lrflood boundary on the Flooded Area plates. Since the flood profile plates give the elevations and distance or stationing from a known point, the h1gh water elevations can be surveyed on the ground to alleviate any discrepancies on the base map. , 9