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<br />insurance rating purposes. For construction and/or floodplain management purposes, <br />users are cautioned to use the flood elevation data presented in this FIS in conjunction <br />with the data shown on the FIRM. <br /> <br />The following streams were restudied by TC&B under Contract <br />No. EMC-1999-CO-OO39. <br /> <br />Burgess Creek <br /> <br />Cross sections utilized by TC&B were based on new field surveys performed by <br />Mountain Surveying and Mapping (MSM), topography from the City of Steamboat <br />Springs with 2-foot contour intervals (Reference 22), a USGS Quadrangle topographic <br />map with 40-foot contour intervals (Reference 15), and supplemental field surveys <br />performed by Survcon Inc. (Survcon). <br /> <br />The starting WSEL at the downstream end of the study reach was based on the <br />WSEL at the confluence with Walton Creek. The hydraulic analyses submitted by <br />TC&B were revised by FEMA based on more detailed topographic information and <br />revised culvert data submitted with the October 29 LOMR request. In a report <br />provided by DB (DB report), topographic information was provided on a map <br />entitled "LOMR 100- Year Floodplain Limits," at a scale of 1 " = 10' with contour <br />intervals of 1 foot. Revised culvert information was provided in Figures 1, 2, and 3 <br />of the DB report. <br /> <br />Elk River <br /> <br />Cross sections utilized by TC&B were based on new field surveys performed by MSM, <br />topography from the City of Steamboat Springs with 2-foot contour intervals <br />(Reference 22), and USGS Quadrangle topographic maps with 40-foot contour intervals <br />(Reference 15). The starting WSEL at the downstream end of the study reach was <br />based on the WSEL at the confluence with the Yampa River. <br /> <br />Walton Creek <br /> <br />Cross sections utilized by TC&B were based on new field surveys performed by MSM, <br />topography from the City of Steamboat Springs with 2-foot contour interval <br />(Reference 22), a USGS Quadrangle topographic map with 40-foot contour intervals <br />(Reference 15), and supplemented field surveys preformed by Survcon. <br /> <br />Starting WSELs at the downstream end of the study reach was based on the WSEL at <br />the confluence with the Yampa River. <br /> <br />Yampa River (Town of Hayden) <br /> <br />Cross sections utilized by TC&B were based on new field surveys performed by MSM <br />and a USGS Quadrangle topographic map with 40-foot contour intervals <br />(Reference 15). <br /> <br />31 <br />