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<br />and cross section wi 11 be defined from the 1 inch equals <br />100 foot - 2 foot contour interval maps currently avail able <br />from the Town of Vail from a previous contract. Supplemental <br />sections and the dimensions of the bridge openings will be <br />obtained by field surveys. It is anticipated approximately <br /> <br />seventyfive additional sections will be necessary to obtain <br /> <br />the accurate sections required for the computer modeling. <br />The computer modeling will be accomplished by either <br />the Corps of Engineers HEC-2 program or an internally developed <br /> <br />q <br /> <br />backwater program that is based upon the same energy <br />continuity theorem but has somewhat more flexibility with <br /> <br />, <br /> <br />sub-critical flow. The selection of the more suitable <br />1__",,- <br /> <br />program for this particular stream will be defined after <br /> <br />-? <br /> <br />the geometry of the model is fully established and the <br /> <br />applicability of the two programs can be fully compared. <br />The results of the channel routing will be presented on <br />,.~ reproducible drawings complete with identification of problem <br />reahces and/or bri dges. Cri ti ca1 reaches wi 11 be discussed <br /> <br />I .. <br /> <br />\ " <br />, as to possible remedial programs, <br /> <br />VI. FLOOD DAMAGES AND IMPROVEMENT COSTS <br /> <br />The problem areas, where infringement into the flood <br /> <br />plain or where excessive velocities may create hazardous <br /> <br />conditions for major floods, will be evaluated as to possible <br /> <br />solutions and the costs of these solutions. A relationship <br />