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Bridqes Across the Stream There are a total of five vehicular bridges and two railroad bridges across Fountain Creek in the 21..48 mile study reach. Photographs of the br.i.dges arEl shown in Figures 2 through 4. The Pi'non County Road Bridge at Mile l4.95 is the only bridge in the upper portion of the study reach. The College Road Bridge on Colorado State Highway 47 .i.s 10cat8d at Mile :\.98 near thEl northern outskirts of Pueblo's, urban area. The U.S. Highway 50, 8th Street, and 4th Street vehicular bridges are .i.n Pueblo at Miles 2.65, 1.69, and 1.43, rElspectiv8ly. The Atchison, Top8ka, and Santa fe Railway and Missouri Pacific Railroad bridges are just upstream of the fountain CreElk-Arkansas Riv8r confluencl3 in Pueblo at Miles 0.81 and 0.44, respectively. Table 2 lists pertinent elevations for the bridges, and shows their relation to the crests of the Standard Project flood and Intl3rmediate Rel~ional flood. Two of the factors affecting the depth of flow at bridges during a flood are the degree of structural obstruction and waterway opening clogging. These conditions cannot be accurately forecast; so it is assumed that all b,ridge structur8s will stand and limited clogging is to be expected .,hich may change estimated flood limits. The Pinon County Road BridgEl is a 4oo-foot l3-span structure. The roadway would lack 0.2 feet of being overtopped by the Standard Project flood, and 4.2 feet by the Intermediate Regional flood. Head losses at the bridge would be 7.3 feet during the Standard Project Flood and 6.3 fest during the Intermediate Regional flood. The recently constructed Colorado State Highway 47 traverses the fountain Creek flood plain over two bridges and a high approach fill. The larger bridgEl is a 350-foot 4-span structure over the creekbed; the smaller 21o-foot 4-span structure is a viaduct for railroad tracks. ThE! Standard Project flood would overtop the roadway by 3.9 feet, and the Intermediate Regional 14