FLOOD10617 (2) - Laserfiche WebLink

Home Browse Search

The 26th Avenue Crossing culvert and drop structure have been constructed and are designed to contain the lOO-year floodflow (Reference 17). The pond east of 47th Street will have little effect on the lOO-year peak flow. Three adjacent detention ponds on Elmers Twamile Creek were constructed by the City to control runoff. These ponds are located just south of Iris Avenue behind the K-Mart store. These ponds will attenuate the lOO-year peak flood discharge from 615 to 510 cfs. A small detention/siltation pond on Twamile Creek just upstream of Linden Avenue will control moderate flows; however, it does not attenuate the lOO-year peak floodflow. Flood protection measures along Skunk Creek consist of several detention/siltation ponds OD the u.s. Bureau of Standards property west of Broadway and the channelization of the stream between Morehead Avenue and u.s. Highway 36. The detention ponds are small and silted in and, therefore, were not modeled. The improved Bear Canyon Creek channel along Table Mesa Drive from Broadway to Gillespie Street (upstream Limit of Detailed Study) will efficiently convey moderate floodflow downstream; however, major storms will continue t cause flooding problems. The channel improvements in Martin Park completed under a recent UDFeD maintenance project were not designed to contain the lOO-year floodflow in the channel (Reference 24). Flood protection measures along Goose Creek include channelization of North and South Goose Creek. Flood protection measures along Dry Creek include channelization and construction of a new bridge at Flatirons Parkway (Reference 25). Flood protection measures along Fou~le Canyon Creek include channelization through the Palo Park Subdivision (Reference 26). No flood protection structures or measures exist or are planned for the flooding sources of Jamestown. No flood protection structures exist or are planned within and adjacent to the City of Lafayette. The City of Lafayette has building ordinances along the floodplains which prohibit certain types of construction. There is little evidence of flood protection measures along the study segment of St. Vrain Creek in the Town of Lyons, except the channelization between Sunset Street and the Colorado and Southern Railroad Bridge. There is a line of low levees along the trailer park on the south side of this segment. There are three dams in the upper mountain segments of St. Vrain Creek. Button Rock Dam was completed on North St. Vrain Creek in 1969, 6 miles west of 31