FLOOD08354 - Laserfiche WebLink

Home Browse Search

I I I I I I I I I I I I I I I I I I I Major Sub-Basin 6: Land ownerships in this basin consist of private, City of Lafayette and public (Centaur High School). A small drainage ditch has been provided by residential developments, which convey stormwaters south, through the basin, to Coal Creek. The upper reach of the ditch (serving residential areas north of South Boulder Road), is tributary to a detention pond at South Boulder Road and Atlantis Circle. The detention is drained by 36-inch pipe under South Boulder Road, to the lower reaches of the drainage ditch serving Centaur Village, and ultimately to Coal Creek. Present land uses in the basin are light commercial, residential, school and business development. TABLE 2 Maj or Sub-basin Characteristics Basin Basin Area Length Slope Future % Basin No, (acres) (ft) (ft) (ftjft) Imperviousness 1 325 10,700 6,860 ,015 37 2 905 18,100 12,740 .015 32 3 320 12, 100 6,850 ,015 35 4 470 8,100 4,845 .009 45 5 510 11,100 9,650 ,014 37 6 135 7,900 2,670 .015 46 7 355 8,300 3,240 .016 40 Major Sub-Basin 7: The land ownerships in this basin consist of private, City of Lafayette, City of Louisville, and Boulder County. Presently no drainage conveyances exist in the basin except for a small ditch I'kiich lies directly v.est of the Centaur Village development and serves a new residential development lying between Centaur Village and Colorado Highway 42, This drainage ditch terminates at Coal Creek. Present land uses consist of residential and light commercial areas. The hydrologic characteristics for each major basin are summarized below in Table 2. It should be noted that the basin boundaries, and therefore acreages, have been developed during the formulation of the selected alternative plan, and do not reflect the total area of the Lafayette basin. 10 11