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I I I I I I I I I I I I I I I I I I I and multi-family residences and small commercial areas. Some of this area is in the process of development. Runoff from the di rect flow area. whi ch combines with the runoff from the Academy Park flow split also flows in a northeasterly direction towards Bear Creek. The upper end of the basin has an elevation of approximately 5535-feet and the elevation of the lower end at Bear Creek is approximately 5344-feet. The length of the drainageway is 1.05 miles with a slope of approximately 182-feet per mile (3.4%) . The area south of Hampden Avenue ~X~ding to Wadsworth Boulevard is the Academy Park business/commercial complex. When fully developed. the area will consist of several large office buildings and several smaller commercial establishments. This area will be characterized as having large paved parking areas and small areas of perimeter landscaping around the buildings. Approximately 70% of this area is currently fully developed. Between Wadsworth Boulevard and Carr Street. the drainageway passes through unimproved open space and the Regional Transportation District (RTD) AVOCA Park-n-Ride facility. This facility. located immediately adjacent to the drai nageway channel, is just east of Wadsworth Boulevard. Near future development is expected within this reach. Soil Conservation Service (SCS) soil maps for the study area show two predominant types of natural soils. They are the Denver-Kutch clay loam. which falls within the MYdrological Soil group C and the Nunn-Urban land complex. which is a combination of group C and group 0 soils. All soils in the study area are baSically clayey materials derived from weathering and mudstone and shale. C. land Use West of Carr Street to the FHAD limit at Henry's lake, the reach is categorized by the improved open space, comprised almost entirely of the Foothills Golf Course owned by the Foothills Metropolitan Recreation and Parks District. The drainageway through the direct flow basin is characterized by the large lot residential and small areas of commercial development. Currently. several single family residences are being constructed in the lower portion of the reach. Between this area and Hampden Avenue, the drainageway passes through three small ponds and areas of unimproved open space. The reach south of Hampden Avenue is partially developed with a church and a single office building. This area is referred to as the Linpro Office Park. The majority of this reach is presently unimproved open space. The MYdrologic land Use Map. Figure II-3. was defined using the existing planning and zoning maps for the City of lakewood and Jefferson County. The area along the golf course is essentially at the fully developed stage. All other areas will continue to develop increasing the present imperviousness of the basin from 25% to 40% with full development. The land use summary is presented in Table II-I. For each sub-basin. the total area in acres and the percentage of the sub-basin area within each land use category are listed for the existing and future development conditions. The percent imperviousness for each land use is listed at the top of the table. with the re- sulting sub-basin imperviousness listed in the far right column. B. Topographic and Geological Features The Henry's lake Basin drains generally in a northeasterly direction. The high point of the study area just west of Kipling Street has an elevation of 5620-feet and the lower end at Bear Creek is at elevation 5350-feet. The total length of the basin is approximately 3.67 miles with slope of 73-feet per mile (1.4%). -3-