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XII-l SECTION XII UESCRIPTION OF ALTERNATIVES Reach 4 - Bates to Colfax. the Colfax Avenue viaduct. Denver. The reach is urban to the river. The river is This 6.3 mile reach extends from Bates Avenue to This reach is entirely within the City of with extensive development immediately adjacent confined throughout this reach. REACHES The 40-mile study reach of the South Platte River from Chatfield to Brighton was divided into 8 reaches for planning purposes. The reaches were chosen on the basis of existing recreation plans, known flood problems, existing or planned flood control projects, similar floodplain development and with regard to jurisdictional boundaries. Reach 5 - Colfax to Cherry Creek. This 1.1 mile reach extends from the Col- fax Avenue viaduct to Cherry Creek just downstream of Speer Boulevard. The reach is entirely within the City of Denver and it includes the relatively undeveloped central Platte area which contains numerous railroad yards and industrial facilities. Confluence Park at the confluence of Cherry Creek with the South Platte River is at the downstream end of this reach. Description of Reaches Reach 1 - Chatfield to Columbine Valley. This 4-mile reach extends from the outflow of Chatfield Oam to what is known as the Columbine Valley Oam which is at approximately Coal Mine Road. This reach includes Arapahoe County, Jefferson County, Douglas County, the City of Littleton and the Littleton Floodplain Park. The reach is rural in nature with numerous gravel mines on the west bank and scattered development and the Littleton Floodplain ParK on the right bank. Reach 6 - Cherry Creek to Franklin. This 3.6 mile reach extends from the confluence of Cherry Creek with the South Platte to the Franklin Street Bridge and is entirely within the City of Denver. The reach goes through the industrial heart of the city and the river is lined on both sides by manufacturing facilities, meat packing plants, and railroad yards. The river has been channelized through most of this reach, however, it has taken on a somewhat natural appearance as a result of the growth of vegetation and lack of maintenance in the many years since the channelization was com- pleted. There are numerous highway and railroad bridges in this reach. Reach 2 - Columbine Valley to Oxford. This 3.3 mile reach is from the Columbine Valley Dam to the Oxford Avenue Bridge. It includes the Town of Columbine Valley, the City of Littleton, the City of Englewood, the City of Sheridan and Arapahoe County. This reach is best classified as suburban since development exists on both sides of the river, and landfills have filled some of the floodplain land, but the river bed is undisturbed. This reach will be part of the U.S. Army Corps of Engineers channel improvement project. Reach 7 - Franklin to Sand Creek. This 2-mile reach extends from the Frank- lin Street Bridge to the confluence of Sand Creek with the South Platte River in Commerce City. The reach includes Adams County and Commerce City. This reach is primarily rural and there is sparse development along the banks of the river. Reach 3 - Oxford to Bates. This 1.7 mile reach extends from the Oxford Avenue Bridge to Bates Avenue. This reach includes the cities of Sheridan and Englewood. This reach, like Reach 2, can be described as suburban since the river channel is relatively undisturbed but there is extensive development on both banks of the river. A major tributary of the South Platte, Bear Creek, flows into the South Platte within this reach. Reach 8 - Sand Creek to Brighton. This 18.1 mile reach extends from the Franklin Street Bridge to Baseline Road in Brighton - the termination point of this study. It includes Adams County, Commerce City, Thornton, and Brighton. Floodplain activities include gravel mining and agriculture. There are inactive gravel mining lakes, some of which have been breached by