First Creek Tributaries
Upstream of I-70
Master Drainageway Plan

First Creek, an east bank tributary to the South Platte River, originates upstream of Interstate 70 and E470 and generally flows to the northwest. The area upstream of I-70 has been studied several times, but the tributaries to First Creek have not been studied in detail. This study focuses on the tributaries to First Creek upstream of I-70 that have tributary drainage basins greater than 130 acres. The study area encompasses approximately 8.1 square miles and is located within the City of Aurora and unincorporated Arapahoe County. The study is also located within the limits of the Urban Drainage and Flood Control District boundary. The watershed is currently mostly agricultural or open space with some multi- family residential development. Development is anticipated to increase in this area. The change from mostly undeveloped to more urbanized will have a significant effect on the drainage systems within the study area.