Cheyenne Road Drainage Design, City of Dallas
IEA provided drainage design solutions for a 1-mile section upgrade of Cheyenne Road from an unimproved asphalt road with open ditches to a curb and gutter standard City Collector Roadway.
IEA coordinated frequently with the City and other design consultants to address localized flooding concerns from residential runoff. IEA created the drainage area maps from GIS data and contours provided by NCTCOG through City of Dallas, as-builts and satellite drawings, and extensive field observations. IEA field verified the drainage sub-basins for accuracy. IEA brought solutions for connecting to an undersized drainage system. This is a common need when providing upgrades all the way to the eventual outfall are not feasible due to complications and/or costs.
IEA worked with the City to develop innovative design alternatives, such as in-line detention, upgrades to the downstream system, and offsite flood routing, to meet current City criteria. Another complication is the inadequate downstream system which crosses City limits into the City of Balch Springs. In Phase 1, IEA determined and conceptually developed feasible and recommended alternatives. The City is currently considering these options and recommendations while coordinating with the neighboring City.