Tsiouvaras Simmons Holderness is responsible for the design of the Asbury Outfall for the City and County of Denver and Wastewater Capital Projects Management. This project starts at S. Broadway from Wesley Avenue to Evans Avenue and then heads west where it ultimately outfalls to the South Platte River. The originally proposed alignment from a preliminary study was changed in order to allow an existing 60-inch RCP crossing the railroad/RTD property to remain in place and utilize the capacity of that pipe. The UDSWM analysis was updated to reflect the reroute of the runoff and check the flowrates generated in the preliminary study. The proposed outfall includes a 60” run of storm sewer that has to be bored under the railroad, light rail, and S. Santa Fe Drive (CDOT ROW). Site discussions, research, and engaging a tunneling specialist were completed to determine the best method to accomplish the boring. Numerous large utilities are present along the alignment for the Asbury Outfall, these utilities were avoided, sometimes through the use of special manhole structures to compensate for needs outside of the typical design. Significant research went into determining the locations of the utilities, constructing the bore, shoring to stabilize existing buildings and bridges and phasing of the project were completed in order to understand all challenges the project presents and to obtain more competitive bids from contractors.

STATUS:  To be Completed in 2013