South Platte River

800 Jefferson Avenue, Suite B - Louisville, CO 80027 - (303) 673-9795 - (303) 673-9796 fax

 

This project is the single largest flood control project ever undertaken by the Urban Drainage and Flood Control District, and/or the City and County of Denver and represents state-of-the-art water resource engineering. When completed, this project will remove 320 acres of land within north Denver from the 100-year floodplain.

This project has been divided into three (3) separate final design and construction phases. Phase I, which was completed in May 1997, constructed 2,000 linear feet of channel improvements including flood levees, greenway trails, bank stabilization, aquatic and wildlife habitat improvements, landscape plantings, and the removal of a large abandoned sanitary sewer, which bridged the river.

Phase II, completed in August 1998, included construction of additional floodwalls and flood levees, bank stabilization, greenway trails, aquatic and wildlife habitat, and landscape plantings.

The Phase III construction (Fall 2005 thru 2008) included the removal of the Burlington Ditch /O’Brian diversion dam downstream of Franklin Street. These ditch facilities irrigate over 100,000 acres of land and are the facilities that fill Barr Lake. This project includes the construction of a diversion approach channel and box culvert, a new diversion dam with boat landings upstream and downstream for safety purposes and the construction of a fish ladder over the new diversion dam.

Also included are the construction of grade control weirs, the construction of the Franklin Street trail underpass, the construction of a new pedestrian bridge, removal and replacement of the Union Pacific Railroad (UPRR) bridge downstream of Franklin Street, and removal, relocation of a 42-inch live sanitary sewer and reconstruction of the 36-inch Denver Water Department water line. In addition, this project incorporates construction of scour protection for the project at the Franklin Street bridge, aquatic and wildlife habitat improvements, and appurtenant facilities.

404 Permitting, regulatory permitting, and FEMA floodplain submittals have been key parts of this project.