In order to construct the Coming Street access/retrieval shaft, the King Street ramp from I-26 eastbound will be closed for the duration of the project, estimated to be July 2019. View a map showing alternate routes (PDF).
Shaft construction is almost complete and excavation of the President Street tunnel continues
Complete work at Lockwood St Shaft Site: January 2019
Substantial Completion: Spring 2020
Final Completion: Summer 2020
Phase 3 of the U.S.17 Spring/Fishburne Drainage Improvement Project will include the construction of deep tunnels and working shafts. There will be 4 working shafts constructed as part of this phase. Two of the shafts will be 20-feet internal diameter (Coming Street/King Street off-ramp and President Street and Cannon Street). The wetwell shaft between the Ashley River Bridges and the Harmon Field working shaft will be 30-feet internal diameter. The tunnel connecting the Coming Street shaft and wet well shaft (under the Crosstown) will be approximately 5,400 linear feet (LF) in length and up to 12-feet in internal diameter.
The tunnel connecting the Cannon St/President St and the Harmon Field shafts will be approximately 2,100 LF in length and a minimum of 8-feet in internal diameter. These tunnels will intersect approximately 140 feet below grade at the intersection of the Crosstown and President Street. There will also be a smaller 500 LF 8-foot diameter tunnel connecting the Cherry Street drop shaft to the Crosstown tunnel.