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Phase 2 Project Details
US17 Septima Clark Project Details for Phase 2


Updated 3 March 2017 - Construction commenced on 1 June 2015 and is scheduled to be complete summer 2017.  Please click on the two pages to the left to learn more about the 2 Week Look Ahead and Traffic Information for Phase 2 of the project.  The total cost for this phase of the work is $23.5M.


Phase 2 of the US17 Septima Clark Transportation Infrastructure Reinvestment Project will be very similar to the first phase of the project.  The work will be split fairly evenly between additional improvements to the stormwater surface collection and conveyance system and additional transportation improvements.  The work will take place on the following streets:

  • Cannon St. between the western extremity of the previous phase and the Ashley River
  • Spring St. between the western extremity of the previous phase and the Ashley River
  • President St. from Cannon St. to Fishburne St.
  • Fishburne St. from Cannon St. to Ashley Ave.
  • Ashley Ave. from Fishburne St. to Sumter St. 

This phase of the project will also include landscaping and lighting improvements on the Crosstown (Cannon and Spring Streets).  Decorative street lights will be installed along Cannon and Spring Streets similar to the ones installed along the first phase in addition to palm trees and other plants.  The grassed median between Cannon St, Spring St, Lockwood Blvd, and the Wendy's will see extensive landscaping and will be turned into another park complete with walking paths and benches.  Pedestrian improvements will also be constructed along the Crosstown to make the corridor safer for both pedestrians and vehicles. 

Also as part of this phase, eight 140-ft deep drop shafts will be constructed.  The finished diameter of the drop shafts will be either 48-inches or 54-inches, depending on the amount of stormwater each of the systems is designed to accommodate.  Ultimately, the surface collection and conveyance systems will be tied to these drop shafts which will then allow the water to flow into a system of deep tunnels that will be constructed with the next phase of the project. 

The funding will be a 50/50 grant from the the Federal Match Program administered by the SCDOT.  The City of Charleston will be paying for half the project and the SCDOT will be paying for the other half through money from the Federal Highway Administration.