After reviewing comments from the public information meeting that took place in December 2018, the County has decided to move forward with an inside/outside widening concept.
Click here to learn more about the 2018 public meeting.
A second public information meeting took place on January 29, 2020. At this meeting, Charleston County's Public Works Transportation Division presented the widening design for Glenn McConnell Parkway. Below you will find the proposed improvements.
Glenn McConnell Parkway is located directly adjacent to the Church Creek drainage basin, which has known flooding issues. The above exhibit illustrates the existing drainage patterns along Glenn McConnell Parkway with respect to the Church Creek drainage basin.
This drainage exhibit demonstrates that most of Glenn McConnell Parkway drains via stormwater pipes and open ditches to Long Branch, which currently has no connection to the Church Creek basin. A portion of Glenn McConnell Parkway, from Bees Ferry Road to just east of the existing bridges at the CSX railway, drains to the Church Creek basin.
The design includes the installation of control structures in the roadside ditches. The roadside ditches will hold stormwater, slowly releasing the water into the Church Creek and Long Branch drainage basins. These structures will ensure that the widening project does not have a negative effect on the existing drainage. The drainage system will meet the City of Charleston’s stormwater design standards for special protection areas with known flooding issues.
The City of Charleston is currently evaluating the possibility of providing an emergency relief connection from Lake Dotterer to Long Branch. This is a separate project from the Glenn McConnell Parkway widening, but the County is collaborating with the City as their evaluation continues.
Charleston County conducted a noise study to determine the current noise levels along Glenn McConnell Parkway and the potential noise impacts caused by the widening project. Additionally, the project team evaluated the effect noise walls could have along the Providence Commons neighborhood and the Colony at Heron Reserve apartment complex. The preliminary results of this evaluation indicate that these areas do not meet the feasible or reasonable criteria necessary to build a noise wall. The SCDOT’s Traffic Noise Abatement Policy outlines these criteria.
The County will publish the noise study on the project website after finalizing the report. You can find SCDOT’s Traffic Noise Abatement Policy here.
The comment period for this meeting closed February, 29 2020.