Mark Clark Expressway - I-526


Spring 2013

The proposed project has been under careful consideration since the publication of the DEIS and the public hearings. Most recently, by Charleston County action per a resolution dated December 13, 2012, efforts associated with evaluation of the proposed Mark Clark Expressway are moving forward again. Charleston County has specifically approved advancing Alternative G through the Final EIS and Record of Decision, with the following modifications:

  • A grade-separated interchange at Folly Road, including an overpass at Up on the Hill Road on James Island
  • An overpass to maintain the connectivity of East Shore Lane in West Ashley
  • A speed limit of 45 miles per hour

In addition to these design modifications, Charleston County has requested that efforts be made to eliminate traffic signals along the route and provide an overpass at Riley Road on James Island.

Detailed evaluations of traffic impacts, potential environmental impacts, engineering analyses, and the modifications listed above will be evaluated through the development of the Final EIS. It is anticipated that the Final EIS will be complete and a Record of Decision will be made by the Federal Highway Administration in approximately 12 to 18 months.

Public Hearings (Summer 2010)

Public Hearings (Summer 2010)
The South Carolina Department of Transportation (SCDOT), Federal Highway Administration (FHWA), Charleston County, the US Army Corps of Engineers, and South Carolina Department of Health and Environmental Control - Ocean & Coastal Resource Management (SCDHEC-OCRM) held five public hearings for the public to offer input on the Mark Clark Expressway Draft Environmental Impact Statement (DEIS) and the SCDOT Recommended Preferred Alternative.

After officially releasing the Mark Clark Expressway DEIS and the SCDOT Recommended Preferred Alternative on July 28, 2010, some concern was expressed that having two public hearings at one central location could limit the ability to reach all of the people who may want to share their thoughts and comments. “Public input on the alternatives presented has always been important to this planning effort, and we sincerely want to hear from everyone at this important stage prior to the Final EIS and Record of Decision,” said David Kinard, the SCDOT Project Manager. Three additional meetings were scheduled to be held on September 7, 8 and 9 at West Ashley High School, James Island Charter High School, and St. Johns High School, respectively.

Each public hearing followed the same format, with an open house question and answer opportunity starting at 5 pm, and a formal presentation followed with comment period, starting at 6 pm. All comments received at the meetings and during the comment period will be incorporated into the official record. Meetings were held:

Tuesday, August 31, 2010
& Thursday, September 2, 2010

Burke High School
244 President Street
Charleston, SC 29403-4742
CARTA Route 201

Tuesday, September 7, 2010
West Ashley High School
4060 West Wildcat Blvd.
Charleston, SC 29414
CARTA Route 42

Wednesday, September 8, 2010
James Island Charter High School
1000 Ft. Johnson Road
Charleston, SC 29412-8898

Thursday, September 9, 2010
St. John's High School
1518 Main Road
Johns Island, SC 29455-3436
Tri-County Link Route C204

Public Hearing Handout
PH_Handout_Summer2010.pdf (1.3Mb)

Reasonable Alternatives
ReasonableAlts.pdf (30.3Mb)

Reasonable Alternatives Matrix
ReasonableAltsMatrix.pdf (70Kb)

Traffic Analysis
trafficanalysis_board.pdf (30Kb)

Alternatives A and B
AltA_BTraffic.pdf (7.9Mb)

Alternatives C and D
AltC_DTraffic.pdf (6.2Mb)

Alternatives E and F
AltE_FTraffic.pdf (6.6Mb)

Alternative G
AltGTraffic.pdf (17.4Mb)

Regional Mobility
RegionalMobility.pdf (540Kb)

Recommended Preferred Alternative
RPA_board.pdf (42Kb)

Recommended Preferred Alternative – overview
RPA_Overview.pdf (13.6Mb)

Recommended Preferred Alternative – panel 1
RPA_Panel_1.pdf (26.2Mb)

Recommended Preferred Alternative – panel 2
RPA_Panel_2.pdf (29.3Mb)

Recommended Preferred Alternative – panel 3
RPA_Panel_3.pdf (24.7Mb)

Recommended Preferred Alternative – panel 4
RPA_Panel_4.pdf (28.2Mb)

Recommended Preferred Alternative – Johns Island Connector Roads
RPA_Johns_connectors.pdf (10Mb)

Copies of the DEIS are available for public review at the following locations: SCDOT District 6 Office, Berkeley Charleston Dorchester Council of Governments (BCDCOG) Office, Charleston County Department of Transportation Development, and four Charleston County Public library branches including the Main Library, Johns Island, James Island, and West Ashley.

The two-month public comment period on the DEIS and Recommended Preferred Alternative ended on September 30, 2010.

All comments received will be included in the official record and those with addresses will receive a written response from the project team. Input gathered during the public comment period will be incorporated with additional field studies to refine the project’s final design and mitigation measures. The Mark Clark Expressway Final EIS and Record of Decision have an anticipated completion date of spring 2011.

Spring/Summer 2009 Project Updates

Spring/Summer 2009 Project Updates

Summer 2010 Newsletter

Summer 2010 Newsletter
MarkClarkNewsletter_Summer2010.pdf (808Kb)

Pubic Information Meetings (Spring 2009)

Three open-house Public Information Meetings were held in the project area from 6:00 PM to 8:00 PM to update the public about the project status. The meetings were held at West Ashley High School on April 30, 2009, St. Johns High School on April 5, 2009 and at James Island High School on April 7, 2009.

The purpose of the meeting was to:

  • Present the results of the Tier I Alternatives Analysis
  • Present the ‘Reasonable Alternatives’ to be carried into the DEIS
  • Collect comments and input on the ‘Reasonable Alternatives’

The public was encouraged to attend the meetings to provide comments and input into this project.

Agency Involvement
Agency_Involvement.pdf (85Kb)

DEIS Criteria
DEIS_Criteria.pdf (35Kb)

Alternative Analyses Tier 1 Criteria
Evaluation_Criteria_spring09.pdf (62Kb)

Other Alternatives Considered
Other_Alternatives_Considered .pdf (2.8Mb)

Purpose and Need
Purpose_and_Need.pdf (46Kb)

Reasonable Alternative 1 - Map
maps_reasonable_alternative-1.pdf (2.3Mb)

Reasonable Alternative 8 - Map
maps_reasonable_alternative-8.pdf (1.2Mb)

Reasonable Alternative 10 - Map
maps_reasonable_alternative-10.pdf (1.2Mb)

Reasonable Alternative 11 - Map
maps_reasonable_alternative-11.pdf (3.0Mb)

Reasonable Alternative 11a - Map
maps_reasonable_alternative-11a.pdf (1.2Mb)

Reasonable Alternative 36 - Map
maps_reasonable_alternative-36.pdf (1.2Mb)

Tier 1 Criteria
Tier_1_Criteria.pdf (57Kb)

Public Information Meeting Notice (Spring 2009)

Public Information Meeting Notice
Spring09IMnotice.pdf (1.1Mb)

Pubic Information Meetings (November 2008)

Three open-house Public Information Meetings were held in the project area from 5:00 PM to 7:00 PM to update the public about the project status. The meetings were held at Fort Johnson Middle School on November 12, 2008, West Ashley High School on November 18, 2008 and at St. Johns High School on November 20, 2008.

The purpose of the meeting was to present updated project information and to collect input and comments on:

  • Draft of the Project Purpose and Need
  • Range of Alternatives Presented
  • Additional Alternatives that may need to be considered

The public was encouraged to attend the meetings to provide comments and input into this project.

Public Information Meeting Announcement
pim_announcement.pdf (31Kb)

Frequent Comments from Public Scoping Process
frequent_comments.pdf (31Kb)

What is the purpose of the project?
project_purpose.pdf (40Kb)

Purpose and Need: Enhance Regional Mobility - Map
regional_mobility.pdf (3.4Mb)

Purpose and Need: Capacity and Safety - Map
capacity_safety.pdf (3.5Mb)

What alternatives will be considered in the EIS?
alternatives.pdf (277Kb)

Proposed Alternatives: Improve Existing Roads - Map
proposed_alternatives.pdf (3.5Mb)

Existing Alternative Modes of Transportation in the Study Area - Map
alternative_modes.pdf (838Kb)

Proposed Alternatives: New Location - Map
alternatives_new.pdf (3.3Mb)

Alternative Evaluation Criteria
evaluation_criteria.pdf (20Kb)

handout.pdf (925Kb)

Review of Scoping Comments

SCDOT is reviewing the scoping comments to determine the scope of the EIS and the reasonable alternatives.

SCDOT Initiates the Scoping Process to Evaluate the Proposed Mark Clark Expressway Completion

A Public Scoping Meeting and Agency Scoping Meeting were held to initiate the scoping process for the proposed Mark Clark Expressway completion.

The initial coordination/scoping process was initiated in order to obtain comments and input from agencies and the public to help determine the purpose and need for the project, alternatives to be evaluated, and the issues that will be examined as part of the EIS process.

A draft of the Agency Coordination and Public Involvement Plan was distributed for comment.

Public Scoping Meeting Handout
meeting_handout.pdf (1.5Mb)

Agency Coordination and Public Involvement Plan
agency_public_plan.pdf (1.1Mb)

Scoping Meeting Information

A Public Scoping Meeting was held on April 10, 2008 from 6:00 PM to 8:00 PM. This open-house meeting was held at Murray-LaSaine Elementary School located at 691 Riverland Drive on James Island.

The purpose of this meeting was to:

  • Introduce the project to the public
  • Gather initial comments from the public
  • Identify the needs for the project
  • Identify concerns the public may have about the project or its impact to the human and natural environment

The public was encouraged to attend in order to meet the project team and provide input into this important project.

In addition to mailing a postcard invitation to residents within five zip codes located in the study area, notification of the Public Scoping Meeting was published in project area newspapers: The Post and Courier – March 28, 2008, The James Island Journal – April 3, 2008, The Charleston Chronicle - April 2, 2008, and Island Life News Magazine – insert placed in the March/April 2008 edition on April 1, 2008.

Public Scoping Meeting Post Card Information
meeting_notice.pdf (1.9Mb)

Notice of Intent

January 9, 2008

Following the project initiation, a Notice of Intent (NOI) to prepare an Environmental Impact Statement, as required by CEQ regulations 40 CFR 1501.7 was prepared. The NOI was published in the Federal Register on January 9, 2008.

Notice of Intent
noi.pdf (51Kb)

Federal Register
federal_register.pdf (20Kb)

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