PROJECT

Aiken-Sage Mill Transmission Line & Substation

We are providing engineer-procure-construct (EPC) services for a key transmission project supporting growing customer load in South Carolina, including a new data center in Aiken County. The project for owner Santee Cooper includes building a new substation, expanding an existing substation, adding two 230-kV transmission lines, and rebuilding a 115-kV transmission line.

The new 230-kV substation will be connected to the existing substation Aiken No. 3 with the two 230-kV transmission lines. The 16 miles of 115-kV lines being rebuilt connect Aiken No. 1 and Briggs Road and Aiken No. 1 and Aiken No. 3 substations.

Our team is executing the project in two phases.

Phase 1 focused on determining and detailing scope, cost and schedule, allowing engineering work to proceed while finalizing the project scope and pricing. Long-lead equipment procurement and subcontract negotiations occurred during this phase, enabling swift contract buyouts in Phase 2. The main objective was to establish a solid project scope and prepare engineering packages for pricing materials, equipment and construction contracts.

Phase 2 includes a detailed proposal, including a comprehensive schedule, execution plan, and pricing for materials, construction and close-out activities. The bid selection process for procurement was a collaborative effort between our team and Santee Cooper.

Construction began in August 2024 and is expected to be complete in late 2025.

Client

Santee Cooper

Location

Aiken, South Carolina

Region

Southeast

Services

Electrical Transmission & Distribution

Electrical Transmission

Overhead Transmission

Substations

Industry

Power