Large Load Customer Growth

Prior to submitting an application, the DLC Business Services team will meet with prospective customers to address any questions regarding the process. Additionally, the maximum information we provide to prospective customers about transmission interconnection potential includes the following details regarding the closest transmission straight-line distance to the customer parcel, circuit voltage and circuit construction type (overhead or underground). 

To apply to the Transmission Interconnection Queue, the applicant must submit the following completed documentation to transmission@duqlight.com:

1. Binding deed, lease, or option to buy
2. Large Load Application requesting information such as the project location, contact information, load type and requirements, voltage, etc.
3. PDFs of electrical single line and site plan stamped by a Pennsylvania licensed professional engineer
4. DLC Transmission Interconnection 10 Year Load Ramp (in-service date => ten years in future) including the normal demand (MW) and anticipated peak demand (MW)
5. DLC Transmission Interconnection Data Center Questionnaire (only required if data center project) identifying the total expected consumption, voltage and cooling center data
6. Executed Transmission Project Load Study Agreement defining the study purpose, timing, cost and terms of the contract
7. Deposit of $250,000

Once all documentation has been submitted, the Transmission Load Study Agreement is executed, and the deposit is received, DLC will review the customer materials. DLC will reply with any clarifying questions, and the customer must respond within 14 days. After all clarifications are resolved, DLC will notify the customer of their position in the queue. Any updates to that position will be communicated via email. 

DLC will notify the customer via email when their project reaches the primary position in the Transmission Interconnection Queue. Upon receiving this notification, the customer will have 14 days to confirm that the application remains accurate and that they are prepared to begin the Transmission Load Study.

DLC will conduct a preliminary Transmission Load Study and provide the completed study to the customer. As necessary, DLC will engage a qualified third‑party engineering firm to support development of a high‑level cost estimate and project schedule.

Once provided the preliminary Transmission Load Study, the customer will have 14 days to confirm they want to move forward with the project. If the customer elects to proceed, DLC will present this project to PJM stakeholders through the PJM supplemental project process. Once presented, PJM will analyze the project as part of a Do No Harm Study administered by PJM. Once DLC receives the results of PJM’s Do No Harm Study, DLC will incorporate any required adjustments into the Transmission Load Study and provide the Transmission Load Study to the customer. The customer will receive:

• Transmission Load Study, including estimated costs for system upgrades
• Project schedule for transmission system upgrades
• Risk register for transmission system upgrades
• Project schedule for connection to the transmission system
• Risk register for connection to the transmission system

Following completion of the Transmission Load Study, DLC, the customer, and the third‑party design firm will participate in a review meeting to discuss study findings, project risks, schedules, and cost estimates.

After this review, the customer will have 30 days to submit the following:

1. Signed copy of the DLC Guaranty Contract – System Upgrades
   • Corresponding Payment for System Upgrades
2. Executed DLC Guaranty Contract – Customer Substation Connection
   • Payment for Phase 1 as defined in the contract     

Failure to provide the required executed agreements and payments within the 30‑day period will result in cancellation of the project. Any unused funds will be returned to the customer, and DLC will advance to the next project in the queue.

DLC will notify you by email. You will have 14 days to update your application documents before the preliminary Transmission Load Study begins.

A review meeting is held among DLC, the customer, and the design firm. Afterward, you have 30 days to sign and fund the required Guaranty Contracts. If the contract is not signed within 30 days, the project will be cancelled. Any unused funds will be refunded, and DLC will move to the next project in the queue.

The $250,000 deposit funds DLC study work and third‑party engineering activities.

Any remaining unused funds are refunded if the project is cancelled.

DLC shares updates primarily via email and schedules review meetings at key milestones.