We are committed to delivering reliable service to our customers and properly planning for anticipated growth throughout the state. To do so, we continue to invest in our energy grid. As Miami’s urban core continues to grow, Florida Power & Light Company and City of Miami have partnered to install a new underground transmission line that will help meet residents’ energy demands and improve reliability for years to come.
Quick Facts
- Boosting reliability: We are constructing a new (138kV) underground transmission line to enhance the reliability of our service while also planning for future growth in the City of Miami and the surrounding areas.
- Customer benefits: The project will provide improved service reliability and a stronger, more resilient energy grid for our customers in Miami.
- Coverage: It will serve nearly 50,000 customers in Downtown Miami and surrounding areas.
- Community engagement: We're dedicated to keeping the community informed throughout the process and will provide additional information as the project progresses.
- Safety and compliance: We pledge to work safely, respectfully and abide by applicable environmental and governmental regulations.
- Landscaping: Once the project is complete, we pledge to restore all involved areas to their previous conditions.
- Timeline: We plan to bring the new transmission line into service this winter.
Project Timeline
September 2021 – December 2023: Infrastructure Installation
January – December 2024: Cable Installation, splicing and testing
Winter 2024: In-service*
What To Expect
- Infrastructure installation: To place the transmission lines underground, we used directional boring technology – a low-impact underground drilling method. This phase also involved trenching for the installation of manholes.
- Cable installation: Electrical cable is pulled into underground pipes. Then, we connect different sections of the cable underground for continuous flow of electricity – before connecting the cables to the nearby substation.
- Cable testing: All cables are tested to ensure they are ready to carry electricity.
- In-service: Once construction is complete and the underground transmission line is energized, it will start to enhance service reliability for the City of Miami residents.
U.S. 1 at Miami Science Museum in Miami with simulated transmission line (80' height & 300' spans).
The above photo simulation provides an illustration of overhead transmission facilities based on current engineering practices (i.e. typical pole height and span length is superimposed).
U.S. 1 at Miami Science Museum in Miami as it exists today and will remain in the future with this project.
However, through our partnership with the City of Miami, we will be placing the new transmission power lines underground – eliminating the need for FPL’s standard overhead concrete poles and leaving the area visually similar to its current state.
*Timeline subject to change.