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Above-ground lines cost around $10 per 1-foot (0.30 m) and underground lines cost in the range of $20 to $40 per 1-foot (0.30 m). [10] In highly urbanized areas, the cost of underground transmission can be 10–14 times as expensive as overhead. [11] However, these calculations may neglect the cost of power interruptions.
The levelized cost of electricity (LCOE) is a metric that attempts to compare the costs of different methods of electricity generation consistently. Though LCOE is often presented as the minimum constant price at which electricity must be sold to break even over the lifetime of the project, such a cost analysis requires assumptions about the value of various non-financial costs (environmental ...
Electric power can be transmitted by underground power cables. Underground cables take up no right-of-way, have lower visibility, and are less affected by weather. However, cables must be insulated. Cable and excavation costs are much higher than overhead construction. Faults in buried transmission lines take longer to locate and repair.
According to the report, the underground electric construction equipment market was valued at $4.5 billion in 2023, and is estimated to reach $16.3 billion by 2032, growing at a CAGR of 15.3% from 2024 to 2032.
The initial project involved two 1,000 MW lines, the first one to New York, and the second going all the way to Connecticut, via the Long Island Sound. The construction cost for the two lines and converter stations in the U.S. was estimated at $3.8 billion. [16] The line to Connecticut was cancelled in July 2010. [17]
The system cost $300,000 to build with installation of the 100,000 feet (30,000 m) of underground conduits one of the most expensive parts of the project. Operating expenses exceeded income in the first two years and fire destroyed the plant in 1890. [ 21 ]
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