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OverWatts AtlasCountriesOwnersInsightsWireChangesSources Live map
Asset classes
- Transmission Line80,968
- Power Plant32,429
- Substation / Converter7,614
- Oil & Gas Field7,055
- Coal / Uranium Mine5,382
- Pipeline4,951
- Cement Plant3,513
- Data Centre3,283
- Iron & Steel Plant1,293
- LNG Terminal1,198
- Grid Storage965
- Iron Ore Mine949
- Chemical Plant868
- Interconnector704
- Export Terminal519
- Refinery279
- Storage / Tank Farm38
- Oil / Commodity Contract19
- Hydrogen Project18
- Carbon Capture (CCS)16
Chokepoints
Asset class
Transmission Line
OverWatts maps 94,099 transmission lines across 0 countries.
The largest owner-operators worldwide are RTE (9,024), 50Hertz Transmission (1,205) and EVN (1,166). Half of the world's transmission lines in service predate 2010 (median commissioning year of the 34 with a known date), 10 came online in the past decade and the oldest still listed is Pacific DC Intertie, dating from 1970. 1 more is under construction or proposed, the biggest being Champlain Hudson Power Express.
94,099
Transmission Line
0
Countries
1
In construction / proposed
Biggest owners & operators worldwide
- RTE9,024 10%
- 50Hertz Transmission1,205 1%
- EVN1,166 1%
- TenneT TSO1,149 1%
- Red Eléctrica de España1,048 1%
- Amprion999 1%
- Statnett864 0.9%
- TenneT586 0.6%
Counts an asset once per company named as its owner or operator; a joint venture counts for each partner.
When they were built
- 1970s3
- 1980s5
- 1990s5
- 2000s4
- 2010s13
- 2020s4
Median commissioning year 2010 · 34 of 94,099 carry a start date
Largest under construction & proposed
- Champlain Hudson Power Expressconstruction
Frequently asked
- How many transmission lines are there in the world?
- OverWatts maps 94,099 transmission lines across 0 countries, from open datasets.
- Who owns the most transmission lines?
- RTE is named as owner or operator on 9,024 of them, ahead of 50Hertz Transmission (1,205), EVN (1,166) and TenneT TSO (1,149).