| Public Utility Property, Plant, and Equipment |
The following tables summarize utility property, plant and equipment by asset category: | | | | | | | | | Eversource | As of March 31, 2017 | | As of December 31, 2016 | (Millions of Dollars) | | Distribution - Electric | $ | 13,893.9 |
| | $ | 13,716.9 |
| Distribution - Natural Gas | 3,049.3 |
| | 3,010.4 |
| Transmission - Electric | 8,600.1 |
| | 8,517.4 |
| Generation | 1,225.6 |
| | 1,224.2 |
| Electric and Natural Gas Utility | 26,768.9 |
| | 26,468.9 |
| Other (1) | 585.1 |
| | 591.6 |
| Property, Plant and Equipment, Gross | 27,354.0 |
| | 27,060.5 |
| Less: Accumulated Depreciation | | | | Electric and Natural Gas Utility | (6,607.5 | ) | | (6,480.4 | ) | Other | (251.3 | ) | | (242.0 | ) | Total Accumulated Depreciation | (6,858.8 | ) | | (6,722.4 | ) | Property, Plant and Equipment, Net | 20,495.2 |
| | 20,338.1 |
| Construction Work in Progress | 1,146.7 |
| | 1,012.4 |
| Total Property, Plant and Equipment, Net | $ | 21,641.9 |
| | $ | 21,350.5 |
|
(1) These assets are primarily comprised of building improvements, computer software, hardware and equipment at Eversource Service. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As of March 31, 2017 | | As of December 31, 2016 | (Millions of Dollars) | CL&P | | NSTAR Electric | | PSNH | | WMECO | | CL&P | | NSTAR Electric | | PSNH | | WMECO | Distribution | $ | 5,628.7 |
| | $ | 5,471.5 |
| | $ | 1,981.9 |
| | $ | 851.8 |
| | $ | 5,562.9 |
| | $ | 5,402.3 |
| | $ | 1,949.8 |
| | $ | 841.9 |
| Transmission | 3,930.1 |
| | 2,462.8 |
| | 1,075.5 |
| | 1,083.4 |
| | 3,912.9 |
| | 2,435.8 |
| | 1,059.3 |
| | 1,061.1 |
| Generation | — |
| | — |
| | 1,189.6 |
| | 36.0 |
| | — |
| | — |
| | 1,188.2 |
| | 36.0 |
| Property, Plant and Equipment, Gross | 9,558.8 |
| | 7,934.3 |
| | 4,247.0 |
| | 1,971.2 |
| | 9,475.8 |
| | 7,838.1 |
| | 4,197.3 |
| | 1,939.0 |
| Less: Accumulated Depreciation | (2,125.4 | ) | | (2,064.4 | ) | | (1,277.7 | ) | | (347.0 | ) | | (2,082.4 | ) | | (2,025.4 | ) | | (1,254.7 | ) | | (338.8 | ) | Property, Plant and Equipment, Net | 7,433.4 |
| | 5,869.9 |
| | 2,969.3 |
| | 1,624.2 |
| | 7,393.4 |
| | 5,812.7 |
| | 2,942.6 |
| | 1,600.2 |
| Construction Work in Progress | 321.5 |
| | 239.0 |
| | 107.3 |
| | 70.6 |
| | 239.0 |
| | 239.1 |
| | 96.7 |
| | 78.1 |
| Total Property, Plant and Equipment, Net | $ | 7,754.9 |
| | $ | 6,108.9 |
| | $ | 3,076.6 |
| | $ | 1,694.8 |
| | $ | 7,632.4 |
| | $ | 6,051.8 |
| | $ | 3,039.3 |
| | $ | 1,678.3 |
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