Property, Plant and Equipment |
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment at December 31 consisted of the following (dollars in thousands):
| | | | | | | | | | | | Utilities Group | 2015 | 2014 | Lives (in years) | Electric Utilities | Property, Plant and Equipment | Weighted Average Useful Life (in years) | Property, Plant and Equipment | Weighted Average Useful Life (in years) | Minimum | Maximum | | | | | | | | Electric plant: | | | | | | | Production | $ | 1,136,847 |
| 43 | $ | 1,125,845 |
| 45 | 25 | 65 | Electric transmission | 301,280 |
| 52 | 284,032 |
| 49 | 40 | 70 | Electric distribution | 785,351 |
| 48 | 718,342 |
| 44 | 15 | 75 | Plant acquisition adjustment (a) | 4,870 |
| 32 | 4,870 |
| 32 | 32 | 32 | General | 180,840 |
| 24 | 152,982 |
| 21 | 3 | 65 | Capital lease - plant in service (b) | 261,441 |
| 20 | 261,441 |
| 20 | 20 | 20 | Total electric plant in service | 2,670,629 |
| | 2,547,512 |
| | | | Construction work in progress | 98,918 |
| | 49,700 |
| | | | Total electric plant | 2,769,547 |
| | 2,597,212 |
| | | | Less accumulated depreciation and amortization | 540,634 |
| | 484,406 |
| | | | Electric plant net of accumulated depreciation and amortization | $ | 2,228,913 |
| | $ | 2,112,806 |
| | | |
_____________ | | (a) | The plant acquisition adjustment is included in rate base and is being recovered with 15 years remaining. |
| | (b) | Capital lease - plant in service represents the assets accounted for as a capital lease under the PPA between Colorado Electric and Black Hills Colorado IPP. The capital lease ends in conjunction with the expiration of the PPA on December 31, 2031. |
| | | | | | | | | | | | | 2015 | 2014 | Lives (in years) | Gas Utilities | Property, Plant and Equipment | Weighted Average Useful Life (in years) | Property, Plant and Equipment | Weighted Average Useful Life (in years) | Minimum | Maximum | | | | | | | | Gas plant: | | | | | | | Production | $ | 13 |
| 30 | $ | 13 |
| 37 | 30 | 30 | Gas transmission | 24,081 |
| 62 | 24,090 |
| 54 | 53 | 70 | Gas distribution | 607,224 |
| 44 | 557,405 |
| 46 | 41 | 56 | General | 100,765 |
| 21 | 90,085 |
| 19 | 16 | 22 | Total gas plant in service | 732,083 |
| | 671,593 |
| | | | Construction work in progress | 9,437 |
| | 16,072 |
| | | | Total gas plant | 741,520 |
| | 687,665 |
| | | | Less accumulated depreciation and amortization | 106,778 |
| | 92,035 |
| | | | Gas plant net of accumulated depreciation and amortization | $ | 634,742 |
| | $ | 595,630 |
| | | |
| | | | | | | | | | | | | | | | | | | | 2015 | | | | | | Lives (in years) | Non-regulated Energy | Property, Plant and Equipment | Construction Work in Progress | Total Property Plant and Equipment | Less Accumulated Depreciation, Depletion and Amortization | Net Property, Plant and Equipment | Weighted Average Useful Life | Minimum | Maximum | | | | | | | | | | Power Generation | $ | 156,721 |
| $ | 2,182 |
| $ | 158,903 |
| $ | 51,471 |
| $ | 107,432 |
| 33 | 2 | 40 | Coal Mining | 154,630 |
| 3,649 |
| 158,279 |
| 97,663 |
| 60,616 |
| 13 | 2 | 59 | Oil and Gas | 1,132,776 |
| — |
| 1,132,776 |
| 925,908 |
| 206,868 |
| 24 | 3 | 25 | | $ | 1,444,127 |
| $ | 5,831 |
| $ | 1,449,958 |
| $ | 1,075,042 |
| $ | 374,916 |
| | | |
| | | | | | | | | | | | | | | | | | | | 2014 | | | | | | Lives (in years) | Non-regulated Energy | Property, Plant and Equipment | Construction Work in Progress | Total Property Plant and Equipment | Less Accumulated Depreciation, Depletion and Amortization | Net Property, Plant and Equipment | Weighted Average Useful Life | Minimum | Maximum | | | | | | | | | | Power Generation | $ | 153,779 |
| $ | 2,262 |
| $ | 156,041 |
| $ | 47,704 |
| $ | 108,337 |
| 33 | 2 | 40 | Coal Mining | 145,619 |
| 3,748 |
| 149,367 |
| 90,629 |
| 58,738 |
| 15 | 2 | 59 | Oil and Gas | 962,395 |
| — |
| 962,395 |
| 646,640 |
| 315,755 |
| 24 | 3 | 25 | | $ | 1,261,793 |
| $ | 6,010 |
| $ | 1,267,803 |
| $ | 784,973 |
| $ | 482,830 |
| | | |
| | | | | | | | | | | | | | | | | | | | 2015 | | | | | | Lives (in years) | | Property, Plant and Equipment | Construction Work in Progress | Total Property Plant and Equipment | Less Accumulated Depreciation, Depletion and Amortization (a) | Net Property, Plant and Equipment | Weighted Average Useful Life | Minimum | Maximum | Corporate | $ | 376 |
| $ | 15,377 |
| $ | 15,753 |
| $ | (4,770 | ) | $ | 20,523 |
| 10 | 5 | 30 |
___________ | | (a) | Accumulated depreciation, depletion and amortization at Corporate reflects the elimination of the capital lease accumulated depreciation difference between Colorado Electric and Black Hills Colorado IPP. |
| | | | | | | | | | | | | | | | | | | | 2014 | | | | | | Lives (in years) | | Property, Plant and Equipment | Construction Work in Progress | Total Property Plant and Equipment | Less Accumulated Depreciation, Depletion and Amortization (a) | Net Property, Plant and Equipment | Weighted Average Useful Life | Minimum | Maximum | Corporate | $ | 5,524 |
| $ | 5,196 |
| $ | 10,720 |
| $ | (3,485 | ) | $ | 14,205 |
| 11 | 5 | 30 |
___________ | | (a) | Accumulated depreciation, depletion and amortization at Corporate reflects the elimination of the capital lease accumulated depreciation difference between Colorado Electric and Black Hills Colorado IPP. |
|