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9 Property, plant and equipment

9 Property, plant and equipment
    Power plants Grids Assets under construction Property and buildings Other tangible assets Total
  CHF thousands            
               
  Gross values at 1 January 2010 759,540 799,092 96,602 105,290 56,442 1,816,966
  Own costs capitalised 72 5,462 7,632 - - 13,166
  Additions 612 12,215 50,921 6,688 2,265 72,701
  Additions from change in consolidation 60,326 - - 2,846 78 63,250
  Disposals   -23,672 -2,330 -7,950 -8,395 -42,347
  Disposals from change in consolidation - - -5,907 - -1,840 -7,747
  Reclassification 2,934 14,299 -28,656 14,893 -3,470 -
  Translation differences -64,994 - -2,894 -7,632 -2,941 -78,461
  Gross values at 31 December 2010 758,490 807,396 115,368 114,135 42,139 1,837,528
               
  Accumulated depreciation and impairments at 1 January 2010 -280,791 -377,569 -21,794 -36,068 -28,978 -745,200
  Depreciation -23,263 -19,276 - -1,912 -5,812 -50,263
  Impairments -1,660 - -74 - - -1,734
  Disposals - 22,658 - 4,968 8,291 35,917
  Disposals from change in consolidation - - 2,207 - 1,340 3,547
  Reclassification -5 -7,396 - - 7,401 -
  Translation differences 9,383 - 583 442 887 11,295
  Accumulated depreciation at 31 December 2010 -296,336 -381,583 -19,078 -32,570 -16,871 -746,438
  Net values at 31 December 2010 462,154 425,813 96,290 81,565 25,268 1,091,090
  Of which pledged as collateral for debts           4,050
               
  Gross values at 1 January 2011 758,490 807,396 115,368 114,135 42,139 1,837,528
  Own costs capitalised 2,069 3,103 8,465 4 436 14,077
  Additions 19,098 9,011 44,581 1,680 11,403 85,773
  Additions from change in consolidation - - - - - -
  Disposals -4,479 -5,726 -7,865 -2,064 -3,961 -24,095
  Disposals from change in consolidation - - - - - -
  Reclassification 60,427 5,815 -69,375 137 2,996 -
  IFRS 5 reclassifications - -86,189 - - - -86,189
  Translation differences -9,955 - -638 -1,156 -503 -12,252
  Gross values at 31 December 2011 825,650 733,410 90,536 112,736 52,510 1,814,842
               
  Accumulated depreciation and impairments at 1 January 2011 -296,336 -381,583 -19,078 -32,570 -16,871 -746,438
  Depreciation -24,627 -18,610 - -2,010 -3,887 -49,134
  Impairments - - -9,350 - - -9,350
  Disposals 1,215 4,990 7,642 575 1,109 15,531
  Disposals from change in consolidation - - - - - -
  Reclassification -989 - - -199 1,188 -
  IFRS 5 reclassifications   13,577 - - - 13,577
  Translation differences 1,788 - 74 85 170 2,117
  Accumulated depreciation at 31 December 2011 -318,949 -381,626 -20,712 -34,119 -18,291 -773,697
  Net values at 31 December 2011 506,701 351,784 69,824 78,617 34,219 1,041,145
  Of which pledged as collateral for debts           4,050

The pledged fixed assets were put up as collateral for the investment loans and mortgages as listed in Notes 18 and 23. Insured value of property, plant and equipment: MCHF 1,380 (previous year: MCHF 1,380). In the year under review, TCHF 1,231 in interest on borrowings (previous year: TCHF 1,465) was capitalised for assets under construction. A financing cost rate of 3.14per cent (previous year: 3.36%) was used.Impairment of property, plant and equipment

There were two main impairments on assets under construction in 2011. These relate to an impairment for a trading system of around MCHF 7.2. In addition, a value adjustment was carried out for recognised costs relating to a power plant project in the amount of MCHF 1.7. Impairments totalling MCHF 1.7 were necessary in 2010. These mainly related to a wind power plant.