AGL Energy Limited Annual Report 2011 87 Freehold land and  Leasehold  Plant and buildings improvements equipment Total $m $m $m $m Note 20 – Property, plant and equipment Year ended 30 June 2011 Balance at 1 July 2010, net of accumulated depreciation and impairment  24.7 18.1 2,013.4 2,056.2 Additions  0.1 0.1 469.5 469.7 Acquisitions through business combinations (Note 42)  – – 8.4 8.4 Transferred from oil and gas assets (Note 19)  – – 14.5 14.5 Transferred from intangible assets (Note 21)  – – 6.4 6.4 Disposals  – – (3.6) (3.6) Derecognised on disposal of subsidiaries (Note 43)  – – (165.9) (165.9) Depreciation expense  (0.2) (2.2) (101.8) (104.2) Balance at 30 June 2011, net of accumulated depreciation and impairment  24.6 16.0 2,240.9 2,281.5 Balance at 1 July 2010 Cost (gross carrying amount)  26.2 27.6 2,539.8 2,593.6 Accumulated depreciation and impairment  (1.5) (9.5) (526.4) (537.4) Net carrying amount  24.7 18.1 2,013.4 2,056.2 Balance at 30 June 2011 Cost (gross carrying amount)  26.3 27.7 2,861.1 2,915.1 Accumulated depreciation and impairment  (1.7) (11.7) (620.2) (633.6) Net carrying amount  24.6 16.0 2,240.9 2,281.5 Year ended 30 June 2010 Balance at 1 July 2009, net of accumulated depreciation and impairment  16.8  19.2  2,073.1  2,109.1 Additions  6.9 1.0 278.1 286.0 Acquisitions through business combinations (Note 42)  –  –  0.4  0.4 Transferred from exploration and evaluation assets (Note 18)  1.2  –  –  1.2 Disposals  – – (2.8) (2.8) Derecognised on disposal of subsidiaries (Note 43)  –  –  (236.7)  (236.7) Depreciation expense  (0.2)  (2.1)  (90.3)  (92.6) Impairment loss  – – (8.4) (8.4) Balance at 30 June 2010, net of accumulated depreciation and impairment  24.7  18.1  2,013.4  2,056.2 Balance at 1 July 2009 Cost (gross carrying amount)  18.1  26.6  2,513.0  2,557.7 Accumulated depreciation and impairment  (1.3)  (7.4)  (439.9)  (448.6) Net carrying amount  16.8  19.2  2,073.1  2,109.1 Balance at 30 June 2010 Cost (gross carrying amount)  26.2  27.6  2,539.8  2,593.6 Accumulated depreciation and impairment  (1.5)  (9.5)  (526.4)  (537.4) Net carrying amount  24.7  18.1  2,013.4  2,056.2