4 Depreciation, amortisation and impairment

4 Depreciation, amortisation and impairment
CHF million	2008	2009
Depreciation of property, plant and equipment	186	272
Amortisation of energy purchase rights	52	163
Amortisation and impairment of other intangible assets	42	46
Total	280	481

In 2009, there were no indications of impairment. In the previous year, an impairment loss of CHF 3 million was recognised in connection with the recoverability of assets associated with power generation projects.

Information about impairment testing of goodwill and intangible assets is disclosed in note10.