Comparing these two charges over an extended time period can provide insights into whether a company is overstating or understating profits. Ongoing spending requirements differ across assets. For example, fellow electricity distributors Spark Infrastructure (ASX: SKI) and DUET Group (ASX: DUE) also have to invest relatively heavily to maintain their networks. On the other hand, pipelines often require lower ongoing maintenance and this can be seen in the accounts of pipeline owner and maintenance provider APA Group (ASX: APA) and natural gas distributor Envestra (ASX: ENV).
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