Mahlon Pitney, City and County of Denver v. Denver Union Water Company Denver Union Water Company…
“ The reason is not obscure: the cost and detriment to a property owner attributable to the use of his property by the public, and the value of the service rendered by the property to the public, are measured day by day, month by month, year by year, and are little influenced by the question how long the service is to continue. The cost of the service includes the use of the plant, but, ordinarily, not its destruction, except through the slow processes of wear and tear and obsolescence, for which graduated depreciation allowances are made. ”
