delivered the opinion of the Court.
The Superior Court of Pennsylvania affirmed (as modified) an order of the Public Service Commission of that State prescribing a tariff of tolls to be charged on the bridge of the Clark’s Ferry Bridge Company over the .Susquehanna River,
In its review of the facts the Superior Court states that the bridge is comparatively new, having been completed in May, 1925. The bridge replaced and was con *232 structéd near the site of а wooden bridge which had been acquired by the incorporators of the present Company. In August, 1925, a complaint was filed with the-<-Public Service Commission alleging that the rates in effect were unreasonable. By its' order of June 8, 1926, the Commission found the fair' value of - appellant’s property to be $767,800 and that appellant was entitled to receive a gross annual revenue of $85,905, on the basis of а return of 7 per cent, on that fair value, after allowing operating expenses, taxes, an annual depreciation allowance, and amortization of bond discount; An appeal from the Commission’s order-was taken to the Superior Court, but was withdrawn, and in February, 1927, the Company filed a new tariff: The rates thus fixed were continued in effect until July, 1929, when the Company made a voluntary reduction. In Januаry, 1930, the Commission began the present proceeding, on its own motion and, after hearings, determined that the fair value of the appellants’ property, as of February 2, 1932, was still $767,800, and that the annual gross revenue which should be allowed was $84,124 on the basis of a return of 7 per cent, on that fair value, after allowing expenses and annual depreciation. 11 Pa. P.S.C. 222. 1 In this calculation, an item of $1,331 for annuаl bond amortization was omitted. The Superior Court held that it should be included and modified the Commission’s order accordingly, that is, so as to provide that the allowable gross revenue should be $85,455.
*233
.
First.
Appellant contends that the Commission and the Court treated the valuation in the Commission’s decision of 1926 as
res judicata
in the present proceeding. We do not so construe the Commission’s report or the Court’s opinion. Thе Commission received evidence as to alleged changes in value and estimates of the cost of reproducing the property. The Commission determined that “ cost conditions” had not “changed materially” since 1926, and “ upon a complete examination of the entire record in both proceedings ” the Commission found that the fair value of the property was $767,800 as of February, 1932. 11 Pa.P.S.C. аt p. 231. The Superior Court, in construing the action of the Commission, said: “When the subsequent complaints were filed, the Commission evidently did not .consider its previous findings as barring appellant from raising the question of the fair value of its property in 1930 and the proper allowances to be made for operating expenses and depreciation, but instituted an investigation, and, as already stated, admitted in еvidence appellant’s reproduction cost estimate and its supporting testimony, and put in'evidence the reproduction cost esti-r
*234
mate of one of its engineering staff, and the report of the result of an examination of appellant’s books and records.” The Court acted upon what it stated to be
“
the legislative mandate of the amendment of June 12, 1931, P.L. 530, that in an appeal of- this character, we shall consider the record and ‘ on [our] own independent judgment . . . determine whether or not the findings made and the valuation and rates fixed by the Commission are reasonable and proper.’ ” . It'was in this view that the Court examined the “ main controversies ” between the parties.
Appellant attacks the finding of fair value, upon the grounds that-it was based solely on the original cоst of the bridge property and that the amount paid by the appellant for the bridge was less than its fair value at that time and less than its fair value in 1930. It is not open to question that the reasonable cost of the bridge is good evidence of its value at the time of construction. And we have said that
“
such actual cost will continue fairly well to measure the amount to be attributed to. the physical elements of the property so long as there is no change in the level of applicable prices.”
McCardle
v.
Indianapolis Water Co.,
*236 The question is whether the proof shows that the value was greater in 1932. Appellant relies upon the estimate of engineers as to the cost of reproduction new of the physical property, as of September 1, 1929, together with “ all additional exрenditures required over and above the bare cost of the physical property, to put the bridge in operation as an income-producing property.” This estimate gave a total cost of reproduction new less depreciation (the estimate being exclusive of two other elements of alleged intangible value described as “ attached business value ” and “ locatiоn value ”) of $875,644.30. The Commission’s engineer made a similar estimate based upon prices prevailing during the last three months of 1930, which gave the cost of reproduction new, less depreciation, as $741,871. There were also charts showing the price trends for labor and materials for 1924 to 1930, inclusive. As summarized by the Court, the evidence shows “ that in 1924, when the contract for the construction of the bridge was awardеd, construction prices were reported as being 215% of the 1913 level; that in September, 1929, when appellant’s reproduction-cost estimate was made, they were 208% of the 1913 leyel; and that during the last three months of 1930 they ffell to about 198%.” It. would serve no useful purpose to review the details of the estimates of reproduction cost. The Court carefully considered them and properly cоncluded that the trend in prices from 192A-5, when the bridge was built, to 1931-2, when the Commission determined its present fair value, was “ downward rather than upward,” and that “in the absence of proof that the prices paid for the construction of the bridge were abnormally low there is no reason why in the short period of six years after its completion,"with a tendency of prices for both material and labor being downwаrd, there should be a radical increase in the- fair value of the bridge for. rate-making.purposes.” We agree with this conclusion.
*237 It does not appear that the Court made any deduction from the amount of the fair value as determined in 1926 by reason of the depreciation, accrued during the succeeding years. There was controversy as to the extent- of that depreciation. Appellant’s engineers allowed for the four and one-half years which had elapsed to the time of their survey the sum of $16,282. The Commission’s engineer-estimated the accrued depreciation for six years at $41,-403. The Court thought that the latter figure was “nearer the actual accrued depreciation than the estimate of the Company,” but the Court apparently treated such accrued dеpreciation as largely off-set by the “ extra allowance, over the contractor’s bid, for concrete and coffer-dams.” The Court decided that no harm was done the appellant' by leaving the fair value at $767,800.
A distinct question is raised by a claim for what is called “ the special value of location,” in addition to the value of the bridge property thus far considered.. This “ special value ” was put at $100,000. It was based, according to appellant’s engineers, upon the advantage that the location of the bridge has over any other point for miles in either direction because the river is narrower and the conditions of the river bed are more favorable. The engineers made their estimate upon what they thought one would be willing to pay for the present site, in preference to other sites in the vicinity, because of .the additional cost of building a bridge elsewhere. It appears that the'bridge is located in a rural area. It was originally constructed as a part off an extensive transportation system built by the Commonwealth in the first half of the last century. As the Court pointed out, the right to operate a toll bridge across the river at this point or elsewhere “ is fundamentally the gift of the Commonwealth, contained in appellant’s franchise, and to attach1 a value
*238
to it would be to capitalize the franchise contrary to the provisions of the statute and the frequent decisions of the courts.” In building its new bridge, appellant took advantage of the traffic customs which had already been established. ’ In the determination of the value of its property appellant was entitled to be allowed the fair market value of its real estate for all its available uses and purposes, which would include any element of value that it might have by reason of special adaptation to particular uses. But it was not entitled to an increase over this fair market value by virtue of the public use.
Minnesota Rate
Cases,
We conclude that appellant has failed to show confiscation because of the amount used as a rate base.
Second.' Appellant -complains that the amount prescribed for gross revenue is inadequate. Appellant contests the annual allowance for depreciation and the rate at which the fair return- is calculated.
The Commission fixed the annual depreciation allow-. anee at $7,678 and the Court approved it. This amount equals one per cent: of the fair value. Appellant contends that the..allowance should be 2% per cent, of the value of the depreciable property on the straight line basis. The difference — on appellant’s calculation of the fair value— amounts to $13,434. The Court approved the ruling of the Commission.
There is no question as to the fact of depreciation. It-was established, as respоndent admits, that concrete
*239
bridges deteriorate from the moment of their completion; that there are chemical changes in their structure, absorptions of moisture and oxidation, both within the concrete and in the reenforcing iron covered by it, which cannot be stopped in their process or their effects removed. With this understanding, the question is as to the amount which should annually be allowed which will serve adequately to protect the investment from impairment, due to age and use. Testimony was given by one of appellant’s engineers that the average life of a concrete bridge was from 30 to 50 years; by another, that the period for which this bridge might be expected to remain useful was “ from 40 to 80 years,” — he “ would not figure on over 40.” Another testified that physically the bridge “ might have a life of 50 to 100 years.” The Commission’s engineer estimated'its life at from 40 to 50 years; for his computation he took an expectancy of 45 years. Respondent urges that the annual allowance asked by appellant was plainly too large and contrasts it with appellant’s claim for accrued depreciation; that is, as the Court stated, appellant’s engineers “ allow an accrued depreciation for the four and a half years elapsing to the time of their survey of $16,282, but claim a
yearly
depreciation allowance thereafter of $21,210.” While it is recognized that accrued depreciation, as it may be observed and estimated at a given time, and an appropriate allowance of depreciation according to good accounting practice, need not be the same, there is no rule which requires an allowance to be made of continued which in the light of experience is shown to be extravagant.'
Smith
v.
Illinois Bell Telephone Co.,
•The question of tlie ■ amount which should be allowed annually for depreciation is a question of fact.
Georgia Railway & Power Co.
v.
Railroad
Commission,
Appellant also insists that it is entitled to a rate of return of nine per cent, upon the fair value of its property. The Commission and the court decided that seven per cent, was sufficient. Wе perceive no constitutional ground for complaint on that score.
Wabash Valley Electric Co.
v.
Young,
Third. The final attack is on the form of the Commission’s order. The Commission fixed the amount of the annual gross revenue and then prescribed a tentative schedule of rates. 2 . Appellant says that it is obvious that no one can tell in advance how many vehicles of different tariff classifications will pass over the bridge in a year and what annual gross revenue will be produced by a given schedule of rates. But, as the prescribed rates are expressly stated to be tentative, there is no' ground for assuming that the Commission will reject an application to make such changes in the schedule as experience may show to be necessary in order to produce the stipulated revenue. There is nothing in the order whiсh requires that the test period should be a year or any definite time. From the statements at the bar it appears that appellant has not. put the tentative schedule in effect and has made •no application to the Commission for a change in the schedule. If the allowance of gross revenue is adequate, as it has been found to be, there is no basis for complaint *242 because of a schedule of rates which on application may be appropriately modified.
The judgment of the Superior Court of Pennsylvania is
Affirmed.
Notes
The order of the Public Service Commission, of February 2, 1932, is as follows:
“ That Clark’s Ferry Bridge Company file, post and publish, effective thirty (30)' days from date hereof, upon not less than one (1) day’s notice to the public and this Commission, a new tariff calculated to produce an annual gross revenue of not more than $84,125.
"It is further ordered: That said tariff contain as tentative rates intended to produce said gross annual revenue of $84,125, and effective *233 until further action by this Commission or the Company in conformity with said determination of allowable gross revenue the following charges:
“(1) A rate of 8 cents' cash toll for all ordinary, passenger automobiles and wagons now paying 10 cents. .
“(2) A ticket without time limit salable at the rate of two for 15 cents for all such automobiles and wagons.
“(3) A 20-trip ticket non-transferable as between vehicles good any time within thirty (30) days from date of issue and salable for one dollar ($1) for all such automobiles and wagons. ■ ■
“(4) Rates for all other types of vehicles as are now provided in tariff P. S. C. Pa. No. 5. '
“ tt is further ordered: That said Company file with this' Commission pjonthly statements of income and operating expenses, showing the number of 1 vehicles passing over its bridge in each class of traffic as contained in its tariff.”
See Note 1.
