Opinion by
Mr. Justice Brown,By the Act of April 28, 1899, P. L. 74, boroughs and cities are authorized to change the course or channel of a run or natural water way within the municipal limits, and against properties benefited by such change there may be assessed a fair and ratable portion of the damages, costs and expenses resulting therefrom. Under the provisions of this act the course of Grafius Run, a natural stream running through the city of Williamsport, was changed, and proceedings were in*634stituted by the city to compel the owners of properties benefited by the change to pay a part of the costs and expenses alleged to have been incurred in making the change. Properties that had been damaged by the overflow of the run, but which do not abut on the sewer into which its waters are' deflected, were assessed for the resulting benefits. The court below sustained these assessments, but, upon appeal to the Superior Court, this was reversed: Grafius’ Run, 31 Pa. Superior Ct. 638.
It is clear from the report of the viewers that the act of 1899 is not involved in the assessments made by them, and the one against the property of the appellees is, therefore, void. By an ordinance approved August 17, 1900, the city amended its plan of sewerage and drainage by providing for the construction of a main storm sewer eleven feet in diameter, running from the intersection of Locust street and Rural avenue to the Susquehanna river. One of the purposes of this sewer was to dispose of the waters of Grafius Run, but several branch or lateral storm-water sewers draining certain portions of the city were to empty into it. By this ordinance the natural course of Grafius Run was not changed or relocated, and the action of the city in passing it is to be regarded simply as one relating to its general sewerage system, to which the act of April 28, 1899, does not apply. If, by the construction of this large sewer,- properties abutting on the line of it are benefited, they may be assessed under the Act of May 16, 1891, P. L. 71, but not under the act of 1899, relating to the changing alteration or relocation of a natural water course.
On January 23, 1901, nearly six months after the approval of the ordinance authorizing the construction of the large storm sewer, the city passed the ordinance under which the proceedings below were instituted. This later ordinance changed the course of Grafius Run and directed that upon the completion of the sewer to be constructed under the ordinance of August 17, 1900, the waters of the run should be deflected into it, the receptacle of drainage from other smaller sewers to be connected with it.
What the city might have done under the act of 1899 was to change by ordinance the course or channel of the run, and “after the passage and approval” of the same petition the *635court for the appointment of viewers to ascertain the damages, costs and expenses resulting from the change, and to fairly and ratably assess the said damages, costs and expenses, or so much thereof as might be just and reasonable upon the properties benefited by the change. Bat this is not what the city did. It first, in 1900, amended its plan of sewerage and drainage, and in amending the same provided that, among other drainage into the large sewer, there should be that of Grafius Run. Subsequently, in 1901, it changed the course of this run and directed that its waters should be deflected into the large main sewer, extending from the intersection of Locust street and Rural avenue to the Susquehanna river and, along its route, receiving the contents of several smaller sewers having no connection with Grafius Run. It is manifest that the cost, expense and construction of this main sewer did not result from the change of the course of the run, and, if they did not result from such change, their ascertainment was not for viewers appointed under the act oE 1899. The damages, costs and expenses to be ascertained by viewers appointed under that act are those “ resulting from the vacation, change, alteration or relocation of the course or channel ” of any creek, run or natural water way.
The viewers were appointed “ to ascertain the damages, costs, expenses and benefits resulting from the alteration, vacation, change or relocation of the course or channel of Grafius Run, and to fairly and ratably assess the damages, costs and expenses, or so much thereof,” as they might deem just and reasonable upon the properties benefited or affected by the change ; but they made no such report. They report nothing at all as to damages, costs and expenses resulting from the change in the course of the run. Their report is simply, “ That the estimated cost of construction of the main sewer down Locust street, from High street to the river, is about $95,000, of which sum the undersigned viewers have assessed against the properties which, in their judgment, are or will be affected by the proposed improvement, the sum of $25,398.” The “ proposed improvement ” is a sewer benefiting not only those properties which had been damaged by the overflow of the run, but others in other portions of the city, forinto it there will empty the waters of several branch or lateral storm-water *636sewers draining portions of the city in no way connected with or affected by Grafius Run. If the property of the appellees is benefited by the construction of this main sewer, they cannot be called upon to pay any portion of the cost or expense of the construction of the same, even under the act of 1891, for they are not abutting owners : Witman et al. v. City of Reading, 169 Pa. 375; Parker’s Appeal, 169 Pa. 433; Beechwood Avenue Sewer Cases, 179 Pa. 490.
For the reason stated in this opinion the order of the Superior Court reversing the order of the court below in confirming the report of the viewers is affirmed.