The structures are all relatively simple and a fair indication of their cost can be obtained by comparison with pre-war cost of more or less similar structures. To these figures must, however, from 50 to 100% to cover uncertainties as to labor and material costs under war conditions and during the post-war period. In this way the following figures have been obtained.
First Stage (Present Project)
Reconstruction of Canadice Dam and Outlet conduit and construction of new Hemlock Lake Dam and main supply conduit .............................. $1,500,000 to $2,500,000
Second Stage
Calabogue Conesus diversion .................. $1,000,000 to $1,500,000
Third Stage
Cohocton diversion ........................... $1,500,000 to $2,000,000 Total ................................ $4,000,000 to $6,000,000
The figures given above include a low-level outlet conduit at Canadice Lake. Pumping to supply the restored portion of Conduit No. 1 would no longer be necessary after the completion of the first stage of the project. The entire supply would then be delivered by gravity, as at present.
These figures do not include the cost of lands and water rights nor the cost of repair or replacement of Conduit No. 2.
The structural cost for gravity supply water systems under pre-war conditions, for cities comparable in size with Rochester, is commonly $250,000 to $350,000 per million gallons of dependable supply. The proposed project will increase the dependable supply to Rochester by roundly 20 mgd and the estimated cost per million gallons comes within these limits even after allowing for greatly increased costs to be expected under conditions now and in the near future.