'37 [32 1 
by till owing a dam atross the latter, above its mouth. Height of its 
dam 50 feet, length of its feeder 14 miles. 
Area, - 3.444,444 sq. yds. 
Prism, .-..--- 6,536,666 cub. ydq. 
No. 5 might be formed iti the great Youghiogeny, between Snowy 
creek and the little Youghiogeuy, by throwing a dam across it above 
the mouth of the little Yotjghiogeny. Height of the dam 67 feet, 
length of the feeder lOi miles. 
Area, - - -\ - - - 2,833,332 sq. yds. 
Prism, - - . - - - 5,555,555 cub. yds. 
No. 6 might be formed in the little Youghiogeny by throwing a 
dam across its mouth. Height of the dam 67 feet, and length of tlic 
feeder 1 1 miles. 
Area, -" 53,375 sq. yds. 
Prism, - " 106,750 cub. yds. 
No. 7 might be formed in Bunker's lick, by throwing a dam 
across it, above its moutli. Height of the dam 75 feet, and length of 
the feeder 9 miles. 
Area, - - ~ - - - 1,055,555 sq. yds. 
Prism, 1,851,851 cub. yds. 
' No. 8 might be formed in the great Youghiogeny, between the 
moirth of the little Yougliiogeny, and the ledge, by throwing a dam 
across the ledge. Height of this dam 94 1 feet, length of the feeder, 
6| miles. 
Area, - - - - - - 2,770,666 sq. yds. 
Prism, - - - - - . 5,303,555 cub^ yds. 
Areas of all the reservoirs, - •• - 16,279, 149 sq. yds. 
Prisms do. - - - , - 30,844,413 cub. yds. 
If we dispense with the two last reservoirs, whose dams are the 
highest and most expensive, tije five remaining reservoirs above the 
mouth of the little Yougliiogeny will contain — Area exposed to eva- 
poration. 12,452,928 square yards, or 4^^^ square miles, or 2,572y^o°^ 
acres. Prism of their waters, 6 feet above the base mark, besides 6 
inches allowed per mile of the length of the feeder of each reservoir 
for its descent. These are all available to supply the summit level 
23,689,007 cubic yards. 
These reservoirs are all independentof one another, and the higher 
ones may pour the surplus of their waters into the lower ones. 
Those numbered 3 and 5, in the great Youghiogeny, may be regarded 
as one, to which all the others can contribute when circumstances re- 
quire it. The dam No. 3 might even besuppnssed, which would re- 
duce the number of dams to 5. But the proper h)cation of these dams, 
as also their number and dimensions, will ieceive further investiga- 
tion, wJiich belong to the final project; their number will likely be 
reduced- 
As to the total quantity of water which these basins might hold, if 
we suppose their main depth 16 >ards, and a middly horizontal sec- 
tion run between the surface and bottom, equal in area to one half of 
