5t t 82 ] 
fiohtetft plated canal. It will bfe supplied with water by the rivers 
Vv hose valleys it ascends and their tributaries. The results of the 
tileasurcments which were taken in this view in the middle of Septem- 
ber, 1824 are as follows: 
The Little Connemaugh below Bear Rock Run, two miles below 
Selby's mill, yielded, . . „ 14.43 ft. per sec. 
The Little Connemaugh at Selby's mill, - 7.09 
Do. at the mouth of South fork, - - 47.21 
Do. above Johnstown, . „ - 1 1(3.73 
Stoney creek above Johnstown, - - 239.25 
Reservoirs might also be found in the valley above Selby's millj* 
and the headwaters of South fork and Mountain Run led to that spot 
by feeders. 
At this point of the Little Connemaugh the line of canal is stopped 
by the Alleghany mountain, wliich it must cross by a tunnel, to join 
the water courses which fall to the east. The Beaver dam. a brancli. 
of the Juniatta. offers the best route. This branch is joined by Bur- 
goon's Creek and Blair's Runj whose springs are constant, and whose 
waters miglit be led by feeders to the point where the tunnel opens on 
the eastern side of the Alleghany mountain; the waters which on both 
side of that chain might be led to that tunnel and supply the summit 
level of this canal, can give altogether by actual measurements, 40 
cubic feet in a second. 
The eastern section of the canal should descend the Beaver Dam, 
and then follow successively the Frankstown branch of the Juniatta, 
and the Juniatta itself, to its mouth in the Susquehannah, above Peters- 
burg; from thence it should descend along the Susquehannah to Mid- 
dletown, to direct itself afterwards, through the most favorable 
ground, either to the Schuylkill above Philadelphia^ or to Philadelphia 
itself. 
The Beaver Dam joins the Frankstown branch at Frankstowni 
Its valley, from Blair's Run, is open and bordered by a large flat bot- 
tom. From Frankstown to Williamsburg, the valley offers no serious 
obstacle; the route then traverses Lock Mountain at Canoe Gap From 
Williamsburg to Alexandria, the right shore of the river is rugged, 
but the left easy. The river breaks through Tussey's Mountain. At 
this Gap its banks are alternately flat and rugged; the flats of one 
side lying opposite to the bluffs of the other. Its flood seldom rises 
above seven or eight feet. 
From Alexandria to Millerstown, the valley still offers no serious 
obstacle to a canal. Its banks consist of a Succession of flats and 
bluffs, whose slope is. in general, so gentle towards the river, as to 
oppose no difficulties in the way of the works. In this space the Juni- 
atta receives the Raystown branch below Huntingdon and Standing 
Stone Creek, which, at all seasons, affords an ample supply of water* 
From Blair's Run to Millerstown, the left shore of this valley is, in 
general, most favorable; but lower down, and to its confluence in the 
SiisK/uehannah, this shore of the Juniatta offers several perpendicular 
ft 
