[ 32 ] 86 
To tliis wc may add a .'oscrvoir higher on the South fork; another 
liij»hcr on the North j^lade, another on iMea^i^.w Mountain Run about 
the enti'ancc to tlie tunni^l, and on the higli glade of Cherrytreei 
these require no extent of feeders, and a moderate extent and eleva- 
tion of (!am. These niay he considered as at least equal to one square 
mile () feet deep, or, I6f,2r0,400, which ;id;ied to the preceding sums, 
is 339,233,155. 
Recollecting that we are providing for a dnvighth nf sixty daySf 
which has never hecn known on tliese mountains, this may be ad- 
mitted as sufiicient — but, in truth* we have assumed large size locksj 
and C(y7/s^a»/ operation of them. But it may ajipea!' iPiexj)cdient that 
they should he so large, and still there are two other sources of sup- 
j)ly, attended witli some rxpoise. These are— First, To bring into tlie 
glade reservoir the watei-s of the upper brandies of tiie Little You- 
ghiogeny, Nest Lick, and V^'olf Runs, (the miniiuufn delivery of whichj 
appears to have been, feet 8,746.) by means of a duct thiough the in- 
tervening hill, the distance tlii-ough, being three mites^ and connected 
with this, might be a feeder to the Cherrytree fork, wliich affords 
11,503, these added 1,728,000, and reach the best situation for re- 
servoirs on all the upper brandies of the Yoiighiogeny. 
To those may be added the Pearl Run and l^ine swamp reservoir, 
which may, (according to Mr. Shriver's Memoir and survey,) be of 
several square miles extent, confintd by a dam of small dimensic^ns. 
Rut this must be attained i»y means of an aqueduct feeder, and the 
use of some extent of iron pijie. This is not difficult, but the ground 
has not been examined with this view; the elevation is, however, 
considerably above the base line, and the line under discussion. But 
wc may leave the resources of the west side of the rival" in reserve 
f )r the western section. 
it remains to elucidate the circumstances of the line with the 
sJwrtcst tunnel, viz: the 9th line. This line passing from Dry Arm to 
Deep creek, it is probable the tunnel may be shortened to one mile — 
passing down the glade to the narrows, it thence will follow, as be* 
fore described, the course to Bear creek valley. The glade was ex- 
amined and found to have a soil of about four feet deep, based on 
rock, probably like that of the adjacent ridges sandstone in strata* 
If excavation were to commence 4 feet decj) at North glade, which 
was found to be 17.794, tlien minus 4. is 13.794. The mouth of 
KIkLick opjMisite Dry Arm 26.194 above base, also, minus4 = 22.194 
less 13.794 = feet 8,'40(>. the depth of digging in rock diminishing 
westward to 0. In forming a canal througli the glade, it will, no 
4louht, be necessary to employ c<uisiderah!e force in pumpingj per- 
haps the cheapest jiower is the steam engine, where fuel is cheap. 
The summit level wotild occupy the place of one of tiie glade reser- 
voirs before descrii)ed. and must be made to have the properties of 
one. The otiicts will he (oiiditionally adequate. 
This line is one miir h)!igtr tlian the. slioitost; but besides that, the 
tuiitul is hut about one mile. Should increase of business on the canal 
I'cndrr it expedient, a second tunnel of tiic same length might be made,, 
