I 
Art. VIII.] Davis, Drainage Modification, 169 
In the three miles represented on the map there are seven 
rock cuts. Five for the railroad and two for the creek. The 
course of the creek through the gorge has been so changed by 
the railroad company that at present it runs in a much different 
course from that which it formerly occupied. The abandoned 
portions of the old channel still remain and are partially filled 
with water, supplied by surface waters and springs. 
At the point A, at the beginning of the gorge the railroad 
makes a narrow cut through the rock and then parallels the 
creek for a short distance. At B, the rock wall projects out 
from the south side of the gorge and through this the railroad 
makes another rock cut. A new course for the creek has also 
been made through the rock at this point. The abandoned por- 
tion of the channel at B, has a width of 300 feet with a rock 
wall rising quite precipitously to an elevation of 200 feet on 
the north side. On the opposite side of the gorge at this point 
the ascent is more gradual but to an equal height. At C a cut 
similar to that for the railroad at B is made through the rock, 
projecting from the north side of the gorge. But this rock pro- 
jection the creek flows in its natural course, but is soon forced 
to leave this and pass parallel to the railroad through a cut in 
the rock at D. 
To the north of D the old channel is 250 feet in width and 
partially filled with water. At D, the same fact is noticeable 
as at B, that on the opposite side from the rock projecting into 
the gorge the wall rises much steeper than on the same side of 
the projection. 
At E the creek flows in its old channel. On the south 
side of the gorge at this point the rock wall rises 250 feet in 
height at a very steep angle. The railroad again cuts through 
the rock at E. The creek continues to run for some distance 
from E in its natural course but is turned from the course be- 
fore reaching F by the road bed of the railroad and flows around 
the rock projecting from the north side of the gorge. 
The old channel between E and F has a width of 500 feet. 
Throughout the entire gorge Jonathan creek runs on rock bed, 
the walls rising to an elevation of over 200 feet on each side at 
