SANITAKY SUEVEY OF DRAINAGE BASIN OF POTOMAC RIVEK. 235 
nects Rock Creek basin at the foot of the canal with the Potomac at that 
point. The canal season is about eight months long. Its ser^hce 
is discontinued in the winter months after di’aining off the water. 
RAILROADS. 
Several important railroad lines are found in the Potomac basin. 
From east to west there are the Western Maryland and the Baltimore 
and Ohio raihoads. Following the windings of the North Branch 
down as far as Piedmont, W. Va., is the Western Maryland. At 
Piedmont it is joined b}'^ the Baltimore and Oliio. These two lines 
of raihoad then run side by side as far as Cumberland, where they 
part, the Western Maryland skirting the north bank as far as Wil- 
liamsport, Md., where it leaves the river, while the Baltimore and 
Ohio Railroad follows the south bank to Harpers Ferry, where it 
crosses to the Mar^dand side, which it closel}^ follows as far down as 
Point of Rocks. From north to south the basin is traversed by the 
Cumberland Valiev and the Norfolk and Western railroads, the 
former crossing the Potomac at MTlliamsport, Md., and the latter at 
Shepherdstown, W. Va. 
Table No. 4 — Population in Potomac drainage basin. 
PLACES ABOVE 4,000 POPULATION. 
Town. 
Distance 
above 
Great 
Falls, in 
miles, a 
Popula- 
tion 
(census of 
1900). 
Town. 
Distance 
above 
Great 
Falls, in 
miles, a 
Popula- 
tion 
(census of 
1900). 
Frederick, Md 
Hagerstovm, Md 
47 
76 
86 
87 
121 
127 
176 
9,296 
13,591 
7, 564 
5, 396 
5, 161 
8, 864 
17, 128 
Piedmont, Westernport, 
Luke & 
207 
223 
224 
4,623 
7,289 
5,274 
Martinsburg, W. Va 
Staunton, Va 
Wajmesboro, Pa 
j .Frostburg, Md 
Winchester, Va 
Chamber sburg, Pa 
Cumberland, Md 
Total 
84, 186 
PLACES 1,000 TO 4,000 POPULATION. 
Leesburg, Va 
19 
1,513 
Mount Savage, Md 
186 
2,000 
Brunswick, Md 
39 
2,471 
H^rndman, Pa 
190 
1,242 
Shepherdstown, W. Va 
56 
1,184 
Keyser, W. Va 
202 
2,536 
Charles Town, W. Va 
57 
2,392 
Harrisonburg, Va 
211 
3,521 
Sharpsburg, Md 
60 
1,030 
Barton, Md 
213 
a 1,287 
Westminster, Md 
63 
3,199 
Lonaeoning, Md 
216 
2, 181 
Littlestown, Pa 
78 
1,118 
Midland, Md 
219 
a 1,800 
Williamsport, Md 
82 
1,472 
Ocean, Md 
220 
a 1,500 
Gettysburg, Pa 
83 
3, 495 
Front Royal, Va 
97 
1,009 
! Total 
1 
41, 445 
Greencastle, Pa 
104 
1, 463 
Remaining population 
Woodstock, Va 
127 
1,069 
(rural) 
374, 567 
Luray, Va 
139 
1,147 
; Towns over 4,000 
84, 186 
Shenandoah, Va 
165 
1,220 
^ Total population . . 
500, 198 
Eckhart Mines, Md 
186 
a 1, 600 
a From U. S. Geological Survey. & These three towns are practically one place. 
Population per square mile, 44. 
