20 
BULLETIN 114, U. S. DEPARTMENT OF AGRICULTURE. 
Table 4. — Summary of cost data — Continued. 
BLACK SWAMP WATERSHED. 
Ditch. 
Excavation. 
Cubic 
yards, at 
*S cents. 
Cubic 
yards, at 
10 cents. 
Cubic j 
yards, at j 
25 cents. 
Cost. 
Bridges. 
Right of 
way, at 
§10 per 
acre. 
Engi- 
neering 
and legal, 
at 10 
per cent. 
Total. 
Black Swamp 
Wolf Bay 
Causeys Branch. . . 
Titi Branch 
Long Branch 
Lyas Bay 
Ballifore"Braneh . . 
Rose Hill Branch . 
Laterals (18) 
231,170 
86, 120 
5,280 
18,425 
16,275 
17,900 
9,900 
7,000 
7,800 
86, 175 
320, S94 
9,932 
4,606 
4,069 
4,475 
2,475 
1, 750 
1,900 
21,544 
S2,500 
2,900 
1,000 
500 
1,500 
1,000 
500 
500 
5,000 
§1,070 
390 
130 
110 
120 
70 
50 
50 
590 
52,446 
1,322 
574 
468 
610 
355 
230 
245 
2,713 
§26, 910 
14,544 
6,310 
5,147 
6,705 
3,900 
2,530 
2,695 
29, 847 
Total for Black 
Swamp water- 
shed 
1,645 15.400 
I 
3,588 
INDEPENDENT WATERSHEDS. 
Church Branch 
! 92,620 
§9,262 
13, 519 
12,311 
2,925 
12, 562 
§4,000 
1,600 
1,600 
1,000 
1,000 
1380 
530 
480 
90 
350 
§1,364 
1,565 
1, 439 
402 
1,391 
§15,006 
Hog Branch 
121,990 
5,280 
5,280 
11,700 
50,250 
17,214 
King Branch 
109,910 
15, 830 
Scott Swamp No. 1 
Laterals (10) 
4,417 
15,303 
Total for inde- 
pendent water- 
50,579 
9,200 
1,890 
6,161 
67, 770 
Total for the drainage district, $371,598. 
Number of acres in district, 67.642. 
Average cost per acre, §5.50. 
The total cost of the 66 lateral ditches has been estimated above 
as $114,232. Omitting these, the cost of ditching only the two main 
swamps and the principal tributaries would be, as estimated, $257,366, 
or $3.80 per acre. It is strongly recommended, however, that the 
laterals be constructed, as well as the main ditches. 
MAINTENANCE. 
Not much work should be required to keep the ditches in condition 
after they are constructed. The velocity of now due to large fall in 
most of the ditches will assist materially in keeping down the growth 
of vegetation in the channels. However, an organized method of 
inspection should be adopted in the district whereby each ditch will 
be examined at least once each year, preferably just before the rainy 
season. Any obstructions should be removed and any damage to the 
ditches should be repaired as soon as noted. If maintenance work is 
given prompt attention, the defects can be remedied with compara- 
tively little expense; but if it is neglected, the task will become a 
formidable one, and in the meantime the efficiency of the drainage 
svstem will be reduced. 
