DRAINAGE OF BLACK AND BOGGY SWAMPS, S. C. 19 
Table 3. — Length and excavation for lateral ditches — Continued. 
Lateral 
No. 
Tributary to— 
Length and 
excavation. 
Lateral 
No. 
Tributary to- 
Length and 
excavation. 
31 
The Savannas 
Ft.andcu.yds. 
7,200 
4,700 
5,150 
15,200 
8,800 
3,900 
7,000 
5,400 
3,900 
7,200 
5,200 
4,900 
7,200 
4,900 
8,300 
7,050 
2,900 
2,900 
8,000 
3,000 
51 
52 
53 
54 
55 
56 
57 
58 
£9 
60 
61 
62 
63 
64 
65 
66 
67 
Black Swamp 
Ft.andcu.yds. 
2,800 
32 
Independent 
3,900 
33 
...do 
do 
8,000 
34 
.do... 
Titi Branch 
2,500 
4,200 
3,200 
35 
36 
Manigault Branch 
Beaver Dam No. 1 
Wolf Bay 
37 
Manigault Branch 
4,000 
3,000 
8,300 
5,850 
38 
Hog Branch 
39 
Lateral No. 30 
40 
Titi Branch 
Manigault Branch 
Lateral No. 37 
41 
3,000 
3,900 
2,750 
6,000 
42 
do 
do 
Lateral No. 38 
43 
44 
do 
Boggy Swamp 
45 
Lateral No. 64 
1,300 
46 
do 
Mill Branch 
2,300 
47 
Black Swamp ^ 
2, 950 
48 
49 
Total 
Church Branch 
359, 475 
50 
ESTIMATE OF COST. 
Owing to the arrangement of the swamps and branches in Black 
and Boggy Swamps drainage district the excavation will necessarily 
be slow, as the dredges will have to be rebuilt several times. The 
cost of excavation by dredge in the two main swamps has been esti- 
mated at 8 cents per cubic yard and in the tributaries at 10 cents 
per cubic yard. These figures are based on contracts in different 
localities, where conditions are similar to those in this district. The 
handwork has been estimated at 25 cents per cubic yard. The cost 
of clearing the right of way is included in the unit price for excava- 
tion; the purchase cost has been estimated at $10 per acre. Bridges 
have been estimated at $20 per foot of span, plus $200. A summa- 
rized estimate of the costs for the whole district is given in the fol- 
lowing table: 
Table 4. — Summary of cost data. 
BOGGY SWAMP WATERSHED. 
Excavation. 
Bridges. 
Right of 
way, at 
$10 per 
acre. 
Engi- 
neering 
and legal, 
at 10 
per cent. 
Ditch. 
Cubic 
yards, at 
'8 cents. 
Cubic 
yards, at 
10 cents. 
Cubic 
yards, at 
25 cents. 
Cost. 
Total. 
Boggy Swamp 
369,540 
9,440 
7,550 
5,280 
$31, 923 
15, 939 
10, 464 
15, 050 
10, 092 
9,057 
14, 425 
1,050 
55, 7C2 
$4,900 
1,600 
800 
800 
1,600 
$1,430 
620 
410 
610 
390 
370 
570 
80 
1,540 
$3,825 
1,816 
1,167 
1,646 
1,208 
943 
1,660 
113 
6,280 
$42,078 
Beaver Dam No. 1 
140, 510 
91,440 
150, 500 
84, 170 
90, 570 
130, 750 
19,975 
Beaver Dam No. 2 
12,841 
Manigault Branch 
18, 106 
Mill Branch 
6,700 
13, 290 
10, 370 
Rum Branch 
5. 400 
1,600 
18, 255 
Hurricane Branch 
(Cleaning 
' and straightening-. ~) 
1,243 
Laterals (38) 
223,050 
5,500 
69, 082 
Total for Boggy 
Swamp water- 
163, 762 
16,800 
6,020 
18,658 
205,2*0 
