18 
BULLETIN 114, U. S. DEPARTMENT OE AGRICULTURE. 
King Branch watershed consists of flat woods in the upper portion, 
and rolling land in the lower portion, which has fair natural drainage 
and is mostly under cultivation. The swamp along King Branch, 
like others in this part of the district, is narrow at the upper end and 
gradually widens toward the outlet. The fall is 40 feet in 5.6 miles, 
being greater at the lower end than at the upper. A rninirnum. dredge 
ditch is recommended below the Orangeburg Road, and a handmade 
ditch extending north for about 1 mile into the flat woods to give 
those lands a drainage outlet. The ditch would have a total length 
of 29,490 feet. Two 30-foot bridges will be required. 
Scott Swamp No. 1 drains rolling land principally, and most of the 
lower end of the area is cultivated. At the upper end the swamp is 
wide and flat, but it narrows rapidly toward the outlet. The fall is 
39 feet in 2.4 miles. The proposed improvement is a handmade ditch 
12,700 feet long. An existing small ditch about a mile long in the 
upper part of the swamp will reduce the necessary excavation by 
about 1,000 cubic yards. Two 15-foot bridges will be needed. 
LATERAL DITCHES. 
In addition to the ditches that have been described, practically all 
of which lie in the larger watercourses, 66 laterals should be con- 
structed as indicated and numbered on the map (fig. 2) . These will 
extend out from the main channels at all the low places, to provide 
drainage connection between the flat lands and the larger ditches. 
Owing to the lack of machinery suitable for constructing small 
ditches in wooded land, the laterals have been estimated as hand- 
made ditches, 3 feet in bottom width, 5 feet deep, with J to 1 side 
slopes. The excavation has been computed as 1 cubic yard per linear 
foot of ditch. Where these laterals are crossed by public roads 23 
bridges will be required, each 15 feet long. The following table shows 
the length and excavation for the lateral ditches : 
Table 3. — Length and excavation for lateral ditches. 
[Exeavation=l cubic yard per linear foot of ditch.] 
Lateral 
No. 
Tributary to— 
Length and 
excavation. 
Lateral 
No. 
Tributary to — 
Length and 
excavation. 
1 
B oggv Swamp 
Ft.andcu.vds. 
3,600 
5,900 
12,200 
3,100 
4,800 
12,300 
2,900 
6.900 
6,875 
4,100 
5,300 
8,400 
4,500 
5,300 
16 
17 
18 
19 
20 
21 
22 
23 
24 
25 
26 
27 
28 
29 
30 
Boggy Swamp 
Ft. and cu. yds. 
4,100 
2 
..do 
do 
2,S0O 
3 
Beaver Dam No. 1 
do .............. 
. do 
do 
4.400 
4 
5 
Beaver Dam No. 2 
Rum Branch 
9,600 
3,300 
6 
do ........ 
do 
4,700 
do 
5,100 
8 
f Eliminated. I 
Lateral No. 22 
2,100 
9 ! Tienvpr Dam fao. 1 
.. .do 
2,200 
10 
Wolf Bay 
Lateral No. 26 
3,600 
11 
11, 650 
12 
do ... 
.do 
7,800 
13 
7,700 
14 
6.900 
15 
Beaver Dam No. 2 
Mill Branch 
6,600 
