DRAINAGE OF BLACK AND BOGGY SWAMPS, S. C. 11 



dredge ditch is 4.54 cubic yards per linear foot of channel, and for a 

 handmade ditch it is approximately 1 cubic yard per foot. 



BERMS. 



In order not to put undue weight on the ditch banks and to keep 

 the Avaste material from refilling the ditches, a clear berm, of 8 feet 

 between the edge of the ditch and the toe of the spoil bank should 

 be left on each side of all the dredged channels, and similar berms 

 3 feet wide should be left along the handmade ditches. 



RIGHT OF WAY. 



It is necessary that a right of way be cleared through the swamps 

 for all the ditches and that it be purchased and owned by the drain- 

 age district. The width of the right of way should be determined 

 according to the bottom width of the ditch, since the depth of cut 

 does not vary greatly, as follows: For 3-foot ditch, 30-foot right of 

 way; for 14-foot ditch, 80-foot right of way; for 16 to 20 foot ditch, 

 90-foot right of way; for 22-foot ditch, 100-foot right of way; and for 

 28 to 30 foot ditch, 120-foot right of way. The improvements 

 recommended in this report will require a total of 1,043 acres right 

 of way. 



It is suggested that, an effort be made to secure easements for the 

 right of way instead of purchasing it, as has been done by some 

 drainage districts. Such easements give the district complete con- 

 trol of the land so long as it is used for drainage works; otherwise the 

 land reverts to the owner. 



BRIDGES. 



The State law requires that the drainage district construct all 

 public highway bridges that are made necessary by the construc- 

 tion of a ditch. Steel bridges with concrete abutments are recom- 

 mended, although costing more than wooden structures, because 

 the cost of maintenance will be much less. In making the estimate 

 of cost, bridges have been included for all public road crossings. It 

 is assumed that in most cases 30-foot bridges will be suitable for 

 ditches with 14-foot bases, and 15-foot bridges for ditches with 

 3-foot bases. 



IMPROVEMENTS IN BOGGY SWAMP WATERSHED. 



Boggy Swamp is the longest stream in the district, and drams the 

 largest area. The swamp along the upper 2^ miles of this stream is 

 not over 100 feet wide; then it increases to about one-half mile wide, 

 continuing so to the Orangeburg Road. From there to the Morrison 

 Road it narrows to as little as 50 feet in places, having occasional 

 arms or branching bays. Between Morrison Road and Haskell 

 Baroney Swamp the width varies from 200 to 1,500 feet, averaging 



