DRAINAGE OF BLACK AND BOGGY SWAMPS, S. C. 

 Table 3. — Length and excavation for lateral ditches — Continued. 



19 



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 

 59 

 60 

 61 

 62 

 63 

 64 

 65 

 66 

 67 



Black Swamp 



Ft.andcu.yds. 

 2,800 



32 







3,900 



33 



...do 



do 



8,000 



34 



.do , 



Titi Branch 



2,500 



35 

 36 



Manigault Branch 



Beaver Dam No. 1 



WolfBay 



4,200 

 3,200 



37 



Manigault Branch 





4,000 



38 





3,000 

 8,300 



39 





Lateral No. 30 



40 



Titi Branch 



Manigault Branch 



Lateral No. 37 



5,850 



41 





3,000 



42 



do 



LateralNo.38 



3,900 



43 



.do 



do 



2,750 



44 







6,000 



45 







1,300 



46 



.do 



Mill Branch 



2,300 



47 







2, 950 



48 





Total... . 





49 





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 cf 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, 0S2 

 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 



lib, 510 

 91,440 



150, 500 

 84, 170 

 90, 570 



130, 750 



19, 975 



Beaver Dam No. 2 





12, 841 



Manigault Branch 





18, 103 



Mill Branch 





6,700 



13, 2S0 



Ttio Savannas 





10, 370 



Rum Branch 





5. 400 



1,600 



18, 255 



Hurricane Branch 







1,243 



Laterals (38) 







223,050 



5,500 



69, 082 











Total for Boggy 

 Swamp water- 









163, 762 



16, 800 



6,020 



18, 658 



205, 240 





'! 





