CONSTRUCTION NOTES 251 



Average earth, 2.925 man hours. 



Tough earth, 3.21 man hours. 



Hardpan or wet clay, 4.66 man hours. 



The cost for excavating of trenches figured at these rates will not cover 

 the cost of removing the surplus material not needed for backfill, and a 

 separate estimate should be made to cover this cost if there is to be any 

 material removed. 



Trench excavation (deep trench over six feet deep, see figure I on 

 Plate 108). 



Depth of trench excavation, 7 feet. 



Width of trench, 27 inches. 



Total length of trench excavated, 697 feet. 



Total excavation, 406.6 cubic yards. 



Total labor hours required, 1,220. 



Labor hours required per cubic yard of excavation, 3. 



Labor hours required per lineal foot of trench, 1.75. 



Backfilling of trenches. 



Depth of trench, 3 feet. 



Width of trench, 1 8 inches. 



Total length of trench backfilled, 654 feet. 



Total cubic yards of trench backfill, 109. 



Total labor hours required for backfilling, 90.5. 



Labor hours required per cubic yard of backfill, .83. 



(This includes backfilling in layers not exceeding 12 inches in depth 

 and tamping or puddling.) 



Laying tile (open joints, see figure 7 on Plate 108). 



Total length Total labor hours Labor hours p?r 



Size of tile of tile laid required lineal foot 



4 or 6 inches V. S. P. 198 linear feet 9 .045 



4 inches Agricultural 450 linear feet 15 .033 



1 8 inches V. S. P. 180 linear feet 12 .066 



Laying tile (cement joints, see figure 4 on Plate 108). 



Total length Total labor hours Labor hours p:r 



Size of tile of tile laid required lineal foot 



12 inches V. S. P. 225 linear feet 15 .066 



1 8 inches V. S. P. 320 linear feet 40 .125 



Catch basins (brick, see figure 2 on Plate 107). 

 Approximate size of catch basin, 6 feet deep by 3 feet wide inside. 

 Total materials required, 600 common brick plus 4 bags cement. 

 Total cubic yards of excavation, 4.5. 



