OVBRHAUi* 87 



likely to be a little problem by itself. The functions of the bal- 

 ancing line will most clearly be seen by referring to the en- 

 graved sample profile, Fig. 2. We have here the first point of 

 it, A, the beginning of the section; B, the end of Ole Oleson's 

 job; C, the end of John Johnson's job; D, the end of Teapot 

 Kofeeson's job; E, at station 240, the dividing point between 

 backward and forward hauls in the cut; F, station 252 + 30; J, 

 junction point of forward and backward hauls in the fill; G, 

 the point where waste commences in the second cut, apd H, 

 the end of the section. 



The Taking Off of the Results. From A to D there is no 

 overhaul, but the nature of the material and any other items 

 can be conveniently recorded there. The fill between D and K, 

 is made from the cut between K and E. We first fix the posi- 

 tion of the limit of haul (1,000 ft.) which here comes between 

 stations 226 and 236, and then draw the intervening lines of 

 overhaul to each point of flexure of blue and red lines. We 

 now read the elements of the cut between these lines of haul, 

 from the profile, or if we desire great accuracy, from the data 

 prepared for plotting the profile and tabulate them. Each of 

 these elements multiplied by its respective distance overhauled 

 will give equivalent quantities overhauled to one station; as 

 for example, 



1680 + 1570 



224 cu. yds. x 1000 = 224 x 6.25 = 1390 



2 



The sum of these partial products will give the total overhaul 

 for the cut. The tabulation should always be verified, by see- 

 ing that the sum of the elements of the blue or red curve, as 

 the case is, is equal to the difference between the extreme or- 

 dinates. 



If E to K is rock or D to K is a sink hole, the line E D will 

 be inclined, and should be prolonged to an intersection with 

 the horizontal through K. This intersection then becomes a 

 pole, through which the lines of haul are drawn. The method 

 is so flexible it can be applied to anything which can be exe- 

 cuted in earthwork, and in addition gives a record of what has 

 been done. It is also used to make the preliminary distribu- 

 tion of material before the work is begun. [The following is 



