238 ACTUAL COSTS AND CAPACITY OF GASWORKS. 



thorough system of drainage from all the spouts and the 

 boiler blow-off was put down, consisting of 4-inch drain 

 tiles, with traps, where required, and two inspection 

 boxes. The drainage system is shown in Fig. i (p. 200). 

 It was also necessary to compensate the former tenant for 

 disturbance and tenant right. 



The total cost of levelling up, forming roadway, drainage 

 and other small items was jfiSi. 



General conditions. The contracts for the various 

 portions of the work were subject to the standard clauses 

 approved and recommended by the Institution of Gas 

 Engineers and the Society of British Gas Industries. 



Main lay ing. Along the branch road leading from the 

 works to the highway a g-inch main, 320 yards long, is laid, 

 with 6-inch branches in the two directions. The average 

 depth of the mains is 2 feet 6 inches. The bulk of the 

 excavation was let by contract, but the jointing and 

 laying of pipes was carried out by the employees of the 

 company. The contractor was required to form handholes, 

 to facilitate the jointing of the pipes, but, as a rule, the 

 pipes were jointed in two lengths outside the trench, thus 

 necessitating only one handhole each 18 feet. The con- 

 tractor was required to separate the excavated material 

 into (i) surface covering, (2) pitching, and (3) soil or 

 other material ; the last named being replaced first, 

 then the pitching and surface covering. To comply with 

 the requirements of the rural authority, it was necessary to 

 provide a quantity of pitching and covering material so as 

 to leave a depth of such material of 9 inches and 3 inches, 

 respectively. The contractor provided, also, all picks, 

 shovels and tools necessary for excavation, and also watch- 

 men, when the trench was left open after working hours. 

 It was specified that he should have his workmen insured 

 against any claims under the Workmen's Compensation 

 Acts and the Employers' Liability Acts. 



The following is the schedule of the lengths of mains 

 and cost of same. It should be explained that the 

 pipes are of cast-iron, except the 2-inch, which are of 

 wrought-iron, and laid at a shallower depth than the larger 

 sizes : 





