USE, CONSTRUCTION, AND COST OF SERVICE RESERVOIRS. 



163 



Of Type H, five reservoirs have been constructed, their 

 dimensions capacity and cost being as follows : — 



No. 

 1 



Dimensions. 



Avail, cap. in gals. 



Cost per 1000 gals. 



200' x 115' x 10' deep 



985,600 



£5 10s. 



2 



180' x 60' x 12' 



789,000 



£6 15s. 



3 



194'6"xl94'6"xl0'„ 



2,235,000 



£2 lis. 6d. 



4 



1206' x 906' x 17' „ 



98,500,000 



19s. Id. 



5 



100' x 50' x 33' 



946,396 



£3 9s. 



For the sake of comparison, I may describe and give the cost of 

 one cast iron tank lately erected by the Water and Sewerage 

 Board, and marked as Type I in the schedule of reservoirs at- 

 tached to this paper. 



This tank, which is constructed of cast iron plates, is twenty- 

 seven feet square and five feet deep, with a flat bottom, and is 

 erected at the height of twenty-four feet six inches above ground 

 level on brick piers connected by arches on top. 



No. 

 1 



Dimensions. 



27'x27'x5'deep 



Avail, cap. in gals. 



20,000 



Cost per 1000 gals. 



£45 



The greater number of the reservoirs described in this paper 

 were designed and carried out under the direction of Mr. E. O. 

 Moriarty, M. Inst. C.E., late Engineer in Chief for Harbours and 

 Rivers, and nearly the whole of them were worked out in detail, 

 and the contract plans prepared by Mr. T. Pridham, Assoc M. 

 lust. C.E., Principal Assistant Engineer for Water Supply, to whom 

 much credit- is due for the success that has been met with in 

 carrying out so many large reservoirs without a mishap of any 

 kind worth mentioning. 



