122 



ANTOFAGASTA IIAILWAY WATERWORKS. 



storac^e reservoirs in San Pedro, some 00 kilometres in length, 

 to carry water suitable for domestic purposes was laid down in 

 1909/1910. 



In 1911 the old pipe line from San Pedro to Antofagasta was 

 found to be unable to deliver all the water required for the needs 

 of the town, and it was decided to continue the No. 2 pipe line 

 to the port, the work being completed in October, 1913. 



This short historical review therefore brings us to the present 

 date, and briefly recapitulates the growth of the undertaking. 



Intakes and Storage Eeservoirs. 



There are four sources of supply from which the Company 

 has the right to take water, viz. : — 



San Pedro Ptiver ... 10,712 feet above sea-level 

 Palpana Springs ... 11,800 ,, 

 Polapi Springs ... 12,486 ,, 

 Siloh Stream 14,154 ,, 



and all are being drawn upon. The latter three are all waters per- 

 fectly suitable for domestic and locomotive boiler consumption, 

 but the San Pedro River is very hard and contains an excess of 

 calcium carbonate, and on that account is only delivered to the 

 nitrate oflcinas 'for the boiling of the nitrate earth, where the 

 quality of the water is negligible. 



The following is a comparative analysis of the San Pedro 

 Piiver and Siloli stream waters. 



Analyses made by Chilian Government analyst, Santiago. 



San Pedro Eiver Siloli stream 

 (in parts per 100,000.) 



