236 PROCEEDINGS OF THE CANADIAN INSTITUTE. 



start at say the intersection of Gerrard Street and Yonge Street^ 

 thence along Gerrard Street East, intercepting Church and Jarvis 

 Street sewers until we meet Parliament Street. Thence down Par- 

 liament Street to a little South of King Street, where a flushing tank 

 would be situated. From the flushing tank we would continue 

 South to Front Street, then turn East along Front Street till we 

 meet the Don River. Then sink under the bed of the river to the 

 Eastern side, then follow down the angle made by the bed of the 

 river with its East bank to its new outlet, then turn a little to the 

 East out of the current of the stream and continue out to deep 

 water. Starting from the corner of Parliament and Gerrard, a part 

 of the present Parliament Street sewer may be utilized as far south 

 as Shuter Street. We would there tap the present sewer and take a 

 branch to our flushing tank. The flushing tank and the approach to 

 it would be capable of containing about 500,000 gals, of water and 

 would have an elevation of 32 feet. The outlet pips from the tank 

 out into the Lake would require to be a steel one 6 ft. in diaraetei',. 

 and this would constitute the root of the tree. 



The main branch would be an intercepting sewer along Front 

 Street from the Garrison Creek sewer to Parliament Sti-eet, where 

 it would connect Avith our outlet pipe. The second branch would be 

 a similar intei'cepting sewer on the east side of the Don from about 

 Pape Avenue and running west to join the outlet pi[)e at the east 

 bank of the Don. Then when the present King Sti-eet West sewer 

 is completed from the Subway to Dufierin Street we would have the 

 whole city from west of Dufferin Street to east of Pape Avenue pro- 

 vided for. 



The junction of the branches on Front Street East and West would 

 be provided with check valves so hinged that they would offer no re- 

 sistance to the flow of waher towards the outlet, but as soon as the 

 pressure came in the opposite direction they would close and prevent 

 regurgitation in the sewer. 



This would tlien be the working of the system. All the sswage in 

 that part of the city north of Gerrard Street would be bronght down 

 the Parliament Street sewer and into the flushing tank, which would 

 be furnished with an automatic flushinof arransement so that when 



