83
Brought forward
$2,529,000.00
Item 7 Pumping Mains.
Two 18" C.L. Mains including valves, hatch boxes for
scraping 30,000'
375,000.00
Item 8 Gravitation Mains.
One 15" C.I. Main including valves, hatch boxes for
scraping 12,500′
125,000.00
One 12" C.I. Main including valves, hatch boxes for
scraping 5,800′
43,500.00
Item 9 Subsidiary Mains.
6" C.I. main including valves and hatch boxes for scraping
92,600 lin. ft.
370,400.00
Item 10 Service piping in streets and scavenging lanes.
2" galvanized iron piping 370,400 lin. ft.
370,400.00
Item 11 Alterations and Additions to existing sewers.
Allow sum of $100,000 for Contingencies
230,000.00
100,000.00
Total Cost.
$4,143,300.00
CONCLUSION.
I would recommend, as a first step towards a general water flush scheme, the adoption of the fresh water flush in the middle level zone, where the inhabitants can be relied upon to give the necessary supervision to sanitary appliances. The cost of the scheme is small and its adoption will provide in its effect further material for pursuing the subject of Harbour pollution and the planning of the salt-water flush scheme.
E. NEWHOUSE.
3rd February, 1927.
Drainage Engineer.