| 11. | Shortly thereafter, work began on the drainage and sewerage systems.
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| 12. | Things did not improve until the introduction of modern sewerage systems.
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| 13. | The length of the sewerage network was 118, 000 km.
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| 14. | In 1906 the Claisebrook and Burswood Sewerage Treatment Works was built.
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| 15. | The Council's sewerage works were completed during the 1940s.
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| 16. | Only half of Japan's homes are connected to sewerage systems.
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| 17. | Some cities don't even have a sewerage system ."
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| 18. | In the end, money and sewerage will be the big issues.
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| 19. | Hawass has proposed building a new sewerage system just for this area.
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| 20. | Metro Needs Sewerage Treatment Plant : ADB Study, BUSINESS DAILY
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