| 21. | The technical criteria applicable to main drainage systems depend on the hydrological situation and on the type of system.
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| 22. | Matilija Creek is Ventura River's most significant headwater and tributary, and adds to the length of the river's main drainage.
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| 23. | At the heart of the Noordoostpolder, where the three main drainage canals intersect, is the town of Emmeloord ( 1943 ).
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| 24. | An extensive network of drainage channels was created, the main drainage ditches being built to act simultaneously as canals for boats.
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| 25. | In 1912 during the construction of a main drainage scheme to Rathfarnham, a stone causeway was uncovered below the road level.
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| 26. | The main drainage of Muggins Wash which drains from the north-northwest contains areas of the " Peucephyllum ", the desert fir.
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| 27. | The Bush Estate was originally a simple holiday retreat, with just one well between the inhabitants and no mains drainage or power.
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| 28. | Many of the main drainages for the regions were sampled for placer gold by means of panned concentrates performed in the field.
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| 29. | Now called the " Kyk-Yodo River ", it is a major waterway in central Osaka and the main drainage of Neyagawa river.
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| 30. | New Marston seems to have received a mains water supply by the end of the 1870s and mains drainage by the 1920s.
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