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HADDMS Drainage Data Formats Issue 1, Mott MacDonald, 2012
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IAN 147-12 Final Published, Mott MacDonald, 2012
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CD 535 Drainage Asset Data and Risk Management (formerly HD 43/03), Revision 1, 2019
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CS 551 Drainage Surveys (formerly SD 15/03), Revision 0, 2019
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IAN 147 Point Symbology, Revision 1
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