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Drainage sump locations within the Metropolitan Region of Western Australia, showing retaining walls at stormwater pipe inlets or outlets. The dataset includes attributes for asset ownership, maintenance responsibility, and mapping comments, provided by Main Roads Western Australia for informational reference.
Data is under a Creative Commons Attribution license with a disclaimer of warranties; users must include attribution to the Commissioner of Main Roads when sharing. Intended for reference only, not as a definitive source for ownership or maintenance details.