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In the field of land drainage, a highland carrier is a watercourse that conveys drainage water coming from higher in the catchment across or around a lower, drained area of land, but has little or no connection with the drainage network of that drained area. Such a carrier is enclosed by levees.
References
"Highland carrier". Association of Drainage Authorities. Archived from the original on 2013-10-20. Retrieved 2013-11-22.
