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Title: Delabole Stream (abandoned minewater) water quality investigation (total zinc)
Author: Peter Long
Document Type: Monograph
The Delabole Stream has been shown to experience elevated total Zinc concentrations downstream of Delabole slate quarry. Data from upstream of the quarry show Zinc concentrations to be generally low. The quarry is in the process of being consented for Zinc under the Dangerous Substances Directive. Data since 1994 show that all sites on the Delabole Stream downstream of the quarry would have exceeded the current River Quality Objective (RQO) standards for Zinc, had there been designation. An investigation in 1999 showed the quarry to be a significant source Zinc to the catchment. However, it was also found that abandoned mine workings discharging into the quarry were contributing significant Zinc loadings. Until the impact of this minewater discharge can be assessed, the consenting process can not be satisfactorily progressed. The objective of this document is to provide data of Zinc loadings into Delabole slate quarry from the previously identified source of abandoned minewater drainage.
Publisher: Environment Agency
Publication Date: 2001
Publication Place: Dorset
Subject Keywords: QuarryingRiver Quality ObjectivesRiversZincWater qualityDischarge (hydrology)Chemical monitoring
Geographic Keywords: DelaboleNorth Cornwall, Seaton, Looe and Fowey catchment
Extent: 3; + figures, appendices
Total file downloads: 274

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