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Title: Study of ferruginous minewater impacts in Wales : phase 2a determination of remedial options : volume 2 : site reports
Author: National Rivers Authority Welsh Region
Document Type: Monograph
Site 5 is a discharge on the right bank of the Sirhowy River just downstream of a footbridge in Blackwood. The discharge almost directly overlies the Old Rock Colliery Shaft. The discharge flow combines with clean run-off before entering the main stream of the river. A number of small diffuse seeps were also observed upstream from the site. The discharge is situated near to the axis of the Blackwood Syncline, this being a gentle west-east striking structure which plunges at a shallow angle to the east. The Mynyddislwyn seam of the Upper Coal Measures underlies the area at shallow depth and outcrops a short distance to the north. The area is also underlain at a depth of about 300 m by the Brithdir Seam and by other seams at greater depth.
Publisher: National Rivers Authority
Publication Date: 1994
Publication Place: Cardiff
Subject Keywords: Water pollutionEffluentsIndustrial pollutionMine spoilIronPollution control measures
Geographic Keywords: WalesSouth East Valleys
Extent: 116; + figures, tables and appendices
Total file downloads: 5

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