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Nantmel Landfill Site
Nantmel Landfill Site is a closed waste-disposal site situated in the community of Nantmel, Llandrindod Wells, Powys, Wales. It operated from 1960 to 1990, accepting domestic, commercial, non-hazardous industrial, inert and asbestos waste. It was one of 80 municipal landfill sites in Powys, of which all have now closed. Three privately owned sites still operate within the county.〔(Local Authority Factsheets: Landfills in Powys ) pp. 35. ''The Environment Agency''〕 The site still produces significant pollutants, in the form of gas and leachate from landfill decomposition, and is currently undergoing rehabilitation.〔
==Structure==
The 8.5ha site was constructed in a valley, with the stream piped underneath and the waste lain on top, forming the present day dome shape, characteristic of many landfills. Unlike modern landfills, which are impermeably sealed with geomembranes, Nantmel was engineered without effective base and cap layers, for instance subsoil from a local road-widening scheme was used instead of a liner.
Intended to be reclaimed for pastoral purposes, the site was fenced, but the availability of higher quality pasture in the surrounding fields led to little interest from farmers. Without the compaction and grazing by farm animals, the plants and topsoil became low quality, and the intention now appears to leave the site for conservation purposes.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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