Project for increasing the structural safety of the “Chelopech” tailings storage facility

Contracting Authority
Dundee Precious Metals

Chelopech, Bulgaria

Period of implementation
April 2022 - January 2023
Glavbolgarstroy’s role in the project
Prime contractor "GBS - Global Construction"
Nature of works

earthworks at the southern wall of the "Chelopech" tailings storage facility

Technical characteristics

The construction was conducted in a phased manner, without disrupting the facility's ongoing operations. Ground facilities, elements of the control and measurement system on the southern wall, pipelines, and other adjacent infrastructure were sequentially developed. Various preparatory tasks, such as excavation-filling work for temporary roads and overloading, concrete work, and drilling, were also carried out.

These completed activities mark the fourth and final phase of the site's implementation. They encompass the establishment of a drainage layer along the slopes of the southern wall, bottom drainage along the gully leading to the retaining wall, drainage strips, and drainage ribs. Additionally, the embankment of the main wall was reinforced, and a comprehensive control and measurement system for the wall, consisting of piezometers and measuring marks, was implemented.