Tylorstown Landslip Remediation Phase 4

Tender description

On Sunday 16th February 2020, Storm Dennis caused the Llanwonno Upper Tip to fail above the village of Tylorstown. Approximately 60,000m³ of material slipped down the valley, filling the valley bottom and diverting the course of the Afon Rhondda Fach. Emergency works (referred to as Phases 1, 2 and 3 of the Tylorstown Landslip scheme) have been undertaken to remove the slipped material from the river and valley bottom. Rhondda Cynon Taf County Borough Council is now proposing essential stabilisation and remediation works to ensure the colliery material within the Llanwonno Upper Tip is made safe, preventing future landslips such as the one that occurred in February 2020 and demonstrating that the relocated and remaining in-situ material can be regenerated for a beneficial end-use. To achieve this, the majority of the colliery material at Llanwonno Upper Tip will be excavated and transported along a haul road to a new location, referred to as the ‘Receptor Site’, next to Old Smokey. Lot 1: The proposed scheme will involve moving colliery material from the Llanwonno Upper Tip (donor site) to a new receptor site adjacent to Tylorstown Tip, otherwise known as Old Smokey tip. It will also provide for stabilisation and remediation works to the Llanwonno Upper Tip site and remaining material. The overall site area totals circa 31 Ha and the main elements of the application contained within it are as follows: Removal of material remaining within Llanwonno Upper Tip on the top of the hillside, amended drainage arrangements and landscaping of the area following the removal to stabillise the tip; Reprofiling of the upper tip is to be undertaken utilising the in-situ landscape material (i.e. smoothing out the current landslip “bowl” to the proposed levels, with no interim storage of material needed), plus associated drainage and landscaping works; Transportation of the material to be deposited on the nearby receptor site; Profiling, drainage and landscaping of the receptor site.