Tylorstown Landslip Remediation Phase 4

Concepts

• excavating and earthmoving
• tonypandy
• llanwonno upper tip
• future landslips
• tylorstown landslip remediation phase
• tylorstown landslip scheme
• remediation
• current landslip
• village of tylorstown
• tylorstown tip

Location

Rhondda Fach. Tylorstown.

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.

Total Quantity or Scope

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.

Award Criteria

CPV Codes

• 45112000 - Excavating and earthmoving work

Indicators

• Bids should cover the whole contract.
• Renewals are not available.
• Professional qualifications are sought.
• Award on basis of price.

Other Information

NEC 4 - OPTION A will be used for this project. NOTE: The authority is using eTenderwales to carry out this procurement process. To obtain further information record your interest on Sell2Wales at https://www.sell2wales.gov.wales/search/search_switch.aspx?ID=116116 The Contractor shall ensure that all contracts with Subcontractors and Suppliers which the Contractor intends to procure following the Award date, and which the Contractor has not, before the date of this Contract, already planned to award to a particular Subcontractor or Supplier, are advertised through the Sell2Wales portal (www.sell2wales.gov.wales) and awarded following a fair, open, transparent and competitive process proportionate to the nature and value of the contract. Under the terms of this contract the successful supplier(s) will be required to deliver Community Benefits in support of the authority’s economic and social objectives. Accordingly, contract performance conditions may relate in particular to social and environmental considerations. The Community Benefits included in this contract are: Welsh Themes, Outcomes and Measures (TOMs) (WA Ref:116116) The buyer considers that this contract is suitable for consortia.