Construction of tilting weirs at Hatfield SAC part of Humberhead Peatlands NNR

Tender description

Natural England’s (NE) Hatfield Moors Peatland site, restoration project proposes to incrementally increase local water levels to enable re-establishment of the native peatland species and return the currently drained peat land to a natural habitat. To achieve this, various manmade water channels are to be controlled to impound water and saturate the surrounding peat land. This will be facilitated by the installation of cut-off piles and the provision of adjustable tilting weirs that will enable modification of the upstream water levels. Hence, scope of works is as follows; to supply and install 3 tilting weirs around NE Hatfield Moors Peatland site with associated water control valves across the existing drainage ditches, this includes installation of cut-off sheet piling to support the provision of the tilting weirs and installation of hand rails. Additionally, the works will include an aspect of re-profiling earthworks. NE are the ‘Client’ with Mott MacDonald acting as the Principal Designer and Project Manager for NE on this project, who have produced a suite of documents and drawings for this tender pack, which inform the basis of the specification and working instructions, dated 2nd January 2018, to be carried out by the Principal Contractor, who will be the supplier appointed following this tender. Key Objectives are to deliver the project effectively and ensure that project completion and operational use is achieved by the 30th June 2018. Please note that a site visit is mandatory for tender - contact David Hargreaves to arrange via email on: David.Hargreaves@naturalengland.org.uk