Hermitage Stream Catchment Restoration Framework Agreement

Tender description

Portsmouth Water is seeking contractors to undertake improvement measures to watercourses and habitats in the Hermitage Stream Catchment affected by the new Havant Thicket Reservoir Project. The procurement is for a multi-supplier framework agreement for works. Suppliers should be able to demonstrate design and build capability based on broadly similar projects for undertaking improvement measures to watercourses and habitat. The scope of works entails civils and environmental improvement measures. Further information about the scope of the works and the procurement process will be provided to suppliers responding to this Contract Notice. Lot 1: Portsmouth Water intends to proceed by procuring a framework agreement to enable mini-competitions for the detailed design and construction of works as required. There will be a two stage selection process. A pre-qualification stage will select 4 suppliers to submit their tenders for a specified package of works. The highest scoring supplier will be awarded the first call-off contract and the top 3 bidders appointed to the framework agreement. Further works will be awarded on the basis of a mini-competition under the terms of the framework agreement. On different reaches of watercourses within the wider catchment of the Hermitage Stream a combination of detailed design, civil engineering and environmental measures will be required such as: - removal of concrete bed and banks; - replacements of headwalls; - reprofiling bed and banks; - redistribution of bed material; - erosion protection measures; - new channel creation and backwater features; - removal of trees and coppicing; - replanting; - addition of wood into channels; - pond creation; - localised bank excavation and reprofiling; - flood plain excavation; and - removal of existing bank protection.