Havant Thicket Reservoir - Hermitage Stream Catchment Restoration Project

Tender description

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.