The Environment Agency expects the centrepiece of its Slowing the Flow project to be completed this summer.
In its latest newsletter updating residents on the progress of the scheme, the agency is expecting construction of the flood storage area in Newtondale, near Pickering, to be finished and the site demobilised by the end of September.
However, some seeding and tree planting may be completed later in the year.
Footpaths that run on either side of Pickering Beck through Newtondale will remain closed for the construction period. Alternative routes have been signposted and walkers are asked to be mindful of construction traffic.
The reservoir has been designed to hold back around 120,000 cubic metres of flood water and should improve the standard of protection for Pickering from its current 10 per cent chance of flooding in any given year, to a four per cent chance or less.