The National Agricultural Research and Extension Institute (NAREI) on Wednesday inked two contracts totaling $21.5M with S&K Construction Services to improve river defence on the coastland, a release from the Ministry of Agriculture said.A total of 265 metres of brushwood dam would be constructed along the foreshore of Walton Hall, Essequibo Coast, Region Two. This project worth $11,529,100 involves the construction of two dams measuring 140m and 225m.Construction of this structure is expected to begin in August 2016 with two months’ duration. The contractor will begin mobilizing resources new week. The defects liability period is also two months, the release said.Meanwhile, the contractor will commence construction of 240 metres of brushwood dam at Lusignan, East Coast Demerara, Region Four in September 2016. The contract duration is two months. The defects liability period is also two months.This project entails the construction of one dam measuring 60 metres perpendicular to and 180 metres parallel to the foreshore for the eastern reach. The brushwood dams would be placed one metre from the sea defences and 240 metres away from the sluice outlet, the release added.