Subproject 1 concerns the project of Upgrading and Expansion of various rainwater drainage infrastructures located on the island of Chios and is the responsibility of the Chios DEYA, such as additions of sand collectors and networks on Kaloplytou Pachnou and Demogerontia streets as well as construction of a new network on Vasilikari Damala Korai Xenomidi Ioustinianis Papagiannis Giala Floskou Street and the end of Karra and Panagia Letsiani Street.