valkushyk lock (), wołkuszek lock () is the sixteenth lock on the augustów canal (starting from the biebrza). it was built in 1829 by wojciech korczakowski in the wołkuszanki estuary. it is the first of three locks situated on belarusian territory (at a distance of 1600 meters from the polish border). in 2005–2006 it was rebuilt by the belarusian government.