This wooden barricade wall sits at the foot of the old Dwemer ruins of Arkngthand, and is impassable. To access the nearby Foyada Quarry Battleground, head to the Molag Amur region.
The Elder Scrolls Online: Morrowind eGuide The Atlas of Morrowind Ascadian Isles
Foyada Quarry (INACCESSIBLE) (Arkngthand)