Brainer and I have got you a gift, As I am very unoriginal it's the same thing I got you last time.
It's a Canal
It's a great Northern Canal so we've called it "Great Northern Canal"
With thanks to: Gaffer, Barricade, Explora, Ehizelbob, Carrera, Finn, Deri, Jarislief, Fairyshine, Yuri, Shadyone.
They swung picks they strong walled or they made supports.
Special mention to Moosig who basically rearranged his whole deed on the south end to allow the road to pass through and the allow for better access by boat.
Honorary mention to Fitch/Chubby who dug the canal linking the little lake to Spawn lake (which has now been dredged to allow for deep water passage).
If you're trying to find it on the North coast you'll see the obelisk, it comes out west of Venalicium Draconis even though it's East on the map, it is a straight line N/S from the lake though.