I would like to point out that some parts of the area that you highlighted in red overlaps a teeny tiny bit of Schprit's massive cone structure situated right beside Penguindocklands:
(http://www.opticraft.net/proxy.php?request=http%3A%2F%2Fi.imgur.com%2Fyf43T1y.png&hash=db058fbbf654b44245dc6beb360964cc)
He needs to finish building that part. You might want to temporarily add Schprit to the City Protection field, long enough for him to finish what he started. You can remove him from the addition later after this is sorted out.
Meeting him in-game would be best.