I thinks this will work
static{
pathToSewer.add(new Position(3246, 3433, 0));
pathToSewer.add(new Position(3246, 3450, 0));
pathToSewer.add(new Position(3238, 3457, 0));
}
or
List<Position> pathToSewer = new ArrayList<Position>(Arrays.asList(new Position[]{new Position(3246, 3433, 0), new Position(3246, 3450, 0), new Position(3238, 3457, 0)}));
or use
https://explv.github.io/?centreX=3108¢reY=3315¢reZ=0&zoom=7