This game needs some bridges to cross over the small rivers. Sometimes we cross the same river over and over, and lifting the boat every time is kind of boring
my idea is that the work like the fence's corners, where you put the base and then extend it in one direction over the water with a limit of how long can you extend it; that way you need to go to the other side to make the other end and extend it from there so they connect in the middle. limiting tiles from the brige's base prevents the players from making uber-huge lake crossing bridges.
start river end
O-------> <---------O
something like this
Adding more deptth to this there could be two kinds of bridges, wooden and brick
while the wooden only is about 1 tile wide you can't pull a cart through this. The one made of brick is wider and can be built over a longer distance