Here are some ploppable marina piers. They are low poly and have all the textures applied.
- Cities XXL Community MOD
BE CAREFUL before placing them in your city because they require different road heights. So try placing one to see if the height is OK before placing any others (you don't want to layout your entire marina just to find out the road is too high or too low). You will see under the in game pics spoiler that some of them are a bit too high and some are a bit too low...
What you get: