Park

Today when I went down to the park for the second time, it was cloudy, the ground was mostly wet and it was a bit windy in some places.
When I was near the end of the breakwater, I saw an eagle fly by, and shortly after that, a sea gull flew from the rocks on the breakwater.
When I was out on the breakwater, I saw that a least two of the posts out in the water were broken. One of them was broken off lower than the other and almost under the water, and two posts were also tilting sideways. I also saw some ducks in the water and a sea gull on one of the posts.
When I was at the battle site bench, it was low tide and I saw one sea gull out by the water.
When I was on the trail by the trail by the river, I didn’t see anything out on the beach.
When I was on the trail by the river, I saw some ducks on the other side of the river.
How were those posts broken?
When were they broken?
Why was there only one sea gull out by the water?