the last information i got is
Due to high water levels at Lewisville Lake, the day use areas at Lewisville Lake Park are closed until further notice.
This temporary closure includes the swimming beach, picnic areas and boat ramps at Lake Park and the boat ramp at Tower Bay. The athletic fields, golf course, campground and fishing barge at Lake Park are not being closed at this time.
The closure is expected to last at least several weeks until the lake level has lowered and any needed repairs can be made to Lewisville Lake Park.
so it says fishing barge is open.http://visitlewisville.com/index.aspx?page=977