From City Parks & Rec release:

Belle Isle users asked not to litter while service bridge is closed

Richmond’s Department of Parks, Recreation and Community Facilities would like for individuals who use Belle Isle to be careful not to litter and to carry their own trash off the island while the park’s service bridge is closed for repair.
The vehicular service bridge located on the south side of the island was closed for repair following a safety inspection on January 12 that revealed cracks in the welded connections, which compromise the safety of the bridge.
This bridge was built in the early 1990’s primarily to provide access to the island by park maintenance and emergency vehicles. This bridge is NOT the suspension bridge used by pedestrians on the north side of the island, nor the footbridge that crosses the railroad on the south side of the island, which both remain open.
Closure of the service bridge currently eliminates vehicular access to the island and hampers the park staff’s ability to remove garbage.
Repairs to the bridge are expected to take eight to ten weeks, during which time the bridge will remain closed.

My personal plea: Please don’t bring glass bottles to the riverfront.