Did any vehicle "hit" the open hole?
At least one. One of our local rollback trucks hit the hole, luckily with the rear tandem. It destroyed one of the wheels and of course the tire. I will see if I can get the pic.
Did any vehicle "hit" the open hole?
The submarine is actually a between the world war submarines. There is a WWII submarine sunk in the Potomac, a German war prize. Navy EOD practice dives on the boat sunk off of point patience. Somtimes you will see a Navy ocean going type tug anchored off of the Navy Solomons, the divers support ship.
Actually they make very nice swinging targets...
Maybe they sold it to Hickok45...
Could have been some surveyors, who tried to open up an stuck manhole lid with a heavy mall hammer and put a crack in the lid --- With vehicular traffic making the crack worse where it eventually fell in.
If it did fell in.. they would have seen signs of it falling on the catwalk underneath the bridge what not.I'm sure if any surveyor's had a cracked lid fall in to the manhole while working, they would have tried to standby and wait for traffic control to help out --- Which happened to one of our own survey crews one year. I will not try to open a manhole lid that has a crack already in it. Manhole lids must {if necessary} be hammered on the edges of the lid {not the center} in order to loosen up the cover so you can "pop it."