This happened in York 30 years ago, didnt look like there was any damage to the digger, not much hold them types of bridges in place, but then they don’t engineer for numpties.
Some drone aerial photos from a local journalist on Twitter:
For anyone still in doubt about the boom hitting the bridge…
(Gotta say those drone images are pretty good quality, I zoomed this image to x500)
Another picture to mull over.
Very considerate to use the dumper for some of the debris 
Glen A9:
Some drone aerial photos from a local journalist on Twitter:
Eddie is a top bloke and well worth a follow on Twitter. Some of the drone shots are pretty excellent.
HDL:
Maybe the dumper hit it and got pushed back into the digger.
Looks like the smoking gun here.So not the digger but the dumper. 
toshboy:
Carryfast:
eagerbeaver:
This could end up being a VERY expensive day for the local council. Assuming the low loader driver is no higher than 16’ 6", if it turns out that he needed to use the hard shoulder and the mast has struck the concrete bridge bringing it down, he has ended up striking an UNMARKED LOW BRIDGE!!The hard shoulder surely must still count as the carriageway.
^ This.Motorway bridges are unmarked because their minimum height is a given.
Could be that the Digger hydraulics were not locked after loading
would need to be running then
Ok maybe it’s just me but if it is the digger that’s took it down,would have thought it would have gone further through,considering its hit on the hard shoulder it’s took it down straight,to take it down straight surely you would need to hit it in the middle where the box trailer is.
Daytrunker:
Ok maybe it’s just me but if it is the digger that’s took it down,would have thought it would have gone further through,considering its hit on the hard shoulder it’s took it down straight,to take it down straight surely you would need to hit it in the middle where the box trailer is.
The photos clearly show that the digger arm wasn’t high enough to hit the bridge.
pbs.twimg.com/media/Cq4cbiHXYAA6guW.jpg
While it looks like it was a dumper loaded on the raised forward kneck of the trailer load deck which hit the bridge.The dumper was pushed back while the bridge was pushed forward off of its support post then collapsed past any point not supported by the opposite post.
Another angle from Eddie Mitchell’s drone pictures.
Shows it is a low trailer and does look like the dumper has been moved back from the neck of the trailer if that’s where it was.
I think the initial strike by the digger caused a stress fracture in the bridge span (if you look at the aerial photos the span has broken directly above the low loader),
That digger arm would be like a massive battering ram fracturing the concrete easily, this causing it to sag only the metal rebar inside the concrete barely holding it up, it then got struck by the artic which has ripped it off its mounting and dragged it forwards. So it was a double whammy that took it down.
norm:
I think the initial strike by the digger caused a stress fracture in the bridge span (if you look at the aerial photos the span has broken directly above the low loader),
That digger arm would be like a massive battering ram fracturing the concrete easily, this causing it to sag only the metal rebar inside the concrete barely holding it up, it then got struck by the artic which has ripped it off its mounting and dragged it forwards. So it was a double whammy that took it down.
pbs.twimg.com/media/Cq4cbiHXYAA6guW.jpg
Unless that’s a massive camera angle illusion there’s no way that digger arm was high enough to contact the bridge and there’s no way that the bridge could have collapsed ahead of the dumper loaded in front of the digger.
d4c24a:
would need to be running then
Clearly the driver isn’t a proper low loader driver, D4…he’s closed the cab door. 
What do you think of moving it with the bucket in face shovel position?
Why was he driving up the hard shoulder in the first place.
Was he trying to avoid a motorcyclist in the road 
Carryfast:
norm:
I think the initial strike by the digger caused a stress fracture in the bridge span (if you look at the aerial photos the span has broken directly above the low loader),
That digger arm would be like a massive battering ram fracturing the concrete easily, this causing it to sag only the metal rebar inside the concrete barely holding it up, it then got struck by the artic which has ripped it off its mounting and dragged it forwards. So it was a double whammy that took it down.
pbs.twimg.com/media/Cq4cbiHXYAA6guW.jpg
Unless that’s a massive camera angle illusion there’s no way that digger arm was high enough to contact the bridge and there’s no way that the bridge could have collapsed ahead of the dumper loaded in front of the digger.
I’ve got to totally agree there, digger arm doesn’t look damaged either .
Just tried to look on “Auto Renovations” website, and it’s down. It says “bandwidth exceeded.” So was the height limit.
d4c24a:
dumper on the neck is no where near high enough
Maybe the digger arm v post photos are just an illusion and maybe the dumper wasn’t even loaded on the neck deck of the trailer anyway.While if it was the digger arm that hit the bridge why would anyone with any sense take a chance with that amount of height.Especially when removing the bucket and lowering the arm was an obvious option in that case.
Seen a head on pic and the digger arm is way above the cab,can’t work out why it’s not a flannery motor on the front though they don’t tend to use subbies. Maybe it was the roadworks mob trying to save a few quid on a site move because it looks like a recovery trailer to me not a proper low loader so maybe not an experienced plant man. Most drivers I know would have had the arm the other way round and the bucket curled further under making the overall height lower