The pothole developed earlier in the week. It grew larger and larger until it was 40 cm across - certainly big enough to grab the tire of a smaller vehicle. But not only did it grow larger, it grew deeper to the point where there was no bottom and you could see the river below... We stuck a plank over top of it until the repair crew were due to arrive and stationed someone at the bridge to warn motorists to take it extra slow.
The bridge was re-opened to traffic around 1:30 p.m. while the crew continued working, applying concrete cement to the underside of the bridgehead foundation where there was a large hole.
Thanks to Werner & the rest of the guys at Dada Civils for the emergency repair. It was a hot day, too.
Incidentally, the wooden surface of the bridge is expected to undergo refurbishment some time in February - and it will be once again closed to traffic at that time. I'll post more details here once they're known.