I have been down to Oldbury at lunchtime to have a look at what has gone on. It appears that only half (roughly one boat length) now remains of the wharf, the covered section has gone. Infill is visible at the end, but Holloway's have parked trailers on it to disguise it. The whole scene looks very intimidating to anyone mooring there with lorrys parked as near as possible to the boats. A sad sight indeed.
There did seem some discolouration in the water which probably is the deposit from the arm. Some boats showing a white line at the waterline which could well be disturbed phosphorus waste from the bottom. In view of this I called the enviroment agency and logged the issue, at least three other people have done the same. There is a real danger of pollution here as this stretch of canal was heavily polluted for years coutesy of Albright and Wilson and a few others. BW also informed at senior level.
Environment Agency Emergency Hotline 0800 80 70 60