Of course ice formed in the dome. The flow was restricted. The outlet is too small. They need a large diameter pipe. It should not be sealed at the bottom. That way the water can settle out and work can go on below the opening. The Remote Operated Vehicles (ROV) can maintain its position until it can be anchored. The right design is more like a chimney. It can withstand changes in pressure. I don't know the volume or pressure of the hydrocarbon flow, but PP does. 12 inch pipe is readily available. That is a good starting point. I've emailed them. Please, if you are with the press or government, make BP realize this.
This is a call for information.
If the company is overwhelmed by submissions of duplicate ideas, perhaps someone or organization who can be available around the clock can provide a forum to on which the public's suggestions can be merged
Let's stop this spill and help as many of the animals as we can and save fault finding for a later date, please.