Don't think it has not been attempted over the years. The dynamiting changed the structure such that there is a blowing flow emerging from a small slit. Attempts to dig out the entrance are typically met with the flow filling it back in. The only way this will ever be accomplished will be with a full fledged dredging operation to suck it clean faster than the flow can react to defeat the effort. I have seen some huge piles of gravel and large rocks removed over the course of days, and then looked at the results to see no change in the opening.
It would be nice to see it opened up once again, but I seriously doubt it will ever happen. Morrison was a beautiful cave before the sheriff dynamited it closed to "stop that cave from killing any more cave divers". It is quite deep, which is what generated most of the deaths (diving a cave beyond 200ft on air is not safe, but it is how things were being done back then.)
Might be worthwhile putting your point forward to a higher authority. Tell them its not just a hole in the ground with water in it, its part of a much bigger system since it has a lot of flow and that the flow rate is important. Maybe if you get enough people behind it the government will put the needed funds into it. It might be wishful thinking but its dead in the water if no one asks in the first place. Put it to them as more than just a dive site. Dont even mention that it may help. Get geologists and water management people on board to give it credability. If it all ends with only 2 divers being able to dive it one weekend a month then thats 2 more than are doing it now.
Matt
Telford Spring because it has everything, sinks with light coming down, all different styles, its as long as you want to go, and its free
I think Indian has to be on top of my list. The giant breakdown piles and the huge "car size" chunks of gerthite on the ceiling just hanging there against the white walls...very pretty. I really like anything in the panhandle. =)