I don't have anyexperience in ID, but for starters, a boom is usually used to contain surface contamiments such as oil. It won't do anything for suspended sediments which will usually disperse within a couple hundred feet or so.
Next up is getting a POO/NOI done. There are some of those that have been in process for years with USFS, and I doubt you can get one through in time for this summer. First thing to do is contact the USFS and ask what the cost of one is. They are starting to have the applicant pay the costs of getting it done in some areas. Same thing with the EPA and state. As to claim owners, you would have to go to the mining claim number and find the owner of record either off the claim paperwork or the county recorder and contact for said letter
They have put up enough hoops and blocks to make it virtually impossible to do what you want. It is apparently done in cahoots with the environmental lobby to get us out of the water, as is being done in other states out here now.