Here's some information from Piper and Laney's report (see my previous post) that might clarify some of the Sinker tunnel work (bolding added). I think they are going to connect it to the Golden Chariot shaft, which is maybe only 150 feet away. Sounds like they are already dewatering the GC shaft in preparation. Also, sounds like the opening of the GC shaft was caved in, but the rest should be OK. This is probably the source of the reports of a second entrance to the Sinker that was caved in at the opening. It's not a second entrance yet, but will be soon at much less expense ($150k) than has been inaccurately reported in other posts here as costing $12M and taking 2.5 years- numbers that got bigger with almost every post! LOL
The Golden Chariot shaft was sunk in the granite wall rock, striking the vein at the ninth level (29e p. 189), below which it has been sunk about 350 feet. It is probable that this shaft, although caved at the collar, is in good condition for the greater part of its depth, particularly below the water level. Opening and unwatering it sufficiently to permit accurate surveying should not, if the expected condition prevails, be an extremely difficult task and should not be shirked. As has been pointed out already, the base of the shaft and the top of the raise are not much more than 150 feet apart vertically and perhaps even less horizontally, if the available data are at all trustworthy, This program offers the most expeditious and economical solution of the problem. Should this development prove the existence of workable primary ore, the Sinker tunnel should be extended to crosscut the entire vein system to the Poorman, since the maximum of economy and efficiency may be gained by working the system as a unit.