Replies to post #44807 on North Bay Resources Inc (NBRI)

[nagoya1]

if you visit the nbri website, you'll have many questions answered. NBRI

[meltinglass]

Site inspections conducted during June and July, 2010 by C. Gary Clifton, a certified professional geologist (P.Geo.) retained by the Company as an independent consulting geologist to inspect and assess the Ruby Mine, and by management in September, 2010, confirmed that the Ruby is in excellent condition, and has been well maintained despite having not been operation since 1998. The equipment currently on-site at the Ruby was mostly purchased in the period between 1990 and 1995 when the mine was last in production, and is therefore between 15 and 20 years old. The equipment, including the wash plant and mill facilities, has been confirmed to be in good working order, though some minor upgrades are expected to be needed once operations resume.

The equipment, fixed assets, and infrastructure in place have been valued at an estimated $3.5 million, and include a 1,000 yard per day placer wash plant, 50-ton per day quartz mill, 6,000 feet of tracked haulage, and related support equipment needed for underground mining operations. A second exit, the Lawry Shaft, almost 2 miles from the main portal, can provide natural ventilation for much of the underground workings. Surface buildings and facilities include a lumber mill, machine shops, offices, and accommodations. The property also features an excellent system of roads, is accessible via paved highway from Reno or Sacramento, has abundant water and timber available for mining purposes, and has PG&E power available on-site.

[ryanonthevedder]

Using info from NBRI's website one can get a good idea of what their plans are for the Ruby mine.

The existing infrastructure and permitting status make it possible to start up mining activity almost immediately.

The south end of the mine is accessible by a portal. Electricity is provided by 250 kw and 55 kw diesel generators and compressed air by a 750 cfm diesel compressor. There is a 40 hp. ventilation fan located underground, electric and diesel trammers, and ore cars and flat cars. The site has a shop with an electric overhead hoist on a track and various tools, mill buildings, a 4,500 gallon diesel tank with containment basin under cover, a 1,000 yard-per-day placer gravel recovery plant and a 50 ton hard rock quartz recovery plant.

The mine has rock drills, slushers and tuggers, additional fans and pumps, both air and electric powered, and much miscellaneous equipment, tools, and supplies

Description of Mining Process

(a) Development occurs on the advance by drifting upstream or downstream along the axis of the channel, with crosscuts driven every fifty to one hundred feet. The muck from these workings is slushed to ore passes that lead to the main haulage level within the bedrock below the channels. This production is accompanied by face and rib sampling and by bulk testing of the muck from the development headings. Each round is quantitatively analyzed to map out the grade distribution of the gold. This work is followed by;

(b) Selective mining--termed breasting-- during the retreat, using the drift as the main haulage-way and leaving pillars of sub-ore grade material. This is facilitated by careful mine planning based on the geometry of the channel and the grade distribution ascertained from the development phase.

The mined gravel (muck) is transported from the mine along the tracked haulageway to the mill and dumped into the ore bin directly above the gravity separation washing plant.

Quick video of a slusher in operation:

A close but not exact video of the mine development and operation.

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FYI, this is how they are mining through the Ruby portal at the south end of the claim. The north end via Lawry is a different story.

The Pilot and Mount Vernon Channel targets are projected to lie in the near vicinity of the existing Lawry Shaft workings, so active exploration tunneling ("drifting") with air-powered slushers and trackless loaders ("LHD's")

On the north end, entry to the mine is through the Lawry Shaft which has a steel headframe and a complete hoist house and hoisting facilities for men, ore and materials. There are two LHD's with 1 yd. buckets underground. There is a 40 hp. fan and a secondary ventilation fan with fan line as well as water and compressed air lines and electrical service underground. Electricity in this area is provided by PG&E and a 150 kw diesel generator providing backup power. A 250 cfm electric compressor located on the surface provides compressed air.

Pneumatic LHD in operation:

This should answer any questions and fill any knowledge gaps regarding operations underway at the Ruby mine.

[Spanky227]

All equipment is there and has been verified by an expert to be in working condition. Not saying there will obviously be some start up gremlins but nothing major.