Eastern Magnesia Talc Company Mine, Johnson, Lamoille County, Vermont, USAi

Regional Level Types
Eastern Magnesia Talc Company Mine	Mine
Johnson	Town
Lamoille County	County
Vermont	State
USA	Country

Before the beginning of modern operations by the present owners (Eastern Magnesia Talc Co.), the deposit was worked intermittently and on a rather small scale by several operators. These operations date probably to the early 1900's, possibly earlier. Most of the old workings are now inaccessible, being caved or flooded. The various groups of workings are now designated Mine No. 1, Mine No. 2, Mine No. 3, and Mine No. 4.

Mine No. 1 includes the 1st, 2d, 3d, 4th, 5th, and 6th levels. Levels 1 to 4 were worked from an old shaft, long since caved, located 120 feet east of the so-called Mine No. 1 shaft, now also caved and inaccessible. Levels 1, 2, 3, and 4 were mined entirely by hand methods, and the workings were not extensive. The levels were spaced probably not more than 40 feet apart vertically.

The 5th and 6th levels were mined from Mine No. 1 shaft, near the south end of the ultramafic body. The shaft was inclined about 46° southward. The altitude of the 5th level is 876 feet at the shaft. The workings consist of a system of rooms and pillars over an area 650 feet long north-south and 200 feet wide. These openings are now caved and inaccessible.

The 6th level is at an altitude of 796 feet (mine datum) at the shaft. Workings total about 8000 feet, but only 3500 feet of these at the northern end of the level are now accessible, the southern part of the level being caved and flooded.

Mines No. 2 and 3 were worked by small, vertical shafts not more than 50 feet deep. Both were mined by hand methods, and the workings associated with each were not more than 200 feet in extent. At present, Mine No. 2 is flooded; Mine No. 3 has been broken into by stoping operations from the 200-foot level below.

Mine No. 4 includes the 200-foot level and the 170-foot level the latter a small drift no longer being mined. The 200-foot level is mined from the Mine No. 4 shaft, inclined 45° southward. The designation "200-foot level" refers to the distance in feet·below the collar of the shaft, measured along the incline. The altitude of the 200-foot level is 940 feet at the shaft. The workings total more than 7500 feet. The Mine No. 4 shaft recently has been extended downward to the old 6th level so that mining operations may be resumed on that level.