 In every mine the lessee shall provide an escapeway or second means of egress to the surface, which, if a drift, slope, or tunnel exit, shall be separated at the surface from the first exit by not less than 50 feet of rock or coal in place; if either...  Bulletin - Side 221928Uten tilgangsbegrensning - Om denne boken
 | United States. Department of the Interior - 1916 - 104 sider
...underground on any one shift in any separate mine, provide an escape way or second exit to the surface which shall be separated at the surface from the first exit by not less than 50 feet of strata in case of drift, slope, or tunnel workings, or in case of vertical shafts, or of inclined shafts... | |
 | United States. Bureau of Mines - 1921 - 52 sider
...slope, or drift, 5enr<empi°'ye1d an escape way or second means of egress to the surface, on a inut. which in case of drift, slope, or tunnel exits shall...exits are by vertical shaft or by inclined shaft, the exits shall be not less than 200 feet apart. An escape way or outlet through outlet through an... | |
 | United States. Department of the Interior - 1917 - 718 sider
...any one shift in any separate mine, provide an escape way or second exit to the surface which ahall be separated at the surface from the first exit by not less than 50 feet of strata in case of drift, slope, or tunnel workings, or in case of vertical shafts, or of inclined shafts... | |
 | Geological Survey (U.S.) - 1938 - 56 sider
...provide an escapeway or second means of egress to the surface, which, if a drift, slope, or tunnel exit, shall be separated at the surface from the first exit...by not less than 50 feet of rock or coal in place; if either is a shaft or both are shafts, the exits shall be not less than 200 feet apart. (b) During... | |
 | 1939 - 826 sider
...provide an escapeway or second means of egress to the surface, which, if a drift, slope, or tunnel exit, shall be separated at the surface from the first exit...by not less than 50 feet of rock or coal in place ; if either is a shaft or both are shafts, the exits shall be not less than 200 feet apart. (b) Surface... | |
 | United States. Bureau of Mines - 1945 - 1644 sider
...provide an escapeway or second means of egress to the surface, which, if a drift, slope, or tunnel exit, shall be separated at the surface from the first exit...by not less than 50 feet of rock or coal in place; if either is a shaft or both are shafts, the exits shall be not less than 200 feet apart. "During the... | |
 | 1967 - 414 sider
...provide an escapeway or second means of egress to the surface, which, if a drift, slope, or tunnel exit, shall be separated at the surface from the first exit...by not less than 50 feet of rock or coal in place; if either is a shaft or both are shafts, the exits shall be not less than 200 feet apart. (b) Surface... | |
 | 1959 - 664 sider
...provide an escapeway or second means of egress to the surface, which, if a drift, slope, or tunnel exit, shall be separated at the surface from the first exit...by not less than 50 feet of rock or coal in place ; if either is a shaft or both are shafts, the exits shall be not less than 200 feet apart. (b) Surface... | |
 | 1949 - 566 sider
...provide an escapeway or second means of egress to the surface, which, if a drift, slope, or tunnel exit, shall be separated at the surface from the first exit...by not less than 50 feet of rock or coal in place ; if either is a shaft or both are shafts, the exits shall be not less than 200 feet apart. (b) Surface... | |
 | 1969 - 432 sider
...provide an escapeway or second means of egress to the surface, which, if a drift, slope, or tunnel exit, shall be separated at the surface from the first exit...by not less than 50 feet of rock or coal in place; if either is a shaft or both are shafts, the exits shall be not less than 200 feet apart. (b) Surface... | |
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