Editorial Note on Part 75
Editorial Note: The provisions of this part marked [Statutory Provision] appear in Title III of the Federal Coal Mine Health and Safety Act of 1969.

§ 75.1714-4 Additional self-contained self-rescuers (SCSRs). ( a ) *Additional SCSRs in work places.* In addition to the requirements in §§ 75.1714, 75.1714-1, 75.1714-2, and 75.1714-3 of this part, the mine operator shall provide the following: ( 1 ) At least one additional SCSR, which provides protection for a period of one hour or longer, for each person at a fixed underground work location.
( 2 ) Additional SCSRs along the normal travel routes for pumpers, examiners, and other persons who do not have a fixed work location to be stored at a distance an average miner could walk in 30 minutes. The SCSR storage locations shall be determined by using one of the methods found under paragraph (c)(2) of this section.
( b ) *Additional SCSRs on mantrips.* If a mantrip or mobile equipment is used to enter or exit the mine, at least one additional SCSR, which provides protection for a period of one hour or longer, shall be available for each person who uses such transportation from portal to portal.
( c ) *Additional SCSRs in escapeways.* When each person underground cannot safely evacuate the mine within 30 minutes, the mine operator shall provide additional SCSRs stored in each required escapeway. ( 1 ) Each storage location shall contain at least one SCSR, which provides protection for a period of one hour or longer, for every person who will be inby that location.
( 2 ) Storage locations shall be spaced along each escapeway at 30-minute travel distances no greater than the distances determined by— ( i ) Calculating the distance an average miner walks in 30 minutes by using the time necessary for each miner in a sample of typical miners to walk a typical length of each escapeway; or
( ii ) Using the SCSR storage location spacing specified in the following table, except for escapeways with grades over 5 percent. Average entry height
Maximum distancebetween SCSR storage locations (in ft.) <40 in. (Crawl)
2,200 >40-<50 in. (Duck Walk)
3,300 >50-<65 in. (Walk Head Bent)
4,400 >65 in. (Walk Erect)
5,700
( d ) *Additional SCSRs in hardened rooms.* As an alternative to providing SCSR storage locations in each escapeway, the mine operator may store SCSRs in a hardened room located between adjacent escapeways. ( 1 ) The hardened room shall be designed and constructed to the same explosion force criteria as seals.
( 2 ) The hardened room shall include a means to provide independent, positive pressure ventilation from the surface during an emergency.
( 3 ) The District Manager shall approve the design and construction of hardened rooms in the ventilation plan.
( 4 ) These SCSR storage locations shall be spaced in accordance with paragraph (c) of this section.
( e ) *Storage location accessibility.* All SCSRs required under this section shall be stored according to the manufacturers' instructions, in conspicuous locations readily accessible by each person in the mine.
( f ) *Storage location signs.* A sign made of reflective material with the words “SCSRs” or “SELF-RESCUERS” shall be conspicuously posted at each storage location. Direction signs made of a reflective material shall be posted leading to each storage location.
[71 FR 71454, Dec. 8, 2006]