#	Federal Register
1	07/01/2025 - 1926.800 - 90:28366-28370 - Construction Illumination
2	05/08/2024 - 1926.800 - 89:38919-38920 - Underground Construction Standard; Extension of the Office of Management and Budget's (OMB) Approval of Information Collection (Paperwork) Requirements - PDF
3	05/08/2024 - 1926.800, 1926.800(b)(3), 1926.800(j), 1926.800(j)(1)(ii)(A), 1926.800(j)(1)(iii)(A), 1926.800(j)(1)(iii)(B), 1926.800(j)(1)(iii)(C), 1926.800(j)(1)(iii)(D), 1926.800(j)(1)(iv), 1926.800(t)(1)(iv)(B), 1926.800(j)(1)(v)(A), 1926.800(j)(1)(v)(B), 1926.800(j)(1)(vi)(A), 1926.800(j)(2)(i), 1926.800(j)(2)(v), 1926.800(i)(3), 1926.800(m)(2)(ii), 1926.800(o)(2), 1926.800(q)(11) - 89:38919-38920 - Underground Construction Standard; Extension of the Office of Management and Budget's (OMB) Approval of Information Collection (Paperwork) Requirements - PDF
4	04/13/2022 - 1926.800 - 87:21926-21928 - Agency Information Collection Activities: Announcement of the Office of Management and Budget (OMB) Control Numbers Under the Paperwork Reduction Act - PDF
5	07/30/2020 - 1926.800 - 85:45929-45930 - Underground Construction Standard; Extension of the Office of Management and Budget's (OMB) Approval of Information Collection (Paperwork) Requirements - PDF
6	06/20/2017 - 1926.800 - 82:28098-28099 - Underground Construction Standard Extension of the Office of Management and Budget's (OMB) Approval of Information Collection (Paperwork) Requirements - PDF
7	05/04/2015 - 1926.800 - 80:25365-25526 - Confined Spaces in Construction; Final Rule - PDF
8	03/17/2015 - 1926.800 - 80:13893-13894 - Agency Information Collection Activities: Announcement of the Office of Management and Budget (OMB) Control Numbers Under the Paperwork Reduction Act - PDF
9	07/22/2014 - 1926.800 - 79:42537-42538 - Agency Information Collection Activities; Submission for OMB Review; Comment Request; Underground Construction Standard - PDF
10	04/07/2014 - 1926.800 - 79:19125-19127 - Underground Construction Standard; Extension of the Office of Management and Budget's (OMB) Approval of Information Collection (Paperwork) Requirements - PDF
11	02/25/2011 - 1926.800 - 76:8782-8784 - Underground Construction Standard; Extension of the Office of Management and Budget's (OMB) Approval of Information Collection (Paperwork) Requirements - PDF
12	04/28/2010 - 1926.800 - 75:22424-22431 - Avalotis Corp.; Grant of a Permanent Variance - PDF
13	03/11/2008 - 1926.800 - 73:13011-13012 - Submission for OMB Review: Comment Request - PDF
14	12/14/2007 - 1926.800 - 72:71161-71162 - Underground Construction Standard; Extension of the Office of Management and Budget's (OMB) Approval of Information Collection (Paperwork) Requirements - PDF
15	03/04/2005 - 1926.800 - 70:10686-10687 - Submission for OMB Review: Comment Request - PDF
16	12/14/2004 - 1926.800 - 69:74539-74541 - Underground Construction Standard; Extension of the Office of Management and Budget's (OMB) Approval of Information Collection (Paperwork) Requirements - PDF
17	08/30/2001 - 1926.800 - 66:45868-45870 - Underground Construction Standard; Extension of the Office of Management and Budget's (OMB) Approval of Information-Collection (Paperwork) Requirements - PDF
18	04/16/1999 - 1926.800 - 64:18809-18810 - Office of Management and Budget Control Numbers Under the Paperwork Reduction Act for Miscellaneous Construction Industry Rules. - PDF
19	09/04/1998 - 1926.800 - 63:47323-47324 - Submission for OMB Review; Comment Request. - PDF
20	06/19/1998 - 1926.800 - 63:33713-33714 - Underground Construction -- Air Quality Record. - PDF
21	06/02/1989 - 1926.800 - 54:23824-57 - Underground Construction
22	04/17/1987 - 1926.800 - 52:12629-32 - Variance
23	08/19/1985 - 1926.800 - 50:33357-9 - Underground Construction
24	12/19/1983 - 1926.800 - 48:56087 - Tunnels and Shafts
25	08/05/1983 - 1926.800 - 48:35774-818 - Underground Construction
26	03/18/1974 - 1926.800 - 39:10216-23 - Tunnels and Shafts

#	Regulations
1	11/08/2010 - 1926.800 - Underground Construction

#	Letters of Interpretation
1	11/27/2013 - 1926.800(t)(1)(vii) - Regarding the type of hook that is permitted when a crane is used to hoist personnel during underground construction work
2	10/01/2010 - 1926.800(a)(1) - Applicablity of Subpart S to tunnels contructed by auger boring.
3	10/01/2010 - 1926.800, 1926.800(a)(1) - Applicablity of Subpart S to tunnels contructed by auger boring.
4	07/16/2008 - 1926.800(s)(3) - Oil-filled transformers and underground construction.
5	11/29/2002 - 1926.800(r)(13)(ii) - Typographical error in internet text of 1926.800(r)(13)(ii).
6	11/29/2002 - 1926.800, 1926.800(r)(13)(ii) - Typographical error in internet text of 1926.800(r)(13)(ii).
7	08/08/2002 - 1926.800(d) - Request for an interpretation regarding the applicability of 1926.800 to the Fort Point Channel Crossing Immersed Tube. Tunnel.
8	08/08/2002 - 1926.800(k)(4) - Request for an interpretation regarding the applicability of 1926.800 to the Fort Point Channel Crossing Immersed Tube. Tunnel.
9	08/08/2002 - 1926.800(a)(1) - Request for an interpretation regarding the applicability of 1926.800 to the Fort Point Channel Crossing Immersed Tube. Tunnel.
10	08/08/2002 - 1926.800, 1926.800(a)(1), 1926.800(k)(4), 1926.800(d) - Request for an interpretation regarding the applicability of 1926.800 to the Fort Point Channel Crossing Immersed Tube. Tunnel.
11	05/23/2001 - 1926.800 - Construction standards for equipment such as Shuttle Buggy.
12	05/03/2001 - 1926.800(f)(1) - Application of 1926.800 to lone employees working underground in a tunnel or shaft connected to a tunnel.
13	05/03/2001 - 1926.800(e) - Application of 1926.800 to lone employees working underground in a tunnel or shaft connected to a tunnel.
14	05/03/2001 - 1926.800(g)(2) - Application of 1926.800 to lone employees working underground in a tunnel or shaft connected to a tunnel.
15	05/03/2001 - 1926.800(a) - Application of 1926.800 to lone employees working underground in a tunnel or shaft connected to a tunnel.
16	05/03/2001 - 1926.800(f)(5) - Application of 1926.800 to lone employees working underground in a tunnel or shaft connected to a tunnel.
17	05/03/2001 - 1926.800(c) - Application of 1926.800 to lone employees working underground in a tunnel or shaft connected to a tunnel.
18	05/03/2001 - 1926.800, 1926.800(c), 1926.800(f)(5), 1926.800(a), 1926.800(g)(2), 1926.800(e), 1926.800(f)(1) - Application of 1926.800 to lone employees working underground in a tunnel or shaft connected to a tunnel.
19	11/03/2000 - 1926.800 - Application of the Confined Spaces Advisor to construction; personal fall arrest system requirements.
20	03/13/2000 - 1926.800(l)(2) - Tunnel illumination requirements.
21	03/13/2000 - 1926.800(g)(4) - Tunnel illumination requirements.
22	05/28/1998 - 1926.800 - Numerous clarifications regarding underground construction;variances; joint ventures.
23	01/10/1997 - 1926.800(m)(5) - Use of gasoline in underground construction.
24	03/15/1996 - 1926.800 - Fire prevention and protection requirements applicable to underground construction.
25	08/08/1994 - 1926.800 - Wedge Sockets Wire Rope Clips (Piggy-Back Clip).
26	07/26/1994 - 1926.800 - Wire rope clips in conjunction with wedge sockets.
27	12/09/1993 - 1926.800(s) - Tunnel boring machine equipment.
28	07/24/1993 - 1926.800 - Definition of Potentially Gassy Atmosphere.
29	08/19/1992 - 1926.800 - Cage, skip and load connections to hoist ropes.
30	05/20/1992 - 1926.800 - Use of liquefied petroleum gas (LPG) underground.
31	05/05/1992 - 1926.800 - Transportation of compressed gas chambers
32	07/08/1991 - 1926.800(s)(1) - Protection of flexible cords when hung in tunnel shafts.
33	03/27/1991 - 1926.800(h) - Clarification of approval requirements for equipment to classify underground construction operations as potentially gassy
34	03/06/1991 - 1926.800(g)(5) - A rescue team is required during all phases of underground construction operations in a tunnel.
35	01/29/1991 - 1926.800 - Rehabilitation of a sewer tunnel constructed in the years between 1926 and 1932
36	09/23/1980 - 1926.800 - Cut and cover construction.
37	03/21/1980 - 1926.800(h)(2)(iii) - Interpretation on testing requirements for grouted tunnel rock bolts
38	02/17/1978 - 1926.800 - Safety aspects of personnel and material hoists.
39	01/31/1978 - 1926.800(k)(10)(i) - Cut-and-cover operation in the construction of tunnels.
40	11/16/1977 - 1926.800(c) - Positive identification of persons working underground in tunnels and shafts, caissons, cofferdams, compressed air tunnels.
41	07/19/1976 - 1926.800 - Cut-and-cover operation regulations of Excavation, Trenching, and Shoring.
42	04/19/1976 - 1926.800(c) - Use of Mapp gas, oxygen, and acetylene in a tunnel.
43	04/16/1976 - 1926.800 - Methylacetylene-propadiene, stabilized, by definition, is not a liquefied petroleum gas, but is considered as a fuel gas
44	04/15/1976 - 1926.800 - The handling, Storing and Use of MAPP Gas in Underground Construction Work.
45	11/11/1975 - 1926.800(k)(2) - Supplied air and ventilating air requirements.
46	07/07/1975 - 1926.800 - Clarification of 29 CFR 1926.350(b)(4) to Permit Cylinders Containing Oxygen, Acetylene or Other Fuel Gas to be Taken into Tunnels
47	04/30/1975 - 1926.800 - Cut and cover tunneling operations.