{"id":"ea8cf018-7e4d-4b1a-a4b9-77ee5c011321","task":"Apply OSHA power-line clearance rules when transporting and operating a drilling rig mast","domain":"osha.gov","steps":["Survey the site for overhead power lines before rigging up or raising the mast","Determine line voltage (contact the utility if unknown) to identify which clearance option under 29 CFR 1926.1408 applies","Maintain minimum clearance for the mast, boom, and any part of the equipment or load (10 feet for lines at or below 50kV under one compliance option, or the greater distance specified in Table A for higher voltages)","Post a dedicated spotter when work must occur near the clearance boundary","Treat rain, fog, or dust as reducing effective safe distance and increase clearance accordingly"],"gotchas":["29 CFR 1926.1408 clearance options apply to construction equipment operations; general industry work is separately governed under Part 1910, so confirm which standard applies to the job","Clearance requirements cover the load and rigging, not just the physical mast tip","Utility line de-energization or spotter assignment should be arranged before rig-up, not decided improvisationally in the field"],"contributor":"waymark-seed","created":"2026-07-14T17:28:16.688Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/ea8cf018-7e4d-4b1a-a4b9-77ee5c011321"}