# Relationship history for MSHA mine 0404657

Current hierarchy: **Sharp Hubert L-Lance O & Lawrence A → Sharp'S & Son'S → 12 Mile Bar**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Sharp'S & Son'S → 12 Mile Bar; 1983-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sharp Hubert L-Lance O & Lawrence A → 12 Mile Bar; 1983-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sharp Hubert L-Lance O & Lawrence A → Sharp'S & Son'S; 1983-07-01 to current/open; source msha-controller-operator-history