# Relationship history for MSHA mine 4406343

Current hierarchy: **Adams Construction Company → Adams Construction Company → Adams Construction Company**

- 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

- **controller_controls_mine:** C W  Lawhorne et al → Adams Construction Company; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adams Construction Company → Adams Construction Company; 1983-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lawhorne Brothers Inc → Adams Construction Company; 1986-11-01 to 2007-06-03; source msha-controller-operator-history
- **controller_controls_operator:** C W  Lawhorne et al → Lawhorne Brothers Inc; 1986-11-01 to 2007-06-03; source msha-controller-operator-history
- **operator_operates_mine:** Adams Construction Company → Adams Construction Company; 2007-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adams Construction Company → Adams Construction Company; 2007-06-04 to current/open; source msha-controller-operator-history