# Relationship history for MSHA mine 0600537

Current hierarchy: **Leon  Sekulski; Robert  Sekulski → Bakerville Lumber & Construction Inc → BAKERVILLE LUMBER & CONST., INC.**

- 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:** Bakerville Lumber & Construction Inc → BAKERVILLE LUMBER & CONST., INC.; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Sekulski  et al → BAKERVILLE LUMBER & CONST., INC.; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Sekulski  et al → Bakerville Lumber & Construction Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leon  Sekulski  et al → Bakerville Lumber & Construction Inc; 1950-01-01 to current/open; source msha-controller-operator-history