# Relationship history for MSHA mine 4603286

Current hierarchy: **Tracy W  Hylton II → Upper Laurel Company → Jbm Peerless Tipple (2)**

- 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:** J B & M Coal Company → Jbm Peerless Tipple (2); 1950-01-01 to 1973-06-30; source msha-controller-operator-history
- **controller_controls_mine:** J B & M Coal Company → Jbm Peerless Tipple (2); 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J B & M Coal Company → J B & M Coal Company; 1950-01-01 to 1973-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Peerless Sales Inc → Jbm Peerless Tipple (2); 1973-07-01 to 1988-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Klaproth Abner H → Jbm Peerless Tipple (2); 1973-07-01 to 1988-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Klaproth Abner H → Peerless Sales Inc; 1973-07-01 to 1988-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Tracy W  Hylton II → Jbm Peerless Tipple (2); 1988-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & S Contracting Inc → Jbm Peerless Tipple (2); 1988-12-01 to 1989-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Cline Robert L → Jbm Peerless Tipple (2); 1988-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cline Robert L → B & S Contracting Inc; 1988-12-01 to 1989-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Upper Laurel Company → Jbm Peerless Tipple (2); 1989-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tracy W  Hylton II → Upper Laurel Company; 1989-09-15 to current/open; source msha-controller-operator-history