# Relationship history for MSHA mine 4003609

Current hierarchy: **Rogers Group Inc → Rogers Group Inc. → Blount-Loudon Quarry**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Rogers Group Inc → Blount-Loudon Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tri-County Crushed Stone → Blount-Loudon Quarry; 2024-06-25 to 2026-09-20; source msha-controller-operator-history
- **controller_controls_mine:** R & P Murphy Land Company LLC et al → Blount-Loudon Quarry; 2024-06-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** R & P Murphy Land Company LLC et al → Tri-County Crushed Stone; 2024-06-25 to 2026-09-20; source msha-controller-operator-history
- **controller_controls_operator:** Malicote MDGC Trust et al → Tri-County Crushed Stone; 2024-06-25 to 2026-09-20; source msha-controller-operator-history
- **operator_operates_mine:** Rogers Group Inc. → Blount-Loudon Quarry; 2026-09-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Group Inc → Rogers Group Inc.; 2026-09-21 to current/open; source msha-controller-operator-history