# Relationship history for MSHA mine 4406818

Current hierarchy: **Lhoist Group → Chemical Lime Company Of Virginia Inc → KIMBALLTON PLT #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

- **controller_controls_mine:** A P Green Industries Inc → KIMBALLTON PLT #2; 1988-02-24 to 1998-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Margaret J  Heckman  et al → KIMBALLTON PLT #2; 1992-07-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Eastern Ridge Lime Company L P → KIMBALLTON PLT #2; 1995-11-01 to 1996-12-30; source msha-controller-operator-history
- **controller_controls_operator:** Margaret J  Heckman  et al → Eastern Ridge Lime Company L P; 1995-11-01 to 1996-12-30; source msha-controller-operator-history
- **operator_operates_mine:** Apg Lime Corp → KIMBALLTON PLT #2; 1996-12-31 to 1998-06-30; source msha-controller-operator-history
- **controller_controls_operator:** A P Green Industries Inc → Apg Lime Corp; 1996-12-31 to 1998-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Apg Lime Corp → KIMBALLTON PLT #2; 1998-07-01 to 1999-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Global Industrial Technologies Inc → KIMBALLTON PLT #2; 1998-07-01 to 1999-05-03; source msha-controller-operator-history
- **controller_controls_operator:** Global Industrial Technologies Inc → Apg Lime Corp; 1998-07-01 to 1999-05-03; source msha-controller-operator-history
- **operator_operates_mine:** Chemical Lime Company Of Virginia Inc → KIMBALLTON PLT #2; 1999-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lhoist Group → KIMBALLTON PLT #2; 1999-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lhoist Group → Chemical Lime Company Of Virginia Inc; 1999-05-04 to current/open; source msha-controller-operator-history