# Relationship history for MSHA mine 4606437

Current hierarchy: **Kay  Osborne → Extra Trucking Inc → Lamar Surface Mine**

- 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:** Maupin Harry → Lamar Surface Mine; 1981-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Edward Leigh Philpott → Lamar Surface Mine; 1981-11-01 to 1982-06-16; source msha-controller-operator-history
- **controller_controls_mine:** Philpott Edward Leigh → Lamar Surface Mine; 1981-11-01 to 1982-06-16; source msha-controller-operator-history
- **controller_controls_operator:** Philpott Edward Leigh → Edward Leigh Philpott; 1981-11-01 to 1982-06-16; source msha-controller-operator-history
- **operator_operates_mine:** Aqua Processing Inc → Lamar Surface Mine; 1982-06-17 to 1984-04-15; source msha-controller-operator-history
- **controller_controls_operator:** Maupin Harry → Aqua Processing Inc; 1982-06-17 to 1984-04-15; source msha-controller-operator-history
- **operator_operates_mine:** Tuckmar Corp → Lamar Surface Mine; 1984-04-16 to 1986-11-17; source msha-controller-operator-history
- **controller_controls_mine:** Fisher Gregory → Lamar Surface Mine; 1984-04-16 to 1986-11-17; source msha-controller-operator-history
- **controller_controls_operator:** Fisher Gregory → Tuckmar Corp; 1984-04-16 to 1986-11-17; source msha-controller-operator-history
- **operator_operates_mine:** Monarch Coal Sales → Lamar Surface Mine; 1986-11-18 to 1993-01-01; source msha-controller-operator-history
- **controller_controls_mine:** Rupe Jesse L → Lamar Surface Mine; 1986-11-18 to 1993-01-01; source msha-controller-operator-history
- **controller_controls_operator:** Rupe Jesse L → Monarch Coal Sales; 1986-11-18 to 1993-01-01; source msha-controller-operator-history
- **operator_operates_mine:** Covel Coal Company → Lamar Surface Mine; 1993-01-02 to 1996-09-23; source msha-controller-operator-history
- **controller_controls_mine:** Crack Frederick G → Lamar Surface Mine; 1993-01-02 to 1996-09-23; source msha-controller-operator-history
- **controller_controls_operator:** Crack Frederick G → Covel Coal Company; 1993-01-02 to 1996-09-23; source msha-controller-operator-history
- **operator_operates_mine:** Bygoma Energy Llc → Lamar Surface Mine; 1996-09-24 to 2001-04-10; source msha-controller-operator-history
- **controller_controls_mine:** Norman B  Mullins → Lamar Surface Mine; 1996-09-24 to 2001-04-10; source msha-controller-operator-history
- **controller_controls_operator:** Norman B  Mullins → Bygoma Energy Llc; 1996-09-24 to 2001-04-10; source msha-controller-operator-history
- **operator_operates_mine:** Extra Trucking Inc → Lamar Surface Mine; 2001-04-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kay  Osborne → Lamar Surface Mine; 2001-04-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kay  Osborne → Extra Trucking Inc; 2001-04-11 to current/open; source msha-controller-operator-history