# Relationship history for MSHA mine 4605976

Current hierarchy: **Dixon Gary → Builders Inc → Lobby #4**

- 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:** New Coals Of Wv Inc → Lobby #4; 1979-04-01 to 1988-06-21; source msha-controller-operator-history
- **controller_controls_mine:** Lobb Thomas E → Lobby #4; 1979-04-01 to 1988-06-21; source msha-controller-operator-history
- **controller_controls_operator:** Lobb Thomas E → New Coals Of Wv Inc; 1979-04-01 to 1988-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Builders Inc → Lobby #4; 1988-06-22 to 1988-12-06; source msha-controller-operator-history
- **controller_controls_mine:** Gibson Roy → Lobby #4; 1988-06-22 to 1988-12-06; source msha-controller-operator-history
- **controller_controls_operator:** Gibson Roy → Builders Inc; 1988-06-22 to 1988-12-06; source msha-controller-operator-history
- **operator_operates_mine:** Rebecca Fuels Inc → Lobby #4; 1988-12-07 to 1989-01-29; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Harvey → Lobby #4; 1988-12-07 to 1989-01-29; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Harvey → Rebecca Fuels Inc; 1988-12-07 to 1989-01-29; source msha-controller-operator-history
- **operator_operates_mine:** Builders Inc → Lobby #4; 1989-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dixon Gary → Lobby #4; 1989-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dixon Gary → Builders Inc; 1989-01-30 to current/open; source msha-controller-operator-history