# Relationship history for MSHA mine 3300143

Current hierarchy: **Brent  Gerken; Michael J  Gerken → Custar Stone Company → Custar Stone Company**

- 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:** France Stone Company → Custar Stone Company; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pugh Quarry Company → Custar Stone Company; 1950-01-01 to 1979-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Vern N  Miller → Custar Stone Company; 1950-01-01 to 1979-05-15; source msha-controller-operator-history
- **controller_controls_operator:** Vern N  Miller → Pugh Quarry Company; 1950-01-01 to 1979-05-15; source msha-controller-operator-history
- **operator_operates_mine:** France Stone Company → Custar Stone Company; 1979-05-16 to 1986-09-30; source msha-controller-operator-history
- **controller_controls_operator:** France Stone Company → France Stone Company; 1979-05-16 to 1986-09-30; source msha-controller-operator-history
- **operator_operates_mine:** France Stone Company → Custar Stone Company; 1986-10-01 to 1988-11-13; source msha-controller-operator-history
- **controller_controls_mine:** Koppers Company Inc → Custar Stone Company; 1986-10-01 to 1988-11-13; source msha-controller-operator-history
- **controller_controls_operator:** Koppers Company Inc → France Stone Company; 1986-10-01 to 1988-11-13; source msha-controller-operator-history
- **operator_operates_mine:** France Stone Company → Custar Stone Company; 1988-11-14 to 1995-05-04; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Custar Stone Company; 1988-11-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → France Stone Company; 1988-11-14 to 1995-05-04; source msha-controller-operator-history
- **operator_operates_mine:** Custar Stone Company → Custar Stone Company; 1995-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brent  Gerken et al → Custar Stone Company; 1995-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brent  Gerken et al → Custar Stone Company; 1995-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael J  Gerken et al → Custar Stone Company; 1995-05-05 to current/open; source msha-controller-operator-history