# Relationship history for MSHA mine 0300907

Current hierarchy: **Randy  Duffield; Larry  Duffield → Souter Construction Company Inc → HOLLYWOOD 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Bill L  Johnston → HOLLYWOOD QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sweet Home Stone Company → HOLLYWOOD QUARRY; 1950-01-01 to 1979-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Markham  Brown → HOLLYWOOD QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Markham  Brown → Sweet Home Stone Company; 1950-01-01 to 1979-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Randy  Duffield et al → HOLLYWOOD QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** W Scott  McGeorge et al → HOLLYWOOD QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pine Bluff Sand & Gravel Company → HOLLYWOOD QUARRY; 1979-08-15 to 1985-07-22; source msha-controller-operator-history
- **controller_controls_operator:** W Scott  McGeorge et al → Pine Bluff Sand & Gravel Company; 1979-08-15 to 1985-07-22; source msha-controller-operator-history
- **operator_operates_mine:** Rock Products Inc → HOLLYWOOD QUARRY; 1985-07-23 to 1994-12-12; source msha-controller-operator-history
- **controller_controls_operator:** Bill L  Johnston → Rock Products Inc; 1985-07-23 to 1994-12-12; source msha-controller-operator-history
- **controller_controls_mine:** Randy  Duffield et al → HOLLYWOOD QUARRY; 1992-05-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** L & R Quarries Inc → HOLLYWOOD QUARRY; 1994-12-13 to 1996-06-02; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Duffield et al → L & R Quarries Inc; 1994-12-13 to 1996-06-02; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Duffield et al → L & R Quarries Inc; 1994-12-13 to 1996-06-02; source msha-controller-operator-history
- **operator_operates_mine:** Pine Bluff Sand & Gravel Company → HOLLYWOOD QUARRY; 1996-06-03 to 1999-07-26; source msha-controller-operator-history
- **controller_controls_operator:** W Scott  McGeorge et al → Pine Bluff Sand & Gravel Company; 1996-06-03 to 1999-07-26; source msha-controller-operator-history
- **operator_operates_mine:** Souter Construction Company Inc → HOLLYWOOD QUARRY; 1999-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Duffield et al → Souter Construction Company Inc; 1999-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Duffield et al → Souter Construction Company Inc; 1999-07-27 to current/open; source msha-controller-operator-history