# Relationship history for MSHA mine 3400052

Current hierarchy: **Spencer Gene  Hopper; Lucas  Hopper → Bison Materials LLC → Bartlesville 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:** Ashland Inc → Bartlesville Quarry; 1950-01-01 to 2006-08-27; source msha-controller-operator-history
- **operator_operates_mine:** Bellco Materials Inc → Bartlesville Quarry; 1950-01-01 to 2007-12-31; source msha-controller-operator-history
- **controller_controls_mine:** James O  Bell → Bartlesville Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James O  Bell → Bellco Materials Inc; 1950-01-01 to 2007-12-31; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Bartlesville Quarry; 2006-08-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** APAC-Oklahoma Inc → Bartlesville Quarry; 2008-01-01 to 2009-12-25; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → APAC-Oklahoma Inc; 2008-01-01 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → APAC-Oklahoma Inc; 2008-01-01 to 2009-12-25; source msha-controller-operator-history
- **controller_controls_mine:** Spencer Gene  Hopper et al → Bartlesville Quarry; 2009-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** APAC-Central, Inc → Bartlesville Quarry; 2009-12-26 to 2020-05-07; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → APAC-Central, Inc; 2009-12-26 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → APAC-Central, Inc; 2009-12-26 to 2020-05-07; source msha-controller-operator-history
- **operator_operates_mine:** Bison Materials LLC → Bartlesville Quarry; 2020-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Spencer Gene  Hopper et al → Bison Materials LLC; 2020-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lucas  Hopper et al → Bison Materials LLC; 2020-05-08 to current/open; source msha-controller-operator-history