# Relationship history for MSHA mine 4502665

Current hierarchy: **James  Burnett; Lawrence P.  Hughes → Iron Mountain Quarry → Granite Falls 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

- **operator_operates_mine:** Builders Rock Inc → Granite Falls Quarry; 1979-01-01 to 1985-06-28; source msha-controller-operator-history
- **controller_controls_mine:** Jerry  Morey → Granite Falls Quarry; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Morey → Builders Rock Inc; 1979-01-01 to 1985-06-28; source msha-controller-operator-history
- **controller_controls_mine:** Burlington Resources Inc → Granite Falls Quarry; 1981-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Meridian Aggregates Company → Granite Falls Quarry; 1985-06-29 to 1991-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Burlington Resources Inc → Meridian Aggregates Company; 1985-06-29 to 1991-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Lawrence P.  Hughes et al → Granite Falls Quarry; 1988-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Meridian Aggregates Company → Granite Falls Quarry; 1991-03-01 to 2001-04-09; source msha-controller-operator-history
- **controller_controls_mine:** Meridian Aggregates Company LP → Granite Falls Quarry; 1991-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Meridian Aggregates Company LP → Meridian Aggregates Company; 1991-03-01 to 2001-04-09; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → Granite Falls Quarry; 2001-04-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Meridian Aggregates Company LP → Granite Falls Quarry; 2001-04-10 to 2004-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Meridian Aggregates Company LP; 2001-04-10 to 2004-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Iron Mountain Quarry → Granite Falls Quarry; 2004-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence P.  Hughes et al → Iron Mountain Quarry; 2004-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Burnett et al → Iron Mountain Quarry; 2004-10-01 to current/open; source msha-controller-operator-history