# Relationship history for MSHA mine 2400482

Current hierarchy: **Meridian Aggregates Company LP → Meridian Aggregates Company → Mc Quarrie 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:** Janney Construction Company Inc → Mc Quarrie Quarry; 1950-01-01 to 1987-04-09; source msha-controller-operator-history
- **controller_controls_mine:** Janney Ed → Mc Quarrie Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Janney Ed → Janney Construction Company Inc; 1950-01-01 to 1987-04-09; source msha-controller-operator-history
- **controller_controls_mine:** James W  Weaver et al → Mc Quarrie Quarry; 1986-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Weaver Stone Products Company → Mc Quarrie Quarry; 1987-04-10 to 1993-02-28; source msha-controller-operator-history
- **controller_controls_operator:** James W  Weaver et al → Weaver Stone Products Company; 1987-04-10 to 1993-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Meridian Aggregates Company LP → Mc Quarrie Quarry; 1991-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Meridian Aggregates Company → Mc Quarrie Quarry; 1993-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Meridian Aggregates Company LP → Meridian Aggregates Company; 1993-03-01 to current/open; source msha-controller-operator-history