# Relationship history for MSHA mine 0403761

Current hierarchy: **Reed Family Companies → George Reed Inc → Jackson Valley 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:** Reed Family Companies → Jackson Valley Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Greenstone Quarry Inc → Jackson Valley Quarry; 1950-01-01 to 1987-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Robert L  Avery → Jackson Valley Quarry; 1950-01-01 to 1987-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Robert L  Avery → Greenstone Quarry Inc; 1950-01-01 to 1987-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Al Johnson Construction Company → Jackson Valley Quarry; 1984-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Claude C Wood Company → Jackson Valley Quarry; 1988-01-01 to 1993-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Al Johnson Construction Company → Claude C Wood Company; 1988-01-01 to 1993-03-31; source msha-controller-operator-history
- **operator_operates_mine:** George Reed Inc → Jackson Valley Quarry; 1993-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reed Family Companies → George Reed Inc; 1993-04-01 to current/open; source msha-controller-operator-history