# Relationship history for MSHA mine 4502667

Current hierarchy: **Mike (Kenneth)  Wood → Wood & Son - K&M Quarries → Wood & Son - K&M Quarries**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Jones Company → Wood & Son - K&M Quarries; 1979-01-01 to 1981-02-05; source msha-controller-operator-history
- **controller_controls_mine:** Estate of William Jones → Wood & Son - K&M Quarries; 1979-01-01 to 1981-02-05; source msha-controller-operator-history
- **controller_controls_operator:** Estate of William Jones → Jones Company; 1979-01-01 to 1981-02-05; source msha-controller-operator-history
- **operator_operates_mine:** Jones Quarry Associates → Wood & Son - K&M Quarries; 1981-02-06 to 1983-01-11; source msha-controller-operator-history
- **controller_controls_mine:** Marvin  Jamerson et al → Wood & Son - K&M Quarries; 1981-02-06 to 1983-01-11; source msha-controller-operator-history
- **controller_controls_operator:** Marvin  Jamerson et al → Jones Quarry Associates; 1981-02-06 to 1983-01-11; source msha-controller-operator-history
- **operator_operates_mine:** Jones Quarry Inc → Wood & Son - K&M Quarries; 1983-01-12 to 2008-05-30; source msha-controller-operator-history
- **controller_controls_mine:** Estate of William Jones → Wood & Son - K&M Quarries; 1983-01-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Estate of William Jones → Jones Quarry Inc; 1983-01-12 to 2008-05-30; source msha-controller-operator-history
- **operator_operates_mine:** Wood & Son - K&M Quarries → Wood & Son - K&M Quarries; 2008-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mike (Kenneth)  Wood → Wood & Son - K&M Quarries; 2008-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike (Kenneth)  Wood → Wood & Son - K&M Quarries; 2008-05-31 to current/open; source msha-controller-operator-history