# Relationship history for MSHA mine 1201672

Current hierarchy: **Kurt A  Jones → Jones & Sons Inc → JONES & SONS, INC.**

- 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:** North Knox Materials Inc → JONES & SONS, INC.; 1978-03-09 to 1988-07-10; source msha-controller-operator-history
- **controller_controls_mine:** Dan  Adams → JONES & SONS, INC.; 1978-03-09 to 1988-07-10; source msha-controller-operator-history
- **controller_controls_operator:** Dan  Adams → North Knox Materials Inc; 1978-03-09 to 1988-07-10; source msha-controller-operator-history
- **operator_operates_mine:** Jones & Sons Inc → JONES & SONS, INC.; 1988-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Darrell  Jones → JONES & SONS, INC.; 1988-07-11 to 2014-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Darrell  Jones → Jones & Sons Inc; 1988-07-11 to 2014-03-20; source msha-controller-operator-history
- **controller_controls_mine:** Kurt A  Jones → JONES & SONS, INC.; 2014-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kurt A  Jones → Jones & Sons Inc; 2014-03-21 to current/open; source msha-controller-operator-history