# Relationship history for MSHA mine 2101257

Current hierarchy: **Timothy  Ferrell; Sue  Ferrell; Jonathan  Ferrell → Annandale Rock Products Inc → Annandale Rock Products**

- 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:** Conrock Materials Inc → Annandale Rock Products; 1950-01-01 to 1978-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Conrock Materials Inc → Annandale Rock Products; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Conrock Materials Inc → Conrock Materials Inc; 1950-01-01 to 1978-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Minnesota Rock Inc → Annandale Rock Products; 1978-10-01 to 1991-06-25; source msha-controller-operator-history
- **controller_controls_mine:** Bernard  Munsterteiger → Annandale Rock Products; 1978-10-01 to 1991-06-25; source msha-controller-operator-history
- **controller_controls_operator:** Bernard  Munsterteiger → Minnesota Rock Inc; 1978-10-01 to 1991-06-25; source msha-controller-operator-history
- **operator_operates_mine:** Annandale Rock Products Inc → Annandale Rock Products; 1991-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David  Ferrell → Annandale Rock Products; 1991-06-26 to 2014-03-05; source msha-controller-operator-history
- **controller_controls_operator:** David  Ferrell → Annandale Rock Products Inc; 1991-06-26 to 2014-03-05; source msha-controller-operator-history
- **controller_controls_mine:** Jonathan  Ferrell et al → Annandale Rock Products; 2014-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jonathan  Ferrell et al → Annandale Rock Products Inc; 2014-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy  Ferrell et al → Annandale Rock Products Inc; 2014-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sue  Ferrell et al → Annandale Rock Products Inc; 2014-03-06 to current/open; source msha-controller-operator-history