# Relationship history for MSHA mine 2103100

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

- 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:** David  Ferrell → PORTABLE CRUSHER; 1991-06-26 to 2014-03-05; source msha-controller-operator-history
- **operator_operates_mine:** Annandale Rock Products Inc → PORTABLE CRUSHER; 1995-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Ferrell → Annandale Rock Products Inc; 1995-04-01 to 2014-03-05; source msha-controller-operator-history
- **controller_controls_mine:** Jonathan  Ferrell et al → PORTABLE CRUSHER; 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