# Relationship history for MSHA mine 3503473

Current hierarchy: **Sam  Jeffries; Jim  Jeffries → All Rock LLC → ALL ROCK**

- 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:** All Rock → ALL ROCK; 1999-02-01 to 2013-03-11; source msha-controller-operator-history
- **controller_controls_mine:** Sam  Jeffries  et al → ALL ROCK; 1999-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sam  Jeffries  et al → All Rock; 1999-02-01 to 2013-03-11; source msha-controller-operator-history
- **controller_controls_operator:** Jim  Jeffries  et al → All Rock; 1999-02-01 to 2013-03-11; source msha-controller-operator-history
- **operator_operates_mine:** All Rock LLC → ALL ROCK; 2013-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jim  Jeffries  et al → ALL ROCK; 2013-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim  Jeffries  et al → All Rock LLC; 2013-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sam  Jeffries  et al → All Rock LLC; 2013-03-12 to current/open; source msha-controller-operator-history