# Relationship history for MSHA mine 4101138

Current hierarchy: **Brian T  Etchison; Ralph E  Janes IV → R .E. Janes Gravel Company → R E JANES GRAVEL CO**

- 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:** R .E. Janes Gravel Company → R E JANES GRAVEL CO; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ralph E  Janes III → R E JANES GRAVEL CO; 1950-01-01 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Ralph E  Janes III → R .E. Janes Gravel Company; 1950-01-01 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Ralph E  Janes IV et al → R E JANES GRAVEL CO; 2014-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ralph E  Janes IV et al → R .E. Janes Gravel Company; 2014-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian T  Etchison et al → R .E. Janes Gravel Company; 2014-01-01 to current/open; source msha-controller-operator-history