# Relationship history for MSHA mine 4103260

Current hierarchy: **Jerry D  Graves Jr; Donna  Graves → A-Rock Materials → BRAZOS RIVER PIT**

- 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:** Evelyn  Graves  et al → BRAZOS RIVER PIT; 1950-01-01 to 2012-04-01; source msha-controller-operator-history
- **operator_operates_mine:** A-Rock Materials → BRAZOS RIVER PIT; 1984-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Evelyn  Graves  et al → A-Rock Materials; 1984-10-01 to 2012-04-01; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Graves  et al → A-Rock Materials; 1984-10-01 to 2012-04-01; source msha-controller-operator-history
- **controller_controls_mine:** Jerry D  Graves Jr et al → BRAZOS RIVER PIT; 2012-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry D  Graves Jr et al → A-Rock Materials; 2012-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donna  Graves et al → A-Rock Materials; 2012-04-02 to current/open; source msha-controller-operator-history