# Relationship history for MSHA mine 5400378

Current hierarchy: **Augusto  Hernandez → Augusto Hernandez → GRAVERO LA VEGA**

- 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

- **operator_operates_mine:** L B Aggregate → GRAVERO LA VEGA; 1995-10-01 to 1997-12-02; source msha-controller-operator-history
- **controller_controls_mine:** Angel L  Bermudez → GRAVERO LA VEGA; 1995-10-01 to 1997-12-02; source msha-controller-operator-history
- **controller_controls_operator:** Angel L  Bermudez → L B Aggregate; 1995-10-01 to 1997-12-02; source msha-controller-operator-history
- **operator_operates_mine:** Metro Arena Inc → GRAVERO LA VEGA; 1997-12-03 to 1999-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Jose  Bonilla  et al → GRAVERO LA VEGA; 1997-12-03 to 1999-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Jose  Bonilla  et al → Metro Arena Inc; 1997-12-03 to 1999-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Augusto Hernandez → GRAVERO LA VEGA; 1999-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Augusto  Hernandez → GRAVERO LA VEGA; 1999-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Augusto  Hernandez → Augusto Hernandez; 1999-02-01 to current/open; source msha-controller-operator-history