# Relationship history for MSHA mine 4003520

Current hierarchy: **Amado  Gomez; Venancio  Gomez → Gomez Mountain Stone → Gomez Mountain Stone**

- 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:** Dunlap Building Stone → Gomez Mountain Stone; 2019-05-08 to 2021-07-12; source msha-controller-operator-history
- **controller_controls_mine:** Peggy J  Sanders → Gomez Mountain Stone; 2019-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peggy J  Sanders → Dunlap Building Stone; 2019-05-08 to 2021-07-12; source msha-controller-operator-history
- **operator_operates_mine:** Gomez Mountain Stone → Gomez Mountain Stone; 2021-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Amado  Gomez et al → Gomez Mountain Stone; 2021-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amado  Gomez et al → Gomez Mountain Stone; 2021-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Venancio  Gomez et al → Gomez Mountain Stone; 2021-07-13 to current/open; source msha-controller-operator-history