# Relationship history for MSHA mine 0102169

Current hierarchy: **Vicat S A → National Cement Company of Alabama, Inc. → Hebble Mine**

- 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

- **controller_controls_mine:** Vicat S A → Hebble Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Richey Excavating Inc → Hebble Mine; 1980-02-01 to 1990-04-26; source msha-controller-operator-history
- **controller_controls_mine:** Dale  Richey → Hebble Mine; 1980-02-01 to 1990-04-26; source msha-controller-operator-history
- **controller_controls_operator:** Dale  Richey → Richey Excavating Inc; 1980-02-01 to 1990-04-26; source msha-controller-operator-history
- **operator_operates_mine:** Bec/Philip → Hebble Mine; 1990-04-27 to 1999-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Philip Services Corp → Hebble Mine; 1990-04-27 to 1999-01-02; source msha-controller-operator-history
- **controller_controls_operator:** Philip Services Corp → Bec/Philip; 1990-04-27 to 1999-01-02; source msha-controller-operator-history
- **operator_operates_mine:** Abercrombie Excavation → Hebble Mine; 1999-01-03 to 2003-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Mack  Abercrombie → Hebble Mine; 1999-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mack  Abercrombie → Abercrombie Excavation; 1999-01-03 to 2003-12-31; source msha-controller-operator-history
- **operator_operates_mine:** National Cement Company of Alabama, Inc. → Hebble Mine; 2004-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vicat S A → National Cement Company of Alabama, Inc.; 2004-01-01 to current/open; source msha-controller-operator-history