# Relationship history for MSHA mine 0503065

Current hierarchy: **Mills Vance → Trinidad Basin Mining Inc → Trinidad Basin 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Delagua Coal Company Inc → Trinidad Basin Mine; 1977-06-01 to 1980-09-03; source msha-controller-operator-history
- **controller_controls_mine:** Wiggins Alvin E → Trinidad Basin Mine; 1977-06-01 to 1980-09-03; source msha-controller-operator-history
- **controller_controls_operator:** Wiggins Alvin E → Delagua Coal Company Inc; 1977-06-01 to 1980-09-03; source msha-controller-operator-history
- **operator_operates_mine:** Trinidad Basin Mining Inc → Trinidad Basin Mine; 1980-09-04 to 1982-09-19; source msha-controller-operator-history
- **controller_controls_mine:** Mills Vance Et Al → Trinidad Basin Mine; 1980-09-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mills Vance Et Al → Trinidad Basin Mining Inc; 1980-09-04 to 1982-09-19; source msha-controller-operator-history
- **operator_operates_mine:** Trinidad Basin Mining Inc → Trinidad Basin Mine; 1982-09-20 to 1983-04-19; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Asher → Trinidad Basin Mine; 1982-09-20 to 1983-04-19; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Asher → Trinidad Basin Mining Inc; 1982-09-20 to 1983-04-19; source msha-controller-operator-history
- **operator_operates_mine:** Trinidad Basin Mining Inc → Trinidad Basin Mine; 1983-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mills Vance Et Al → Trinidad Basin Mining Inc; 1983-04-20 to current/open; source msha-controller-operator-history