# Relationship history for MSHA mine 3401212

Current hierarchy: **Rowand Richard → Ram Constructors Inc → Blue Creek Mine No 2**

- 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

- **operator_operates_mine:** Double D Mining Inc → Blue Creek Mine No 2; 1979-07-01 to 1980-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Addis Dallas → Blue Creek Mine No 2; 1979-07-01 to 1980-10-04; source msha-controller-operator-history
- **controller_controls_operator:** Addis Dallas → Double D Mining Inc; 1979-07-01 to 1980-10-04; source msha-controller-operator-history
- **operator_operates_mine:** Ram Constructors Inc → Blue Creek Mine No 2; 1980-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rowand Richard → Blue Creek Mine No 2; 1980-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rowand Richard → Ram Constructors Inc; 1980-10-05 to current/open; source msha-controller-operator-history