# Relationship history for MSHA mine 4401898

Current hierarchy: **Pittston Company → Sea B Mining Company → No 11-C 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:** Jewell Ridge Mining Corp → No 11-C Mine; 1950-01-01 to 1988-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Pittston Company → No 11-C Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Jewell Ridge Mining Corp; 1950-01-01 to 1988-07-25; source msha-controller-operator-history
- **operator_operates_mine:** Jamie Marcus Coal Company Inc → No 11-C Mine; 1988-07-26 to 1991-02-20; source msha-controller-operator-history
- **controller_controls_mine:** Keen Larry R → No 11-C Mine; 1988-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keen Larry R → Jamie Marcus Coal Company Inc; 1988-07-26 to 1991-02-20; source msha-controller-operator-history
- **operator_operates_mine:** Sea B Mining Company → No 11-C Mine; 1991-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Sea B Mining Company; 1991-02-21 to current/open; source msha-controller-operator-history