# Relationship history for MSHA mine 4608525

Current hierarchy: **James B  Simpkins → Cow Creek Coal Company Inc → Stockton 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** James B  Simpkins → Stockton No 2; 1991-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sandra  Dotson → Stockton No 2; 1994-10-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Seaboard Energy Inc → Stockton No 2; 1995-09-01 to 1995-10-24; source msha-controller-operator-history
- **controller_controls_operator:** Sandra  Dotson → Seaboard Energy Inc; 1995-09-01 to 1995-10-24; source msha-controller-operator-history
- **operator_operates_mine:** Cow Creek Coal Company Inc → Stockton No 2; 1995-10-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James B  Simpkins → Cow Creek Coal Company Inc; 1995-10-25 to current/open; source msha-controller-operator-history