# Relationship history for MSHA mine 3607928

Current hierarchy: **Scott E  Fieg → FIEG BROS COAL CO. → FIEG BROS COAL CO.**

- 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:** Fieg Bros Coal Co. → FIEG BROS COAL CO.; 1987-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Scott E  Fieg → FIEG BROS COAL CO.; 1987-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott E  Fieg → Fieg Bros Coal Co.; 1987-09-01 to current/open; source msha-controller-operator-history