# Relationship history for MSHA mine 4608341

Current hierarchy: **Eddie  Hurley → Sapphire Mining Company Inc → Sapphire Min Co Inc #2 A**

- 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

- **controller_controls_mine:** Massey Energy Company → Sapphire Min Co Inc #2 A; 1993-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ferrell'S Branch Coal Company Inc → Sapphire Min Co Inc #2 A; 1993-09-01 to 1994-07-28; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Ferrell'S Branch Coal Company Inc; 1993-09-01 to 1994-07-28; source msha-controller-operator-history
- **controller_controls_mine:** Eddie  Hurley → Sapphire Min Co Inc #2 A; 1994-02-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sapphire Mining Company Inc → Sapphire Min Co Inc #2 A; 1994-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eddie  Hurley → Sapphire Mining Company Inc; 1994-07-29 to current/open; source msha-controller-operator-history