# Relationship history for MSHA mine 3606842

Current hierarchy: **Albert George & Michael Keklak → Loomis Development Company → Telco**

- 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:** Myrtetus George B → Telco; 1979-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Telco Coal Operations Inc → Telco; 1979-05-01 to 1992-07-29; source msha-controller-operator-history
- **controller_controls_operator:** Myrtetus George B → Telco Coal Operations Inc; 1979-05-01 to 1992-07-29; source msha-controller-operator-history
- **operator_operates_mine:** Loomis Development Company → Telco; 1992-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Albert George & Michael Keklak → Telco; 1992-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Albert George & Michael Keklak → Loomis Development Company; 1992-07-30 to current/open; source msha-controller-operator-history