# Relationship history for MSHA mine 4404744

Current hierarchy: **Mountain Top Fuel Inc → John B Mining Company Inc → Surface Mine #1**

- 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:** John B Mining Company → Surface Mine #1; 1977-04-01 to 1977-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Mc Clanahan James R - J K Mc Coy & Sue H Dotson → Surface Mine #1; 1977-04-01 to 1977-11-14; source msha-controller-operator-history
- **controller_controls_operator:** Mc Clanahan James R - J K Mc Coy & Sue H Dotson → John B Mining Company; 1977-04-01 to 1977-11-14; source msha-controller-operator-history
- **operator_operates_mine:** John B Mining Company → Surface Mine #1; 1977-11-15 to 1978-01-16; source msha-controller-operator-history
- **controller_controls_mine:** Belcher Billie R → Surface Mine #1; 1977-11-15 to 1978-01-16; source msha-controller-operator-history
- **controller_controls_operator:** Belcher Billie R → John B Mining Company; 1977-11-15 to 1978-01-16; source msha-controller-operator-history
- **operator_operates_mine:** John B Mining Company Inc → Surface Mine #1; 1978-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mountain Top Fuel Inc → Surface Mine #1; 1978-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mountain Top Fuel Inc → John B Mining Company Inc; 1978-01-17 to current/open; source msha-controller-operator-history