# Relationship history for MSHA mine 1506355

Current hierarchy: **Elkins Ralph H → Old Circle Coal Company Inc → Turner 3 Tipple**

- 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:** Colley Coal & Land Company Inc → Turner 3 Tipple; 1950-01-01 to 1975-03-07; source msha-controller-operator-history
- **controller_controls_mine:** Colley Coal & Land Company Inc → Turner 3 Tipple; 1950-01-01 to 1975-03-07; source msha-controller-operator-history
- **controller_controls_operator:** Colley Coal & Land Company Inc → Colley Coal & Land Company Inc; 1950-01-01 to 1975-03-07; source msha-controller-operator-history
- **controller_controls_mine:** Cooley Jack C → Turner 3 Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Old Circle Coal Inc → Turner 3 Tipple; 1975-03-08 to 1978-10-04; source msha-controller-operator-history
- **controller_controls_operator:** Cooley Jack C → Old Circle Coal Inc; 1975-03-08 to 1978-10-04; source msha-controller-operator-history
- **operator_operates_mine:** Old Circle Coal Company Inc → Turner 3 Tipple; 1978-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Elkins Ralph H → Turner 3 Tipple; 1978-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elkins Ralph H → Old Circle Coal Company Inc; 1978-10-05 to current/open; source msha-controller-operator-history