# Relationship history for MSHA mine 3606318

Current hierarchy: **Ripp J & R Werbel → Kittanning Coal Company Inc → Kittanning Coal Company Incorporated**

- 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

- **operator_operates_mine:** Kitt Coal Company Inc → Kittanning Coal Company Incorporated; 1977-01-13 to 1979-03-06; source msha-controller-operator-history
- **controller_controls_mine:** Mc Cann John H & John W Benson → Kittanning Coal Company Incorporated; 1977-01-13 to 1979-03-06; source msha-controller-operator-history
- **controller_controls_operator:** Mc Cann John H & John W Benson → Kitt Coal Company Inc; 1977-01-13 to 1979-03-06; source msha-controller-operator-history
- **operator_operates_mine:** Kittanning Coal Company Inc → Kittanning Coal Company Incorporated; 1979-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ripp J & R Werbel Et Al → Kittanning Coal Company Incorporated; 1979-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ripp J & R Werbel Et Al → Kittanning Coal Company Inc; 1979-03-07 to current/open; source msha-controller-operator-history