# Relationship history for MSHA mine 4604077

Current hierarchy: **Groves S J & Sons Company → Manlo Mining Company → Springdale No 1 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:** Springdale Fuel Company Inc → Springdale No 1 Tipple; 1974-01-01 to 1975-01-01; source msha-controller-operator-history
- **controller_controls_mine:** Burke George → Springdale No 1 Tipple; 1974-01-01 to 1975-01-01; source msha-controller-operator-history
- **controller_controls_operator:** Burke George → Springdale Fuel Company Inc; 1974-01-01 to 1975-01-01; source msha-controller-operator-history
- **controller_controls_mine:** Impco-International Mining & Petroleum Co → Springdale No 1 Tipple; 1974-10-15 to 1976-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Impco-Springdale Fuels Company → Springdale No 1 Tipple; 1975-01-02 to 1976-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Impco-International Mining & Petroleum Co → Impco-Springdale Fuels Company; 1975-01-02 to 1976-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Manlo Mining Company Inc → Springdale No 1 Tipple; 1977-01-01 to 1978-06-25; source msha-controller-operator-history
- **controller_controls_mine:** Mansfield John → Springdale No 1 Tipple; 1977-01-01 to 1978-06-25; source msha-controller-operator-history
- **controller_controls_operator:** Mansfield John → Manlo Mining Company Inc; 1977-01-01 to 1978-06-25; source msha-controller-operator-history
- **operator_operates_mine:** Manlo Mining Company → Springdale No 1 Tipple; 1978-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Groves S J & Sons Company → Springdale No 1 Tipple; 1978-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Groves S J & Sons Company → Manlo Mining Company; 1978-06-26 to current/open; source msha-controller-operator-history