# Relationship history for MSHA mine 1504236

Current hierarchy: **Allen G  Stump → Black River Mining Company Inc → No 3**

- 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:** River Valley Coal Company Inc → No 3; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pecco Coal Company → No 3; 1950-01-01 to 1974-09-12; source msha-controller-operator-history
- **controller_controls_mine:** Pecco Coal Company → No 3; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pecco Coal Company → Pecco Coal Company; 1950-01-01 to 1974-09-12; source msha-controller-operator-history
- **controller_controls_mine:** Bevins Willie → No 3; 1974-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** River Valley Coal Company Inc → No 3; 1974-09-13 to 1975-08-20; source msha-controller-operator-history
- **controller_controls_operator:** River Valley Coal Company Inc → River Valley Coal Company Inc; 1974-09-13 to 1975-08-20; source msha-controller-operator-history
- **operator_operates_mine:** Right Fork Fuel Company Inc → No 3; 1975-08-21 to 1975-11-02; source msha-controller-operator-history
- **controller_controls_mine:** Whitten Keith R → No 3; 1975-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Whitten Keith R → Right Fork Fuel Company Inc; 1975-08-21 to 1975-11-02; source msha-controller-operator-history
- **operator_operates_mine:** Big Lump Coal Company → No 3; 1975-11-03 to 1984-03-08; source msha-controller-operator-history
- **controller_controls_operator:** Bevins Willie → Big Lump Coal Company; 1975-11-03 to 1984-03-08; source msha-controller-operator-history
- **controller_controls_mine:** Allen G  Stump et al → No 3; 1984-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Black River Mining Company Inc → No 3; 1984-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Allen G  Stump et al → Black River Mining Company Inc; 1984-03-09 to current/open; source msha-controller-operator-history