# Relationship history for MSHA mine 3605217

Current hierarchy: **Norma  Percival → Falcon Coal & Construction Company Inc → Falcon Coal & Construction Co**

- 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:** Milo Coal Company → Falcon Coal & Construction Co; 1974-01-01 to 1974-09-20; source msha-controller-operator-history
- **controller_controls_mine:** Milo Coal Company → Falcon Coal & Construction Co; 1974-01-01 to 1974-09-20; source msha-controller-operator-history
- **controller_controls_operator:** Milo Coal Company → Milo Coal Company; 1974-01-01 to 1974-09-20; source msha-controller-operator-history
- **operator_operates_mine:** Oliveri Coal Company → Falcon Coal & Construction Co; 1974-09-21 to 1975-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Oliveri Coal Company → Falcon Coal & Construction Co; 1974-09-21 to 1975-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Oliveri Coal Company → Oliveri Coal Company; 1974-09-21 to 1975-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Falcon Coal & Construction Company Inc → Falcon Coal & Construction Co; 1975-11-16 to 1981-05-17; source msha-controller-operator-history
- **controller_controls_mine:** Norma  Percival → Falcon Coal & Construction Co; 1975-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Norma  Percival → Falcon Coal & Construction Company Inc; 1975-11-16 to 1981-05-17; source msha-controller-operator-history
- **operator_operates_mine:** D & F Coal Company Inc → Falcon Coal & Construction Co; 1981-05-18 to 1997-09-21; source msha-controller-operator-history
- **controller_controls_mine:** Donald  Fiorini → Falcon Coal & Construction Co; 1981-05-18 to 1997-09-21; source msha-controller-operator-history
- **controller_controls_operator:** Donald  Fiorini → D & F Coal Company Inc; 1981-05-18 to 1997-09-21; source msha-controller-operator-history
- **operator_operates_mine:** Falcon Coal & Construction Company Inc → Falcon Coal & Construction Co; 1997-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Norma  Percival → Falcon Coal & Construction Company Inc; 1997-09-22 to current/open; source msha-controller-operator-history