# Relationship history for MSHA mine 3607225

Current hierarchy: **Nestico Anthony W → Hidden Valley Coal Company → Bagging Plant**

- 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:** Blascovich Trucking & Mining → Bagging Plant; 1981-10-01 to 1989-04-03; source msha-controller-operator-history
- **controller_controls_mine:** Blascovich Ben → Bagging Plant; 1981-10-01 to 1989-04-03; source msha-controller-operator-history
- **controller_controls_operator:** Blascovich Ben → Blascovich Trucking & Mining; 1981-10-01 to 1989-04-03; source msha-controller-operator-history
- **operator_operates_mine:** Bellaire Coal & Development Company Inc → Bagging Plant; 1989-04-04 to 1992-02-10; source msha-controller-operator-history
- **controller_controls_mine:** Stanchick Beverly → Bagging Plant; 1989-04-04 to 1992-02-10; source msha-controller-operator-history
- **controller_controls_operator:** Stanchick Beverly → Bellaire Coal & Development Company Inc; 1989-04-04 to 1992-02-10; source msha-controller-operator-history
- **controller_controls_mine:** Nestico Bernard J → Bagging Plant; 1991-11-20 to 1995-05-24; source msha-controller-operator-history
- **operator_operates_mine:** Eagle Run Coal Company Inc → Bagging Plant; 1992-02-11 to 1995-05-24; source msha-controller-operator-history
- **controller_controls_operator:** Nestico Bernard J → Eagle Run Coal Company Inc; 1992-02-11 to 1995-05-24; source msha-controller-operator-history
- **operator_operates_mine:** Hidden Valley Coal Company → Bagging Plant; 1995-05-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nestico Anthony W → Bagging Plant; 1995-05-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nestico Anthony W → Hidden Valley Coal Company; 1995-05-25 to current/open; source msha-controller-operator-history