# Relationship history for MSHA mine 3800636

Current hierarchy: **Clyde Ashley  Anderson → Ashley Anderson → Bear Bluff Materials**

- 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:** Fox Brothers Inc → Bear Bluff Materials; 1989-03-01 to 1995-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Colter  Fox → Bear Bluff Materials; 1989-03-01 to 1995-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Colter  Fox → Fox Brothers Inc; 1989-03-01 to 1995-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Mining & Hauling Inc → Bear Bluff Materials; 1995-10-01 to 1997-07-01; source msha-controller-operator-history
- **controller_controls_mine:** James  Bushong → Bear Bluff Materials; 1995-10-01 to 1997-07-01; source msha-controller-operator-history
- **controller_controls_operator:** James  Bushong → Mining & Hauling Inc; 1995-10-01 to 1997-07-01; source msha-controller-operator-history
- **operator_operates_mine:** Abc Corp Of Sc → Bear Bluff Materials; 1997-07-02 to 2004-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Lida A Lackey  Scott → Bear Bluff Materials; 1997-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lida A Lackey  Scott → Abc Corp Of Sc; 1997-07-02 to 2004-05-18; source msha-controller-operator-history
- **operator_operates_mine:** Ashley Anderson → Bear Bluff Materials; 2004-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clyde Ashley  Anderson → Bear Bluff Materials; 2004-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clyde Ashley  Anderson → Ashley Anderson; 2004-05-19 to current/open; source msha-controller-operator-history