# Relationship history for MSHA mine 4608749

Current hierarchy: **Dennis R  Hagerman → B & I Coal Inc → Mine  #33A**

- 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:** Brian  Cline → Mine  #33A; 1997-07-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Albatross Mining Corp → Mine  #33A; 1998-12-01 to 1999-08-01; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Cline → Albatross Mining Corp; 1998-12-01 to 1999-08-01; source msha-controller-operator-history
- **operator_operates_mine:** B & I Coal Inc → Mine  #33A; 1999-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dennis R  Hagerman → Mine  #33A; 1999-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis R  Hagerman → B & I Coal Inc; 1999-08-02 to current/open; source msha-controller-operator-history