# Relationship history for MSHA mine 1516289

Current hierarchy: **Brent  Coleman → R B M Enterprises Inc → No 4**

- 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:** Salyers Gene & William Stiltner → No 4; 1984-03-01 to 1990-05-28; source msha-controller-operator-history
- **controller_controls_mine:** Brent  Coleman et al → No 4; 1987-02-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Taylor Hill Coal Company → No 4; 1988-02-01 to 1990-05-28; source msha-controller-operator-history
- **controller_controls_operator:** Salyers Gene & William Stiltner → Taylor Hill Coal Company; 1988-02-01 to 1990-05-28; source msha-controller-operator-history
- **controller_controls_mine:** Infinity Coal Corp → No 4; 1989-03-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hickory Hill Development Corp → No 4; 1990-05-29 to 1991-02-18; source msha-controller-operator-history
- **controller_controls_operator:** Infinity Coal Corp → Hickory Hill Development Corp; 1990-05-29 to 1991-02-18; source msha-controller-operator-history
- **operator_operates_mine:** R B M Enterprises Inc → No 4; 1991-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brent  Coleman et al → R B M Enterprises Inc; 1991-02-19 to current/open; source msha-controller-operator-history