# Relationship history for MSHA mine 1516372

Current hierarchy: **Phipps William → Black Mountain Coal Mining Company Inc → Black Mtn Coal Mng Co Mine #2**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Mize Lanious & Jackie Et Al → Black Mtn Coal Mng Co Mine #2; 1987-06-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Four A Coal Company → Black Mtn Coal Mng Co Mine #2; 1988-05-01 to 1990-10-28; source msha-controller-operator-history
- **controller_controls_mine:** Asbury Charles M - Gary Asher Et Al → Black Mtn Coal Mng Co Mine #2; 1988-05-01 to 1991-02-03; source msha-controller-operator-history
- **controller_controls_operator:** Asbury Charles M - Gary Asher Et Al → Four A Coal Company; 1988-05-01 to 1990-10-28; source msha-controller-operator-history
- **operator_operates_mine:** L & J Coal Company Inc → Black Mtn Coal Mng Co Mine #2; 1990-10-29 to 1992-06-21; source msha-controller-operator-history
- **controller_controls_operator:** Mize Lanious & Jackie Et Al → L & J Coal Company Inc; 1990-10-29 to 1992-06-21; source msha-controller-operator-history
- **controller_controls_mine:** Phipps William → Black Mtn Coal Mng Co Mine #2; 1991-02-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Crystal Energy Inc → Black Mtn Coal Mng Co Mine #2; 1992-06-22 to 1993-02-22; source msha-controller-operator-history
- **controller_controls_mine:** Darrell  Wagner → Black Mtn Coal Mng Co Mine #2; 1992-06-22 to 1993-02-22; source msha-controller-operator-history
- **controller_controls_operator:** Darrell  Wagner → Crystal Energy Inc; 1992-06-22 to 1993-02-22; source msha-controller-operator-history
- **operator_operates_mine:** Black Mountain Coal Mining Company Inc → Black Mtn Coal Mng Co Mine #2; 1993-02-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Phipps William → Black Mountain Coal Mining Company Inc; 1993-02-23 to current/open; source msha-controller-operator-history