# Relationship history for MSHA mine 1516708

Current hierarchy: **Bryan  Robbins → Allison Coal Company Inc → #1**

- 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:** Mdl Corp → #1; 1989-08-01 to 1990-04-24; source msha-controller-operator-history
- **controller_controls_mine:** Lemar David → #1; 1989-08-01 to 1990-04-24; source msha-controller-operator-history
- **controller_controls_operator:** Lemar David → Mdl Corp; 1989-08-01 to 1990-04-24; source msha-controller-operator-history
- **operator_operates_mine:** New Hope Of Kentucky Inc → #1; 1990-04-25 to 1993-08-26; source msha-controller-operator-history
- **controller_controls_mine:** Robbins Ina L → #1; 1990-04-25 to 1993-08-26; source msha-controller-operator-history
- **controller_controls_operator:** Robbins Ina L → New Hope Of Kentucky Inc; 1990-04-25 to 1993-08-26; source msha-controller-operator-history
- **controller_controls_mine:** Connie  Roberts et al → #1; 1991-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wallins Creek Mining Inc → #1; 1993-08-27 to 1994-07-24; source msha-controller-operator-history
- **controller_controls_operator:** Connie  Roberts et al → Wallins Creek Mining Inc; 1993-08-27 to 1994-07-24; source msha-controller-operator-history
- **controller_controls_operator:** Sandra  Roberts et al → Wallins Creek Mining Inc; 1993-08-27 to 1994-07-24; source msha-controller-operator-history
- **controller_controls_mine:** Shanks Greg A → #1; 1994-04-13 to 1996-03-26; source msha-controller-operator-history
- **controller_controls_mine:** Stacy  Roberts → #1; 1994-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cns Mining Inc → #1; 1994-07-25 to 1995-06-08; source msha-controller-operator-history
- **controller_controls_operator:** Stacy  Roberts → Cns Mining Inc; 1994-07-25 to 1995-06-08; source msha-controller-operator-history
- **operator_operates_mine:** Pro Mod Mining Company Inc → #1; 1995-06-09 to 1996-03-03; source msha-controller-operator-history
- **controller_controls_operator:** Shanks Greg A → Pro Mod Mining Company Inc; 1995-06-09 to 1996-03-03; source msha-controller-operator-history
- **operator_operates_mine:** Allison Coal Company Inc → #1; 1996-03-04 to 1996-07-10; source msha-controller-operator-history
- **controller_controls_mine:** Shanks P S → #1; 1996-03-04 to 1996-07-10; source msha-controller-operator-history
- **controller_controls_operator:** Shanks P S → Allison Coal Company Inc; 1996-03-04 to 1996-07-10; source msha-controller-operator-history
- **operator_operates_mine:** Allison Coal Company Inc → #1; 1996-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bryan  Robbins → #1; 1996-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bryan  Robbins → Allison Coal Company Inc; 1996-07-11 to current/open; source msha-controller-operator-history