# Relationship history for MSHA mine 1515708

Current hierarchy: **Fuson Raymond & Bob → Lawson Bend Coal → Lawson Bend #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:** S & C Coal Company → Lawson Bend #1; 1986-08-01 to 1987-06-07; source msha-controller-operator-history
- **controller_controls_mine:** Childers Barney & Kenneth Ray Smith → Lawson Bend #1; 1986-08-01 to 1987-06-07; source msha-controller-operator-history
- **controller_controls_operator:** Childers Barney & Kenneth Ray Smith → S & C Coal Company; 1986-08-01 to 1987-06-07; source msha-controller-operator-history
- **controller_controls_mine:** Crawford Tim Et Al → Lawson Bend #1; 1987-04-07 to 1987-08-24; source msha-controller-operator-history
- **operator_operates_mine:** Double Q Coal Company → Lawson Bend #1; 1987-06-08 to 1987-08-24; source msha-controller-operator-history
- **controller_controls_operator:** Crawford Tim Et Al → Double Q Coal Company; 1987-06-08 to 1987-08-24; source msha-controller-operator-history
- **operator_operates_mine:** Lawson Bend Coal → Lawson Bend #1; 1987-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fuson Raymond & Bob Et Al → Lawson Bend #1; 1987-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fuson Raymond & Bob Et Al → Lawson Bend Coal; 1987-08-25 to current/open; source msha-controller-operator-history