# Relationship history for MSHA mine 1512016

Current hierarchy: **Reese Thomas L → Lakeside Energy → Mine No 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** C P N Coal Company → Mine No 1; 1979-08-01 to 1980-07-23; source msha-controller-operator-history
- **controller_controls_mine:** Nicolls C Parks--George Isaac Jr & Martin Coots → Mine No 1; 1979-08-01 to 1980-07-23; source msha-controller-operator-history
- **controller_controls_operator:** Nicolls C Parks--George Isaac Jr & Martin Coots → C P N Coal Company; 1979-08-01 to 1980-07-23; source msha-controller-operator-history
- **operator_operates_mine:** Traces Branch Mining → Mine No 1; 1980-07-24 to 1983-02-07; source msha-controller-operator-history
- **controller_controls_mine:** Ison Edward C Et Al → Mine No 1; 1980-07-24 to 1983-02-07; source msha-controller-operator-history
- **controller_controls_operator:** Ison Edward C Et Al → Traces Branch Mining; 1980-07-24 to 1983-02-07; source msha-controller-operator-history
- **operator_operates_mine:** Lakeside Energy → Mine No 1; 1983-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Reese Thomas L → Mine No 1; 1983-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reese Thomas L → Lakeside Energy; 1983-02-08 to current/open; source msha-controller-operator-history