# Relationship history for MSHA mine 1001979

Current hierarchy: **Gale  Lim → Gale Lim Construction LLC → Portable Plant #3**

- 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:** Gale  Lim → Portable Plant #3; 1986-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gale Lim Construction Inc → Portable Plant #3; 2000-06-01 to 2008-03-06; source msha-controller-operator-history
- **controller_controls_operator:** Gale  Lim → Gale Lim Construction Inc; 2000-06-01 to 2008-03-06; source msha-controller-operator-history
- **operator_operates_mine:** Gale Lim Construction LLC → Portable Plant #3; 2008-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gale  Lim → Portable Plant #3; 2008-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gale  Lim → Gale Lim Construction LLC; 2008-03-07 to current/open; source msha-controller-operator-history