# Relationship history for MSHA mine 3102026

Current hierarchy: **Mc Lamb Jimmy → Lm Mc Lamb & Son Construction Company Inc → Lm Mining**

- 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:** Lm Mc Lamb & Son Construction Company Inc → Lm Mining; 1988-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Lamb Jimmy → Lm Mining; 1988-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Lamb Jimmy → Lm Mc Lamb & Son Construction Company Inc; 1988-08-01 to current/open; source msha-controller-operator-history