# Relationship history for MSHA mine 1512178

Current hierarchy: **Adams John M → Dawn Construction Inc → Dawn'S Construction No 2**

- 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:** Adams John M Et Al → Dawn'S Construction No 2; 1979-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dawn Construction Inc → Dawn'S Construction No 2; 1979-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adams John M Et Al → Dawn Construction Inc; 1979-12-01 to current/open; source msha-controller-operator-history