# Relationship history for MSHA mine 1901277

Current hierarchy: **James F  Craven → James F Craven General Contractor → Lockbrook Pit & Plant**

- 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:** James F Craven General Contractor → Lockbrook Pit & Plant; 2018-04-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James F  Craven → Lockbrook Pit & Plant; 2018-04-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James F  Craven → James F Craven General Contractor; 2018-04-04 to current/open; source msha-controller-operator-history