# Relationship history for MSHA mine 0504815

Current hierarchy: **Scott T  Canda → MS Forest → Bar Nothing Gravel Pit**

- 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:** MS Forest → Bar Nothing Gravel Pit; 2005-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Scott T  Canda → Bar Nothing Gravel Pit; 2005-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott T  Canda → MS Forest; 2005-04-13 to current/open; source msha-controller-operator-history