# Relationship history for MSHA mine 0503878

Current hierarchy: **Costello James J → James J Costello → Little Silver**

- 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 J Costello → Little Silver; 1983-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Costello James J → Little Silver; 1983-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Costello James J → James J Costello; 1983-07-01 to current/open; source msha-controller-operator-history