# Relationship history for MSHA mine 0901077

Current hierarchy: **Ted S  Smith → Arcilla Mining & Land, LLC → Sheppard**

- 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:** Arcilla Mining & Land Company → Sheppard; 1993-11-01 to 2011-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Ted S  Smith → Sheppard; 1993-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ted S  Smith → Arcilla Mining & Land Company; 1993-11-01 to 2011-01-02; source msha-controller-operator-history
- **operator_operates_mine:** Arcilla Mining & Land, LLC → Sheppard; 2011-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ted S  Smith → Sheppard; 2011-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ted S  Smith → Arcilla Mining & Land, LLC; 2011-01-03 to current/open; source msha-controller-operator-history