# Relationship history for MSHA mine 2200733

Current hierarchy: **Gary  Tanner → Tanner Construction Company Incorporated → Prentiss 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:** A E Boyer Company Llc → Prentiss Pit; 2000-09-01 to 2001-01-04; source msha-controller-operator-history
- **controller_controls_mine:** Amos (Eddie)  Boyer Jr → Prentiss Pit; 2000-09-01 to 2001-01-04; source msha-controller-operator-history
- **controller_controls_operator:** Amos (Eddie)  Boyer Jr → A E Boyer Company Llc; 2000-09-01 to 2001-01-04; source msha-controller-operator-history
- **operator_operates_mine:** Tanner Construction Company Incorporated → Prentiss Pit; 2001-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Tanner → Prentiss Pit; 2001-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Tanner → Tanner Construction Company Incorporated; 2001-01-05 to current/open; source msha-controller-operator-history