# Relationship history for MSHA mine 0102253

Current hierarchy: **Burgess A E-Charles R-Wm C → May & Associates → Cullman Pit No 1**

- 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:** May & Associates → Cullman Pit No 1; 1980-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Burgess A E-Charles R-Wm C Et Al → Cullman Pit No 1; 1980-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Burgess A E-Charles R-Wm C Et Al → May & Associates; 1980-10-01 to current/open; source msha-controller-operator-history