# Relationship history for MSHA mine 0901250

Current hierarchy: **David M  Avant Jr; Paul D  Coughlan → Southeastern Performance Minerals → Chambers Mine**

- 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

- **controller_controls_mine:** Paul D  Coughlan et al → Chambers Mine; 2015-06-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southeastern Performance Minerals → Chambers Mine; 2019-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul D  Coughlan et al → Southeastern Performance Minerals; 2019-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David M  Avant Jr et al → Southeastern Performance Minerals; 2019-05-13 to current/open; source msha-controller-operator-history