# Relationship history for MSHA mine 4104816

Current hierarchy: **Ben  Morrow → Eagle Materials → Eagle Materials**

- 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:** Premium Aggregates Partners Ltd → Eagle Materials; 2010-04-27 to 2020-12-09; source msha-controller-operator-history
- **controller_controls_mine:** Kevin  Kemp et al → Eagle Materials; 2010-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin  Kemp et al → Premium Aggregates Partners Ltd; 2010-04-27 to 2020-12-09; source msha-controller-operator-history
- **controller_controls_operator:** Steve E  Chapman et al → Premium Aggregates Partners Ltd; 2010-04-27 to 2020-12-09; source msha-controller-operator-history
- **operator_operates_mine:** Eagle Materials → Eagle Materials; 2020-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ben  Morrow → Eagle Materials; 2020-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ben  Morrow → Eagle Materials; 2020-12-10 to current/open; source msha-controller-operator-history