# Relationship history for MSHA mine 3304514

Current hierarchy: **John D  Ellis → United Aggregates Inc. → United Aggregates Inc.**

- 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:** John D  Ellis et al → United Aggregates Inc.; 1994-09-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mohican Valley Aggregate LLC → United Aggregates Inc.; 2003-03-17 to 2005-02-28; source msha-controller-operator-history
- **controller_controls_mine:** David P  Hawk → United Aggregates Inc.; 2003-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David P  Hawk → Mohican Valley Aggregate LLC; 2003-03-17 to 2005-02-28; source msha-controller-operator-history
- **operator_operates_mine:** United Aggregates Inc. → United Aggregates Inc.; 2005-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John D  Ellis et al → United Aggregates Inc.; 2005-03-01 to current/open; source msha-controller-operator-history