# Relationship history for MSHA mine 0401755

Current hierarchy: **Brian K  Hurt → Geo Aggregates → Ten Mile River Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Baxman Gravel Co Inc → Ten Mile River Plant; 1950-01-01 to 2012-05-13; source msha-controller-operator-history
- **controller_controls_mine:** Steven E  Baxman → Ten Mile River Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven E  Baxman → Baxman Gravel Co Inc; 1950-01-01 to 2012-05-13; source msha-controller-operator-history
- **controller_controls_mine:** Dennis James  Kirwan et al → Ten Mile River Plant; 2012-04-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Geo Aggregates → Ten Mile River Plant; 2012-05-14 to 2018-07-26; source msha-controller-operator-history
- **controller_controls_operator:** Dennis James  Kirwan et al → Geo Aggregates; 2012-05-14 to 2018-07-26; source msha-controller-operator-history
- **operator_operates_mine:** Geo Aggregates → Ten Mile River Plant; 2018-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brian K  Hurt → Ten Mile River Plant; 2018-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian K  Hurt → Geo Aggregates; 2018-07-27 to current/open; source msha-controller-operator-history