# Relationship history for MSHA mine 2003320

Current hierarchy: **Brian D Carrick; Mark A Carrick; Dean B Carrick → Carrick Trucking & Gravel Inc → Tomak Pit**

- 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:** Tomak Excavating → Tomak Pit; 2005-06-08 to 2020-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Edward S  Tomak → Tomak Pit; 2005-06-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward S  Tomak → Tomak Excavating; 2005-06-08 to 2020-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Brian D Carrick et al → Tomak Pit; 2018-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Carrick Trucking & Gravel Inc → Tomak Pit; 2020-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian D Carrick et al → Carrick Trucking & Gravel Inc; 2020-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dean B Carrick et al → Carrick Trucking & Gravel Inc; 2020-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark A Carrick et al → Carrick Trucking & Gravel Inc; 2020-03-18 to current/open; source msha-controller-operator-history