# Relationship history for MSHA mine 2402555

Current hierarchy: **Shawn  Sime; Ronald  Pike → TMC Inc → TMC Track Screen**

- 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:** Ronald  Pike et al → TMC Track Screen; 1994-10-01 to 2020-11-30; source msha-controller-operator-history
- **operator_operates_mine:** TMC Inc → TMC Track Screen; 2009-07-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald  Pike et al → TMC Inc; 2009-07-21 to 2020-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Hokanson et al → TMC Inc; 2009-07-21 to 2020-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Shawn  Sime et al → TMC Track Screen; 2020-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shawn  Sime et al → TMC Inc; 2020-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald  Pike et al → TMC Inc; 2020-12-01 to current/open; source msha-controller-operator-history