# Relationship history for MSHA mine 3401619

Current hierarchy: **Arcosa, Inc → Trinity Materials Inc → Colbert #2038**

- 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:** Dyson Sand & Gravel → Colbert #2038; 1987-06-01 to 2001-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Dyson Jerry → Colbert #2038; 1987-06-01 to 2001-05-14; source msha-controller-operator-history
- **controller_controls_operator:** Dyson Jerry → Dyson Sand & Gravel; 1987-06-01 to 2001-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Trinity Industries Inc → Colbert #2038; 1991-12-01 to 2018-10-31; source msha-controller-operator-history
- **operator_operates_mine:** State Line Resources → Colbert #2038; 2001-05-15 to 2003-10-19; source msha-controller-operator-history
- **controller_controls_mine:** Kent  Flannagan et al → Colbert #2038; 2001-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kent  Flannagan et al → State Line Resources; 2001-05-15 to 2003-10-19; source msha-controller-operator-history
- **controller_controls_operator:** Tom  Johnson et al → State Line Resources; 2001-05-15 to 2003-10-19; source msha-controller-operator-history
- **operator_operates_mine:** Trinity Materials Inc → Colbert #2038; 2003-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Trinity Industries Inc → Trinity Materials Inc; 2003-10-20 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Arcosa, Inc → Colbert #2038; 2018-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arcosa, Inc → Trinity Materials Inc; 2018-11-01 to current/open; source msha-controller-operator-history