# Relationship history for MSHA mine 2402099

Current hierarchy: **Lukas R  Clark → Titan Inc → Titan Materials**

- 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:** Titan Inc → Titan Materials; 1996-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John O  Roberts → Titan Materials; 1996-10-01 to 2015-09-24; source msha-controller-operator-history
- **controller_controls_operator:** John O  Roberts → Titan Inc; 1996-10-01 to 2015-09-24; source msha-controller-operator-history
- **controller_controls_mine:** David D Clark et al → Titan Materials; 2015-09-25 to 2024-02-29; source msha-controller-operator-history
- **controller_controls_operator:** David D Clark et al → Titan Inc; 2015-09-25 to 2024-02-29; source msha-controller-operator-history
- **controller_controls_operator:** Dulcie  Clark et al → Titan Inc; 2015-09-25 to 2024-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Lukas R  Clark → Titan Materials; 2024-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lukas R  Clark → Titan Inc; 2024-03-01 to current/open; source msha-controller-operator-history