# Relationship history for MSHA mine 2800012

Current hierarchy: **Arcosa, Inc → Oldwick Materials LLC → Oldwick Materials LLC**

- 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:** Houdaille Construction Materials Inc → Oldwick Materials LLC; 1950-01-01 to 1978-09-01; source msha-controller-operator-history
- **controller_controls_mine:** Houdaille Industries Inc → Oldwick Materials LLC; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Houdaille Industries Inc → Houdaille Construction Materials Inc; 1950-01-01 to 1978-09-01; source msha-controller-operator-history
- **operator_operates_mine:** Oldwick Materials Inc → Oldwick Materials LLC; 1978-09-02 to 2002-08-12; source msha-controller-operator-history
- **controller_controls_mine:** Manzo Michael J → Oldwick Materials LLC; 1978-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Manzo Michael J → Oldwick Materials Inc; 1978-09-02 to 2002-08-12; source msha-controller-operator-history
- **operator_operates_mine:** Oldwick Materials LLC → Oldwick Materials LLC; 2002-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard J  Stavola et al → Oldwick Materials LLC; 2002-08-13 to 2024-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Richard J  Stavola et al → Oldwick Materials LLC; 2002-08-13 to 2024-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Stavola III et al → Oldwick Materials LLC; 2002-08-13 to 2024-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Arcosa, Inc → Oldwick Materials LLC; 2024-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arcosa, Inc → Oldwick Materials LLC; 2024-10-01 to current/open; source msha-controller-operator-history