# Relationship history for MSHA mine 1901109

Current hierarchy: **Theodore W  Ondrick; Adam J  Ondrick → Ondrick Portable Crushing & Paving, LLC → Hard Rock Plant #2**

- 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:** Theodore J  Ondrick → Hard Rock Plant #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ted Ondrick Company, LLC → Hard Rock Plant #2; 2001-10-12 to 2019-02-26; source msha-controller-operator-history
- **controller_controls_operator:** Theodore J  Ondrick → Ted Ondrick Company, LLC; 2001-10-12 to 2019-02-26; source msha-controller-operator-history
- **operator_operates_mine:** Ondrick Portable Crushing & Paving, LLC → Hard Rock Plant #2; 2019-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Theodore W  Ondrick et al → Hard Rock Plant #2; 2019-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Theodore W  Ondrick et al → Ondrick Portable Crushing & Paving, LLC; 2019-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adam J  Ondrick et al → Ondrick Portable Crushing & Paving, LLC; 2019-02-27 to current/open; source msha-controller-operator-history