# Relationship history for MSHA mine 3500501

Current hierarchy: **Jeanne M  (Seubert) McDonough → Clearwater Concrete, Inc. → Nyssa Pit**

- 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:** Idaho Concrete Company Inc → Nyssa Pit; 1950-01-01 to 1986-03-27; source msha-controller-operator-history
- **controller_controls_mine:** Robert L  Rice et al → Nyssa Pit; 1950-01-01 to 2000-03-26; source msha-controller-operator-history
- **controller_controls_operator:** Robert L  Rice et al → Idaho Concrete Company Inc; 1950-01-01 to 1986-03-27; source msha-controller-operator-history
- **operator_operates_mine:** Oregon Concrete LLC → Nyssa Pit; 1986-03-28 to 2011-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Merle  Maine → Nyssa Pit; 1986-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Merle  Maine → Oregon Concrete LLC; 1986-03-28 to 2011-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Jeanne M  (Seubert) McDonough et al → Nyssa Pit; 1996-05-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Clearwater Concrete, Inc. → Nyssa Pit; 2012-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeanne M  (Seubert) McDonough et al → Clearwater Concrete, Inc.; 2012-01-01 to current/open; source msha-controller-operator-history