# Relationship history for MSHA mine 0900974

Current hierarchy: **Zachary  Rountree → Rountree Construction Company → Mud Creek-Plant 8**

- 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:** Rountree Construction Company → Mud Creek-Plant 8; 1985-06-01 to 2002-12-09; source msha-controller-operator-history
- **controller_controls_mine:** Bill  Rountree → Mud Creek-Plant 8; 1985-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Rountree → Rountree Construction Company; 1985-06-01 to 2002-12-09; source msha-controller-operator-history
- **operator_operates_mine:** Rountree Materials, Inc. → Mud Creek-Plant 8; 2002-12-10 to 2016-05-26; source msha-controller-operator-history
- **controller_controls_mine:** Bill  Rountree → Mud Creek-Plant 8; 2002-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Rountree → Rountree Materials, Inc.; 2002-12-10 to 2016-05-26; source msha-controller-operator-history
- **operator_operates_mine:** Rountree Construction Company → Mud Creek-Plant 8; 2016-05-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Zachary  Rountree → Mud Creek-Plant 8; 2016-05-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Zachary  Rountree → Rountree Construction Company; 2016-05-27 to current/open; source msha-controller-operator-history