# Relationship history for MSHA mine 4602440

Current hierarchy: **Thompson Rodman E → Phoenix Lumber Company → 17 Preparation Plant**

- 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:** Elmore Robert → 17 Preparation Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Island Creek Coal Company → 17 Preparation Plant; 1950-01-01 to 1975-07-02; source msha-controller-operator-history
- **controller_controls_mine:** Occidental Petroleum Corp → 17 Preparation Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Occidental Petroleum Corp → Island Creek Coal Company; 1950-01-01 to 1975-07-02; source msha-controller-operator-history
- **operator_operates_mine:** Red Jacket Coal Company Inc → 17 Preparation Plant; 1975-07-03 to 1977-03-21; source msha-controller-operator-history
- **controller_controls_operator:** Elmore Robert → Red Jacket Coal Company Inc; 1975-07-03 to 1977-03-21; source msha-controller-operator-history
- **operator_operates_mine:** Pioneer-Harrison Mining Company Inc → 17 Preparation Plant; 1977-03-22 to 1977-11-01; source msha-controller-operator-history
- **controller_controls_mine:** Hurn Franklin M & Raymond A Smego → 17 Preparation Plant; 1977-03-22 to 1979-12-20; source msha-controller-operator-history
- **controller_controls_operator:** Hurn Franklin M & Raymond A Smego → Pioneer-Harrison Mining Company Inc; 1977-03-22 to 1977-11-01; source msha-controller-operator-history
- **operator_operates_mine:** Red Jacket Coal Company Inc → 17 Preparation Plant; 1977-11-02 to 1979-03-11; source msha-controller-operator-history
- **controller_controls_operator:** Elmore Robert → Red Jacket Coal Company Inc; 1977-11-02 to 1979-03-11; source msha-controller-operator-history
- **operator_operates_mine:** R N Coal Company Inc → 17 Preparation Plant; 1979-03-12 to 1980-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Leander → 17 Preparation Plant; 1979-03-12 to 1980-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Leander → R N Coal Company Inc; 1979-03-12 to 1980-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Mitchell Iverson → 17 Preparation Plant; 1979-12-21 to 1983-02-15; source msha-controller-operator-history
- **operator_operates_mine:** Mitchell Energy Corp → 17 Preparation Plant; 1980-02-29 to 1983-01-02; source msha-controller-operator-history
- **controller_controls_operator:** Mitchell Iverson → Mitchell Energy Corp; 1980-02-29 to 1983-01-02; source msha-controller-operator-history
- **operator_operates_mine:** Mabley Coal Company Inc → 17 Preparation Plant; 1983-01-03 to 1984-11-13; source msha-controller-operator-history
- **controller_controls_mine:** Elmore Robert → 17 Preparation Plant; 1983-01-03 to 1984-11-13; source msha-controller-operator-history
- **controller_controls_operator:** Elmore Robert → Mabley Coal Company Inc; 1983-01-03 to 1984-11-13; source msha-controller-operator-history
- **operator_operates_mine:** Intercontinental Ventures Corp → 17 Preparation Plant; 1984-11-14 to 1989-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Allied Resources Corp → 17 Preparation Plant; 1984-11-14 to 1989-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Allied Resources Corp → Intercontinental Ventures Corp; 1984-11-14 to 1989-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Phoenix Lumber Company → 17 Preparation Plant; 1989-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thompson Rodman E → 17 Preparation Plant; 1989-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thompson Rodman E → Phoenix Lumber Company; 1989-09-01 to current/open; source msha-controller-operator-history