# Relationship history for MSHA mine 1102752

Current hierarchy: **ACNR Holdings, Inc → Illinois Land Resources, Inc. → New Era Mine**

- 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:** Kerr McGee Corp → New Era Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kerr-Mc Gee Coal Corp → New Era Mine; 1980-11-01 to 1998-06-17; source msha-controller-operator-history
- **controller_controls_operator:** Kerr McGee Corp → Kerr-Mc Gee Coal Corp; 1980-11-01 to 1998-06-17; source msha-controller-operator-history
- **operator_operates_mine:** Illnois Land Resources, Inc. → New Era Mine; 1998-06-18 to 2020-09-16; source msha-controller-operator-history
- **controller_controls_mine:** Robert E  Murray → New Era Mine; 1998-06-18 to 2020-09-16; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Murray → Illnois Land Resources, Inc.; 1998-06-18 to 2020-09-16; source msha-controller-operator-history
- **controller_controls_mine:** ACNR Holdings, Inc → New Era Mine; 2020-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** ACNR Holdings, Inc → Illnois Land Resources, Inc.; 2020-09-17 to 2020-09-16; source msha-controller-operator-history
- **operator_operates_mine:** Illinois Land Resources, Inc. → New Era Mine; 2020-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** ACNR Holdings, Inc → Illinois Land Resources, Inc.; 2020-09-17 to current/open; source msha-controller-operator-history