# Relationship history for MSHA mine 3603248

Current hierarchy: **Quintana Capital Group GP Ltd → Rox Coal Inc. → Longview 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Delta Mining Inc → Longview Mine; 1950-01-01 to 1976-12-01; source msha-controller-operator-history
- **controller_controls_mine:** C Kenneth  Crotsley → Longview Mine; 1950-01-01 to 1976-12-01; source msha-controller-operator-history
- **controller_controls_operator:** C Kenneth  Crotsley → Delta Mining Inc; 1950-01-01 to 1976-12-01; source msha-controller-operator-history
- **controller_controls_mine:** Berwind Corporation → Longview Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Delta Mining Inc → Longview Mine; 1976-12-02 to 1977-02-13; source msha-controller-operator-history
- **controller_controls_mine:** Marmon Group Inc → Longview Mine; 1976-12-02 to 1977-02-13; source msha-controller-operator-history
- **controller_controls_operator:** Marmon Group Inc → Delta Mining Inc; 1976-12-02 to 1977-02-13; source msha-controller-operator-history
- **operator_operates_mine:** Mark Mining Inc → Longview Mine; 1977-02-14 to 1980-06-15; source msha-controller-operator-history
- **controller_controls_mine:** Fetterolf Group Inc → Longview Mine; 1977-02-14 to 1980-06-15; source msha-controller-operator-history
- **controller_controls_operator:** Fetterolf Group Inc → Mark Mining Inc; 1977-02-14 to 1980-06-15; source msha-controller-operator-history
- **operator_operates_mine:** Reitz Coal Company → Longview Mine; 1980-06-16 to 1983-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Berwind Corporation → Reitz Coal Company; 1980-06-16 to 1983-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Reitz Coal Company → Longview Mine; 1983-07-01 to 1991-01-29; source msha-controller-operator-history
- **controller_controls_mine:** Old Devon Inc et al → Longview Mine; 1983-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Old Devon Inc et al → Reitz Coal Company; 1983-07-01 to 1991-01-29; source msha-controller-operator-history
- **controller_controls_operator:** S C Coal Corporation et al → Reitz Coal Company; 1983-07-01 to 1991-01-29; source msha-controller-operator-history
- **controller_controls_mine:** NSM PLC → Longview Mine; 1990-06-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rox Coal Inc → Longview Mine; 1991-01-30 to 1998-03-05; source msha-controller-operator-history
- **controller_controls_operator:** NSM PLC → Rox Coal Inc; 1991-01-30 to 1998-03-05; source msha-controller-operator-history
- **operator_operates_mine:** Rox Coal Inc. → Longview Mine; 1998-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Severstal Resources → Longview Mine; 1998-03-06 to 2014-08-19; source msha-controller-operator-history
- **controller_controls_operator:** Severstal Resources → Rox Coal Inc.; 1998-03-06 to 2014-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Quintana Capital Group GP Ltd et al → Longview Mine; 2014-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Quintana Capital Group GP Ltd et al → Rox Coal Inc.; 2014-08-20 to current/open; source msha-controller-operator-history