# Relationship history for MSHA mine 4200260

Current hierarchy: **DTM USA; QCDT Holdings LLC → DT Mining LLC → DEER TRAIL**

- 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:** Marysvale Mining Company Inc → DEER TRAIL; 1950-01-01 to 1981-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Lynn  Frederick → DEER TRAIL; 1950-01-01 to 1981-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Lynn  Frederick → Marysvale Mining Company Inc; 1950-01-01 to 1981-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Noranda Inc → DEER TRAIL; 1978-03-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Noranda Exploration Inc → DEER TRAIL; 1981-06-23 to 1997-05-11; source msha-controller-operator-history
- **controller_controls_operator:** Noranda Inc → Noranda Exploration Inc; 1981-06-23 to 1997-05-11; source msha-controller-operator-history
- **operator_operates_mine:** Unico Incorporated → DEER TRAIL; 1997-05-12 to 2014-02-16; source msha-controller-operator-history
- **controller_controls_mine:** Ray C  Brown → DEER TRAIL; 1997-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ray C  Brown → Unico Incorporated; 1997-05-12 to 2014-02-16; source msha-controller-operator-history
- **operator_operates_mine:** Western Pacific Resources US → DEER TRAIL; 2014-02-17 to 2018-12-19; source msha-controller-operator-history
- **controller_controls_mine:** Western Pacific Resources → DEER TRAIL; 2014-02-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Western Pacific Resources → Western Pacific Resources US; 2014-02-17 to 2018-12-19; source msha-controller-operator-history
- **operator_operates_mine:** DT Mining LLC → DEER TRAIL; 2018-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** DTM USA et al → DEER TRAIL; 2018-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** DTM USA et al → DT Mining LLC; 2018-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** QCDT Holdings LLC et al → DT Mining LLC; 2018-12-20 to current/open; source msha-controller-operator-history