# Relationship history for MSHA mine 2401524

Current hierarchy: **Philip M  McDonald → McDonald Excavation Inc → Mammoth 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

- **operator_operates_mine:** R O G K Inc → Mammoth Mine; 1980-03-01 to 1982-03-07; source msha-controller-operator-history
- **controller_controls_mine:** R O G K Inc → Mammoth Mine; 1980-03-01 to 1982-03-07; source msha-controller-operator-history
- **controller_controls_operator:** R O G K Inc → R O G K Inc; 1980-03-01 to 1982-03-07; source msha-controller-operator-history
- **operator_operates_mine:** South Boulder Mining Corp → Mammoth Mine; 1982-03-08 to 2012-12-18; source msha-controller-operator-history
- **controller_controls_mine:** Von Kleist Robert → Mammoth Mine; 1982-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Von Kleist Robert → South Boulder Mining Corp; 1982-03-08 to 2012-12-18; source msha-controller-operator-history
- **controller_controls_mine:** Philip M  McDonald → Mammoth Mine; 2003-10-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Excelsior Mining → Mammoth Mine; 2012-12-19 to 2014-02-09; source msha-controller-operator-history
- **controller_controls_mine:** Paul  Antonioli → Mammoth Mine; 2012-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Antonioli → Excelsior Mining; 2012-12-19 to 2014-02-09; source msha-controller-operator-history
- **operator_operates_mine:** McDonald Excavation Inc → Mammoth Mine; 2014-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Philip M  McDonald → McDonald Excavation Inc; 2014-02-10 to current/open; source msha-controller-operator-history