# Relationship history for MSHA mine 0504553

Current hierarchy: **Mystic Eagle Quarry LLC; Mystic Eagle Investors LLC → Mystic Eagle Group, LLC → Mystic Eagle Quarry**

- 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:** Congdon Robert → Mystic Eagle Quarry; 1992-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Crystal Valley Alabaster → Mystic Eagle Quarry; 1994-11-01 to 1998-07-21; source msha-controller-operator-history
- **controller_controls_operator:** Congdon Robert → Crystal Valley Alabaster; 1994-11-01 to 1998-07-21; source msha-controller-operator-history
- **operator_operates_mine:** Avalanche Creek Marble & Alabaster Llc → Mystic Eagle Quarry; 1998-07-22 to 2003-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Congdon Robert & Tom Swint → Mystic Eagle Quarry; 1998-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Congdon Robert & Tom Swint → Avalanche Creek Marble & Alabaster Llc; 1998-07-22 to 2003-05-31; source msha-controller-operator-history
- **operator_operates_mine:** White Banks Inc. → Mystic Eagle Quarry; 2003-06-01 to 2017-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Robert L  Congdon Et Al → Mystic Eagle Quarry; 2003-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert L  Congdon Et Al → White Banks Inc.; 2003-06-01 to 2017-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Julie C  Otis-Skinner Et Al → White Banks Inc.; 2003-06-01 to 2017-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Mystic Eagle Group, LLC → Mystic Eagle Quarry; 2017-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mystic Eagle Quarry LLC et al → Mystic Eagle Quarry; 2017-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mystic Eagle Quarry LLC et al → Mystic Eagle Group, LLC; 2017-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mystic Eagle Investors LLC et al → Mystic Eagle Group, LLC; 2017-02-01 to current/open; source msha-controller-operator-history