# Relationship history for MSHA mine 4202548

Current hierarchy: **Tom  Howcroft → AMERI-CAN ONYX MINING, LLC → HONEYCOMB 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:** Shamrock Mining Associates LLC → HONEYCOMB MINE; 2010-04-12 to 2014-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Floyd M  Anderson et al → HONEYCOMB MINE; 2010-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Floyd M  Anderson et al → Shamrock Mining Associates LLC; 2010-04-12 to 2014-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Jack  Kaleel et al → Shamrock Mining Associates LLC; 2010-04-12 to 2014-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Shamrock Operating Group, Inc → HONEYCOMB MINE; 2015-01-01 to 2017-08-15; source msha-controller-operator-history
- **controller_controls_mine:** Chris L  Anderson et al → HONEYCOMB MINE; 2015-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris L  Anderson et al → Shamrock Operating Group, Inc; 2015-01-01 to 2017-08-15; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Donion et al → Shamrock Operating Group, Inc; 2015-01-01 to 2017-08-15; source msha-controller-operator-history
- **operator_operates_mine:** Ameri-can Onyx Mining, LLC → HONEYCOMB MINE; 2017-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tom  Howcroft → HONEYCOMB MINE; 2017-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tom  Howcroft → Ameri-can Onyx Mining, LLC; 2017-08-16 to current/open; source msha-controller-operator-history