# Relationship history for MSHA mine 1202479

Current hierarchy: **Aaron  Thieret; Kevin  Thieret → Earthworks, Inc. → Earthworks Quarry Site #7**

- 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

- **controller_controls_mine:** Kevin J  Thieret  et al → Earthworks Quarry Site #7; 1998-09-01 to 2018-03-31; source msha-controller-operator-history
- **operator_operates_mine:** P.E.M Enterprises LLC → Earthworks Quarry Site #7; 2016-10-12 to 2019-07-28; source msha-controller-operator-history
- **controller_controls_mine:** David  Abner et al → Earthworks Quarry Site #7; 2016-10-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Abner et al → P.E.M Enterprises LLC; 2016-10-12 to 2019-07-28; source msha-controller-operator-history
- **controller_controls_operator:** Pleas  Abner et al → P.E.M Enterprises LLC; 2016-10-12 to 2019-07-28; source msha-controller-operator-history
- **controller_controls_mine:** Kevin  Thieret et al → Earthworks Quarry Site #7; 2018-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Earthworks, Inc. → Earthworks Quarry Site #7; 2019-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin  Thieret et al → Earthworks, Inc.; 2019-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aaron  Thieret et al → Earthworks, Inc.; 2019-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin J  Thieret  et al → Earthworks, Inc.; 2019-07-29 to 2018-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Ned S  Stanley  et al → Earthworks, Inc.; 2019-07-29 to 2018-03-31; source msha-controller-operator-history