# Relationship history for MSHA mine 2003484

Current hierarchy: **Michael  Hollingshead → SRM Materials, LLC → CT Aggregates**

- 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:** John L  Warvel → CT Aggregates; 2000-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sunrise Aggregates, LLC → CT Aggregates; 2013-09-18 to 2020-02-10; source msha-controller-operator-history
- **controller_controls_operator:** John L  Warvel → Sunrise Aggregates, LLC; 2013-09-18 to 2020-02-10; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Hollingshead et al → CT Aggregates; 2013-12-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Clinton Tecumseh Aggregates, LLC → CT Aggregates; 2020-02-11 to 2022-03-13; source msha-controller-operator-history
- **controller_controls_mine:** Joseph  Comstock et al → CT Aggregates; 2020-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Comstock et al → Clinton Tecumseh Aggregates, LLC; 2020-02-11 to 2022-03-13; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Briskey et al → Clinton Tecumseh Aggregates, LLC; 2020-02-11 to 2022-03-13; source msha-controller-operator-history
- **operator_operates_mine:** SRM Materials, LLC → CT Aggregates; 2022-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Hollingshead et al → SRM Materials, LLC; 2022-03-14 to current/open; source msha-controller-operator-history