# Relationship history for MSHA mine 0302068

Current hierarchy: **David  Love → Timber Rock Quarry LLC → Timber Rock Quarry LLC**

- 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:** Timber Rock Quarry LLC → Timber Rock Quarry LLC; 2019-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David  Love et al → Timber Rock Quarry LLC; 2019-07-13 to 2020-04-28; source msha-controller-operator-history
- **controller_controls_operator:** David  Love et al → Timber Rock Quarry LLC; 2019-07-13 to 2020-04-28; source msha-controller-operator-history
- **controller_controls_operator:** Curtis  Billingsley et al → Timber Rock Quarry LLC; 2019-07-13 to 2020-04-28; source msha-controller-operator-history
- **controller_controls_mine:** David  Love → Timber Rock Quarry LLC; 2020-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Love → Timber Rock Quarry LLC; 2020-04-29 to current/open; source msha-controller-operator-history