# Relationship history for MSHA mine 3304485

Current hierarchy: **National Lime & Stone Co. → The National Lime and Stone Company → Newcomerstown**

- 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:** National Lime & Stone Co. → Newcomerstown; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Shady Bend Sand & Gravel Inc. → Newcomerstown; 2001-10-01 to 2015-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Daniel O  Miller → Newcomerstown; 2001-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel O  Miller → Shady Bend Sand & Gravel Inc.; 2001-10-01 to 2015-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Clark et al → Newcomerstown; 2010-07-01 to 2017-12-14; source msha-controller-operator-history
- **operator_operates_mine:** Clark Clay Co → Newcomerstown; 2015-04-15 to 2025-03-30; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Clark et al → Clark Clay Co; 2015-04-15 to 2017-12-14; source msha-controller-operator-history
- **controller_controls_operator:** Chad  Clark et al → Clark Clay Co; 2015-04-15 to 2017-12-14; source msha-controller-operator-history
- **controller_controls_mine:** Chad C  Clark → Newcomerstown; 2017-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chad C  Clark → Clark Clay Co; 2017-12-15 to 2025-03-30; source msha-controller-operator-history
- **operator_operates_mine:** The National Lime and Stone Company → Newcomerstown; 2025-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** National Lime & Stone Co. → The National Lime and Stone Company; 2025-03-31 to current/open; source msha-controller-operator-history