# Relationship history for MSHA mine 2301461

Current hierarchy: **Lionmark Construction Companies LLC → Indian Creek Materials → Houston  Quarry**

- 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:** Doss & Harper Stone Company Inc → Houston  Quarry; 1950-01-01 to 2019-05-11; source msha-controller-operator-history
- **controller_controls_mine:** Betty L  Harper → Houston  Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Betty L  Harper → Doss & Harper Stone Company Inc; 1950-01-01 to 2019-05-11; source msha-controller-operator-history
- **controller_controls_mine:** Lionmark Construction Companies LLC → Houston  Quarry; 2019-02-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Indian Creek Materials → Houston  Quarry; 2019-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lionmark Construction Companies LLC → Indian Creek Materials; 2019-05-12 to current/open; source msha-controller-operator-history