# Relationship history for MSHA mine 1102759

Current hierarchy: **Justin A Quaka → Seneca Sand LLC. → Seneca Sand 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Martin J  Spicer → Seneca Sand LLC; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Spicer Gravel Company  Inc → Seneca Sand LLC; 1981-01-01 to 2018-05-15; source msha-controller-operator-history
- **controller_controls_operator:** Martin J  Spicer → Spicer Gravel Company  Inc; 1981-01-01 to 2018-05-15; source msha-controller-operator-history
- **operator_operates_mine:** Seneca Sand LLC. → Seneca Sand LLC; 2018-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Justin A Quaka → Seneca Sand LLC; 2018-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justin A Quaka → Seneca Sand LLC.; 2018-05-16 to current/open; source msha-controller-operator-history