# Relationship history for MSHA mine 0403549

Current hierarchy: **Jiles O J → O J Jiles Excavating & Grading → Marble Valley Limestone 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Sutherland Construction Inc → Marble Valley Limestone Quarry; 1950-01-01 to 1978-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Sutherland Jerry → Marble Valley Limestone Quarry; 1950-01-01 to 1978-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Sutherland Jerry → Sutherland Construction Inc; 1950-01-01 to 1978-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Western Geo Tech → Marble Valley Limestone Quarry; 1978-10-01 to 1979-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Crite Earl → Marble Valley Limestone Quarry; 1978-10-01 to 1979-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Crite Earl → Western Geo Tech; 1978-10-01 to 1979-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Edgewood Enterprises Inc → Marble Valley Limestone Quarry; 1979-06-01 to 1981-07-05; source msha-controller-operator-history
- **controller_controls_mine:** Hammond Nathan → Marble Valley Limestone Quarry; 1979-06-01 to 1981-07-05; source msha-controller-operator-history
- **controller_controls_operator:** Hammond Nathan → Edgewood Enterprises Inc; 1979-06-01 to 1981-07-05; source msha-controller-operator-history
- **operator_operates_mine:** O J Jiles Excavating & Grading → Marble Valley Limestone Quarry; 1981-07-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jiles O J → Marble Valley Limestone Quarry; 1981-07-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jiles O J → O J Jiles Excavating & Grading; 1981-07-06 to current/open; source msha-controller-operator-history