# Relationship history for MSHA mine 1700406

Current hierarchy: **Conary H A → H A Conary → Appletton Pit**

- 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:** Appleton Gravel Inc → Appletton Pit; 1950-01-01 to 1980-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Gushee Joel → Appletton Pit; 1950-01-01 to 1980-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Gushee Joel → Appleton Gravel Inc; 1950-01-01 to 1980-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Appleton Sand & Gravel → Appletton Pit; 1980-07-01 to 1984-05-29; source msha-controller-operator-history
- **controller_controls_mine:** Evans Clifford D → Appletton Pit; 1980-07-01 to 1984-05-29; source msha-controller-operator-history
- **controller_controls_operator:** Evans Clifford D → Appleton Sand & Gravel; 1980-07-01 to 1984-05-29; source msha-controller-operator-history
- **operator_operates_mine:** H A Conary → Appletton Pit; 1984-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Conary H A → Appletton Pit; 1984-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Conary H A → H A Conary; 1984-05-30 to current/open; source msha-controller-operator-history