# Relationship history for MSHA mine 0404630

Current hierarchy: **Henry F  Hunte → H G Fenton Material Company → Harmony 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

- **controller_controls_mine:** Henry F  Hunte et al → Harmony Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Harmony Quarry Inc → Harmony Quarry; 1983-03-01 to 1988-04-11; source msha-controller-operator-history
- **controller_controls_mine:** Genger Richard → Harmony Quarry; 1983-03-01 to 1988-04-11; source msha-controller-operator-history
- **controller_controls_operator:** Genger Richard → Harmony Quarry Inc; 1983-03-01 to 1988-04-11; source msha-controller-operator-history
- **operator_operates_mine:** H G Fenton Material Company → Harmony Quarry; 1988-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Henry F  Hunte et al → H G Fenton Material Company; 1988-04-12 to current/open; source msha-controller-operator-history