# Relationship history for MSHA mine 2700288

Current hierarchy: **Paul  Savard → Enfield Granite Company → ENFIELD GRANITE CO.**

- 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:** Browning Engineering → ENFIELD GRANITE CO.; 1990-01-01 to 1991-07-21; source msha-controller-operator-history
- **controller_controls_mine:** James A  Browning → ENFIELD GRANITE CO.; 1990-01-01 to 1991-07-21; source msha-controller-operator-history
- **controller_controls_operator:** James A  Browning → Browning Engineering; 1990-01-01 to 1991-07-21; source msha-controller-operator-history
- **operator_operates_mine:** Enfield Granite Company → ENFIELD GRANITE CO.; 1991-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Paul  Savard → ENFIELD GRANITE CO.; 1991-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Savard → Enfield Granite Company; 1991-07-22 to current/open; source msha-controller-operator-history