# Relationship history for MSHA mine 3002783

Current hierarchy: **Anthony J.  Gilbert; Donald L.  Snyder → Parishville Sand & Gravel Inc. → Parishville 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

- **controller_controls_mine:** Theodore  Zoli → Parishville Pit; 1980-04-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Torrington Sand & Stone → Parishville Pit; 1987-04-01 to 2009-05-04; source msha-controller-operator-history
- **controller_controls_operator:** Theodore  Zoli → Torrington Sand & Stone; 1987-04-01 to 2009-05-04; source msha-controller-operator-history
- **operator_operates_mine:** Parishville Sand & Gravel Inc. → Parishville Pit; 2009-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donald L.  Snyder et al → Parishville Pit; 2009-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald L.  Snyder et al → Parishville Sand & Gravel Inc.; 2009-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anthony J.  Gilbert et al → Parishville Sand & Gravel Inc.; 2009-05-05 to current/open; source msha-controller-operator-history