# Relationship history for MSHA mine 3503343

Current hierarchy: **Joseph G  Pilling → PRRI inc → PRRI Inc.**

- 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:** Territorial Rock Products Inc → PRRI Inc.; 1990-03-01 to 2006-01-22; source msha-controller-operator-history
- **controller_controls_mine:** C  Moug → PRRI Inc.; 1990-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** C  Moug → Territorial Rock Products Inc; 1990-03-01 to 2006-01-22; source msha-controller-operator-history
- **operator_operates_mine:** Precision Aggregate Products Inc → PRRI Inc.; 2006-01-23 to 2019-02-06; source msha-controller-operator-history
- **controller_controls_mine:** Joseph G  Pilling → PRRI Inc.; 2006-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph G  Pilling → Precision Aggregate Products Inc; 2006-01-23 to 2019-02-06; source msha-controller-operator-history
- **operator_operates_mine:** PRRI inc → PRRI Inc.; 2019-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Matthew J Pilling → PRRI Inc.; 2019-02-07 to 2021-03-27; source msha-controller-operator-history
- **controller_controls_operator:** Matthew J Pilling → PRRI inc; 2019-02-07 to 2021-03-27; source msha-controller-operator-history
- **controller_controls_mine:** Joseph G  Pilling → PRRI Inc.; 2021-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph G  Pilling → PRRI inc; 2021-03-28 to current/open; source msha-controller-operator-history