# Relationship history for MSHA mine 2700297

Current hierarchy: **Richard  Charbonneau; Mark  Charbonneau → Pine River Aggregates → Pine River Aggregates**

- 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:** Pine River Sand & Gravel Inc → Pine River Aggregates; 1992-01-01 to 1993-07-08; source msha-controller-operator-history
- **controller_controls_mine:** Tangerini Charles B → Pine River Aggregates; 1992-01-01 to 1993-07-08; source msha-controller-operator-history
- **controller_controls_operator:** Tangerini Charles B → Pine River Sand & Gravel Inc; 1992-01-01 to 1993-07-08; source msha-controller-operator-history
- **operator_operates_mine:** Pine River Aggregates → Pine River Aggregates; 1993-07-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Charbonneau  et al → Pine River Aggregates; 1993-07-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Charbonneau  et al → Pine River Aggregates; 1993-07-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Charbonneau  et al → Pine River Aggregates; 1993-07-09 to current/open; source msha-controller-operator-history