# Relationship history for MSHA mine 1800719

Current hierarchy: **Aggregate Management, Inc → Allegany Aggregates Inc → BEDROCK 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Wocap Energy Resources Inc → BEDROCK QUARRY; 1988-05-01 to 1989-12-28; source msha-controller-operator-history
- **controller_controls_mine:** James T  Mattingly → BEDROCK QUARRY; 1988-05-01 to 1989-12-28; source msha-controller-operator-history
- **controller_controls_operator:** James T  Mattingly → Wocap Energy Resources Inc; 1988-05-01 to 1989-12-28; source msha-controller-operator-history
- **operator_operates_mine:** Allegany Aggregates Inc → BEDROCK QUARRY; 1989-12-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Allegany Aggregates Inc → BEDROCK QUARRY; 1989-12-29 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Allegany Aggregates Inc → Allegany Aggregates Inc; 1989-12-29 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Management, Inc → BEDROCK QUARRY; 2016-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Management, Inc → Allegany Aggregates Inc; 2016-01-01 to current/open; source msha-controller-operator-history