# Relationship history for MSHA mine 3002727

Current hierarchy: **Heidelberg Materials AG → Heidelberg Materials Northeast - LLC → DRYDEN 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:** Roy D  Reeves → DRYDEN PIT; 1985-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R M S Gravel Inc → DRYDEN PIT; 1986-04-01 to 2023-04-03; source msha-controller-operator-history
- **controller_controls_operator:** Roy D  Reeves → R M S Gravel Inc; 1986-04-01 to 2023-04-03; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → DRYDEN PIT; 1988-11-14 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → DRYDEN PIT; 2007-08-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Heidelberg Materials Northeast - NY LLC → DRYDEN PIT; 2023-04-04 to 2025-05-18; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Heidelberg Materials Northeast - NY LLC; 2023-04-04 to 2025-05-18; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Heidelberg Materials Northeast - NY LLC; 2023-04-04 to 2007-08-22; source msha-controller-operator-history
- **operator_operates_mine:** Heidelberg Materials Northeast - LLC → DRYDEN PIT; 2025-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Heidelberg Materials Northeast - LLC; 2025-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Heidelberg Materials Northeast - LLC; 2025-05-19 to 2007-08-22; source msha-controller-operator-history