# Relationship history for MSHA mine 3003085

Current hierarchy: **Stephen M Young → PLATTERKILL MINE LLC → PLATTERKILL SAND & GRAVEL**

- 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:** Platterkill Sand & Gravel, Inc. → PLATTERKILL SAND & GRAVEL; 1993-08-01 to 2017-01-31; source msha-controller-operator-history
- **controller_controls_mine:** David W  Hallock et al → PLATTERKILL SAND & GRAVEL; 1993-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David W  Hallock et al → Platterkill Sand & Gravel, Inc.; 1993-08-01 to 2017-01-31; source msha-controller-operator-history
- **operator_operates_mine:** SM Young Construction LLC → PLATTERKILL SAND & GRAVEL; 2017-02-01 to 2017-10-03; source msha-controller-operator-history
- **controller_controls_mine:** Stephen M Young → PLATTERKILL SAND & GRAVEL; 2017-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen M Young → SM Young Construction LLC; 2017-02-01 to 2017-10-03; source msha-controller-operator-history
- **operator_operates_mine:** Platterkill Mine LLC → PLATTERKILL SAND & GRAVEL; 2017-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stephen M Young → PLATTERKILL SAND & GRAVEL; 2017-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen M Young → Platterkill Mine LLC; 2017-10-04 to current/open; source msha-controller-operator-history