# Relationship history for MSHA mine 1901057

Current hierarchy: **Perley  Felton → Felton Construction Company Inc → FELTON 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

- **operator_operates_mine:** Felton Construction Company Inc → FELTON PIT; 1998-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Perley  Felton → FELTON PIT; 1998-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Perley  Felton → Felton Construction Company Inc; 1998-04-01 to current/open; source msha-controller-operator-history