# Relationship history for MSHA mine 1701022

Current hierarchy: **Brandi B  Folsom; Jason O  Folsom → Owen J. Folsom, Inc. → Searsport Wash Plant**

- 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

- **controller_controls_mine:** Owen J  Folsom → Searsport Wash Plant; 1950-01-01 to 2026-08-15; source msha-controller-operator-history
- **operator_operates_mine:** Owen J. Folsom, Inc. → Searsport Wash Plant; 2019-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Owen J  Folsom → Owen J. Folsom, Inc.; 2019-04-13 to 2026-08-15; source msha-controller-operator-history
- **controller_controls_mine:** Jason O  Folsom et al → Searsport Wash Plant; 2026-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason O  Folsom et al → Owen J. Folsom, Inc.; 2026-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brandi B  Folsom et al → Owen J. Folsom, Inc.; 2026-08-16 to current/open; source msha-controller-operator-history