# Relationship history for MSHA mine 3401531

Current hierarchy: **Ashcraft Charles → O C & W Corp → Pollyanna #3**

- 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:** K & O Mining Company Inc → Pollyanna #3; 1985-09-01 to 1986-07-13; source msha-controller-operator-history
- **controller_controls_mine:** Chaney Charles W → Pollyanna #3; 1985-09-01 to 1986-07-13; source msha-controller-operator-history
- **controller_controls_operator:** Chaney Charles W → K & O Mining Company Inc; 1985-09-01 to 1986-07-13; source msha-controller-operator-history
- **operator_operates_mine:** O C & W Corp → Pollyanna #3; 1986-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ashcraft Charles → Pollyanna #3; 1986-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashcraft Charles → O C & W Corp; 1986-07-14 to current/open; source msha-controller-operator-history