# Relationship history for MSHA mine 4405693

Current hierarchy: **Presley Leon-Stanley Ward → K W Carbon Inc → No 2**

- 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

- **operator_operates_mine:** K W Carbon Inc → No 2; 1981-07-01 to 1982-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Whitt Carl → No 2; 1981-07-01 to 1982-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Whitt Carl → K W Carbon Inc; 1981-07-01 to 1982-04-14; source msha-controller-operator-history
- **operator_operates_mine:** K W Carbon Inc → No 2; 1982-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Presley Leon-Stanley Ward Et Al → No 2; 1982-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Presley Leon-Stanley Ward Et Al → K W Carbon Inc; 1982-04-15 to current/open; source msha-controller-operator-history