# Relationship history for MSHA mine 4605170

Current hierarchy: **Mc Clung S Gene → K & M Coal Company → No 5 Mine**

- 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

- **controller_controls_mine:** Mc Million Virgil & Johnnie Kessler → No 5 Mine; 1975-12-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** K & M Coal Company → No 5 Mine; 1976-05-12 to 1977-04-28; source msha-controller-operator-history
- **controller_controls_operator:** Mc Million Virgil & Johnnie Kessler → K & M Coal Company; 1976-05-12 to 1977-04-28; source msha-controller-operator-history
- **operator_operates_mine:** K & M Coal Company → No 5 Mine; 1977-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Clung S Gene → No 5 Mine; 1977-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Clung S Gene → K & M Coal Company; 1977-04-29 to current/open; source msha-controller-operator-history