# Relationship history for MSHA mine 3607244

Current hierarchy: **Mace Dennis R → K M & K Coal Company → 14 Vein Slope**

- 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:** Mace Dennis R Et Al → 14 Vein Slope; 1974-12-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Clover Mining → 14 Vein Slope; 1981-12-01 to 1982-08-11; source msha-controller-operator-history
- **controller_controls_mine:** Shevitski James T Et Al → 14 Vein Slope; 1981-12-01 to 1982-08-11; source msha-controller-operator-history
- **controller_controls_operator:** Shevitski James T Et Al → Clover Mining; 1981-12-01 to 1982-08-11; source msha-controller-operator-history
- **operator_operates_mine:** K M & K Coal Company → 14 Vein Slope; 1982-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mace Dennis R Et Al → K M & K Coal Company; 1982-08-12 to current/open; source msha-controller-operator-history