# Relationship history for MSHA mine 4604508

Current hierarchy: **Mounts Jimmy-Jerry Cline → Kristi Ann Coal Inc → No 6**

- 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:** Bartram & Gunnells → No 6; 1975-01-14 to 1975-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Bartram & Gunnells → No 6; 1975-01-14 to 1975-06-18; source msha-controller-operator-history
- **controller_controls_operator:** Bartram & Gunnells → Bartram & Gunnells; 1975-01-14 to 1975-06-18; source msha-controller-operator-history
- **operator_operates_mine:** Davin Mining Inc → No 6; 1975-06-19 to 1980-06-24; source msha-controller-operator-history
- **controller_controls_mine:** Brown Larry M → No 6; 1975-06-19 to 1980-06-24; source msha-controller-operator-history
- **controller_controls_operator:** Brown Larry M → Davin Mining Inc; 1975-06-19 to 1980-06-24; source msha-controller-operator-history
- **controller_controls_mine:** Stepp Gale B → No 6; 1977-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Davin Mining Inc → No 6; 1980-06-25 to 1982-02-18; source msha-controller-operator-history
- **controller_controls_mine:** Workman William F → No 6; 1980-06-25 to 1982-02-18; source msha-controller-operator-history
- **controller_controls_operator:** Workman William F → Davin Mining Inc; 1980-06-25 to 1982-02-18; source msha-controller-operator-history
- **controller_controls_mine:** Mounts Jimmy-Jerry Cline Et Al → No 6; 1981-09-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pine Tree Coal Company → No 6; 1982-02-19 to 1983-12-04; source msha-controller-operator-history
- **controller_controls_operator:** Stepp Gale B → Pine Tree Coal Company; 1982-02-19 to 1983-12-04; source msha-controller-operator-history
- **operator_operates_mine:** Mar-Mac Coal Company Inc → No 6; 1983-12-05 to 1986-01-16; source msha-controller-operator-history
- **controller_controls_mine:** Marcum Willis → No 6; 1983-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marcum Willis → Mar-Mac Coal Company Inc; 1983-12-05 to 1986-01-16; source msha-controller-operator-history
- **operator_operates_mine:** Kristi Ann Coal Inc → No 6; 1986-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mounts Jimmy-Jerry Cline Et Al → Kristi Ann Coal Inc; 1986-01-17 to current/open; source msha-controller-operator-history