# Relationship history for MSHA mine 4608031

Current hierarchy: **Endicott Shelby R → Gray Wolf Mining Company → Gray Wolf Iii**

- 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:** Compton Kennie D → Gray Wolf Iii; 1986-10-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** War Eagle Construction Company Inc → Gray Wolf Iii; 1991-04-01 to 1992-08-20; source msha-controller-operator-history
- **controller_controls_operator:** Compton Kennie D → War Eagle Construction Company Inc; 1991-04-01 to 1992-08-20; source msha-controller-operator-history
- **operator_operates_mine:** City Enterprises Coal Corp → Gray Wolf Iii; 1992-08-21 to 1992-09-24; source msha-controller-operator-history
- **controller_controls_mine:** Insana Peter B → Gray Wolf Iii; 1992-08-21 to 1992-09-24; source msha-controller-operator-history
- **controller_controls_operator:** Insana Peter B → City Enterprises Coal Corp; 1992-08-21 to 1992-09-24; source msha-controller-operator-history
- **operator_operates_mine:** Fairbanks Coal Company → Gray Wolf Iii; 1992-09-25 to 1994-03-15; source msha-controller-operator-history
- **controller_controls_mine:** Browning Woodrow L → Gray Wolf Iii; 1992-09-25 to 1994-03-15; source msha-controller-operator-history
- **controller_controls_operator:** Browning Woodrow L → Fairbanks Coal Company; 1992-09-25 to 1994-03-15; source msha-controller-operator-history
- **controller_controls_mine:** Endicott Shelby R → Gray Wolf Iii; 1993-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gray Wolf Mining Company → Gray Wolf Iii; 1994-03-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Endicott Shelby R → Gray Wolf Mining Company; 1994-03-16 to current/open; source msha-controller-operator-history