# Relationship history for MSHA mine 1513326

Current hierarchy: **Davis Ted → T Davis Coal Company Inc → T Davis Coal Co Inc #3**

- 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:** Kelsa Corp → T Davis Coal Co Inc #3; 1982-01-01 to 1986-08-07; source msha-controller-operator-history
- **controller_controls_mine:** Sullivan Dan G-Delmer Vencill Et Al → T Davis Coal Co Inc #3; 1982-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sullivan Dan G-Delmer Vencill Et Al → Kelsa Corp; 1982-01-01 to 1986-08-07; source msha-controller-operator-history
- **controller_controls_mine:** Davis Ted → T Davis Coal Co Inc #3; 1982-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** T Davis Coal Company Inc → T Davis Coal Co Inc #3; 1986-08-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Davis Ted → T Davis Coal Company Inc; 1986-08-08 to current/open; source msha-controller-operator-history