# Relationship history for MSHA mine 4405095

Current hierarchy: **Mc Fee Carl → Dabco Fuel Inc → Mudlick No 1**

- 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:** Dabco Fuel Company Inc → Mudlick No 1; 1978-09-01 to 1980-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Bill G  Humphreys → Mudlick No 1; 1978-09-01 to 1980-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Bill G  Humphreys → Dabco Fuel Company Inc; 1978-09-01 to 1980-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Dabco Fuel Company Inc → Mudlick No 1; 1980-08-01 to 1982-07-28; source msha-controller-operator-history
- **controller_controls_mine:** Humphreys Bill-N B Lambert Et Al → Mudlick No 1; 1980-08-01 to 1982-07-28; source msha-controller-operator-history
- **controller_controls_operator:** Humphreys Bill-N B Lambert Et Al → Dabco Fuel Company Inc; 1980-08-01 to 1982-07-28; source msha-controller-operator-history
- **operator_operates_mine:** Dabco Fuel Inc → Mudlick No 1; 1982-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Fee Carl → Mudlick No 1; 1982-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Fee Carl → Dabco Fuel Inc; 1982-07-29 to current/open; source msha-controller-operator-history