# Relationship history for MSHA mine 4604536

Current hierarchy: **Mc Dorman Richard E → Sewell Mining Associates → Hewett Fork No 1a**

- 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:** Lucas Edsel L → Hewett Fork No 1a; 1950-01-01 to 1976-12-17; source msha-controller-operator-history
- **operator_operates_mine:** Lobo Inc → Hewett Fork No 1a; 1975-03-06 to 1976-03-25; source msha-controller-operator-history
- **controller_controls_mine:** Fry Andrew J → Hewett Fork No 1a; 1975-03-06 to 1976-03-25; source msha-controller-operator-history
- **controller_controls_operator:** Fry Andrew J → Lobo Inc; 1975-03-06 to 1976-03-25; source msha-controller-operator-history
- **operator_operates_mine:** S S Joe Burford Inc → Hewett Fork No 1a; 1976-03-26 to 1976-12-17; source msha-controller-operator-history
- **controller_controls_operator:** Lucas Edsel L → S S Joe Burford Inc; 1976-03-26 to 1976-12-17; source msha-controller-operator-history
- **controller_controls_mine:** Valley Industries Inc → Hewett Fork No 1a; 1976-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S S Joe Burford Inc → Hewett Fork No 1a; 1976-12-18 to 1978-07-24; source msha-controller-operator-history
- **controller_controls_operator:** Valley Industries Inc → S S Joe Burford Inc; 1976-12-18 to 1978-07-24; source msha-controller-operator-history
- **operator_operates_mine:** Micinde Coal Company → Hewett Fork No 1a; 1978-07-25 to 1980-10-31; source msha-controller-operator-history
- **controller_controls_mine:** La Master James M → Hewett Fork No 1a; 1978-07-25 to 1980-10-31; source msha-controller-operator-history
- **controller_controls_operator:** La Master James M → Micinde Coal Company; 1978-07-25 to 1980-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Four-D Mining Company Inc → Hewett Fork No 1a; 1980-11-01 to 1981-09-17; source msha-controller-operator-history
- **controller_controls_mine:** Lassinger Paul → Hewett Fork No 1a; 1980-11-01 to 1981-09-17; source msha-controller-operator-history
- **controller_controls_operator:** Lassinger Paul → Four-D Mining Company Inc; 1980-11-01 to 1981-09-17; source msha-controller-operator-history
- **operator_operates_mine:** Sewell Mining Associates → Hewett Fork No 1a; 1981-09-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Dorman Richard E → Hewett Fork No 1a; 1981-09-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Dorman Richard E → Sewell Mining Associates; 1981-09-18 to current/open; source msha-controller-operator-history