# Relationship history for MSHA mine 4607221

Current hierarchy: **Hewitt Clair → Hamrick Run Coal Company → Hamrick Run Coal Co #2**

- 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:** Sigler Walter W Et Al → Hamrick Run Coal Co #2; 1982-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hamrick Run Coal Company → Hamrick Run Coal Co #2; 1986-10-01 to 1988-02-16; source msha-controller-operator-history
- **controller_controls_mine:** Hewitt Clair → Hamrick Run Coal Co #2; 1986-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hewitt Clair → Hamrick Run Coal Company; 1986-10-01 to 1988-02-16; source msha-controller-operator-history
- **operator_operates_mine:** L & O Coal Company Inc → Hamrick Run Coal Co #2; 1988-02-17 to 1988-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Short Denver Jr → Hamrick Run Coal Co #2; 1988-02-17 to 1988-05-03; source msha-controller-operator-history
- **controller_controls_operator:** Short Denver Jr → L & O Coal Company Inc; 1988-02-17 to 1988-05-03; source msha-controller-operator-history
- **operator_operates_mine:** Jodie Mining Inc → Hamrick Run Coal Co #2; 1988-05-04 to 1988-06-05; source msha-controller-operator-history
- **controller_controls_operator:** Sigler Walter W Et Al → Jodie Mining Inc; 1988-05-04 to 1988-06-05; source msha-controller-operator-history
- **operator_operates_mine:** Hamrick Run Coal Company Inc → Hamrick Run Coal Co #2; 1988-06-06 to 1989-10-29; source msha-controller-operator-history
- **controller_controls_mine:** Sears Casey & Emery Smallman → Hamrick Run Coal Co #2; 1988-06-06 to 1989-10-29; source msha-controller-operator-history
- **controller_controls_operator:** Sears Casey & Emery Smallman → Hamrick Run Coal Company Inc; 1988-06-06 to 1989-10-29; source msha-controller-operator-history
- **operator_operates_mine:** Hamrick Run Coal Company → Hamrick Run Coal Co #2; 1989-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hewitt Clair → Hamrick Run Coal Company; 1989-10-30 to current/open; source msha-controller-operator-history