# Relationship history for MSHA mine 1513418

Current hierarchy: **Jeffery S.  Kinser → BIG SANDY RESOURCES INC → DREDGE #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:** Maynard Branch Dredging Company Inc → DREDGE #1; 1982-03-01 to 1985-08-25; source msha-controller-operator-history
- **controller_controls_mine:** Carl  Kirk et al → DREDGE #1; 1982-03-01 to 1985-08-25; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Kirk et al → Maynard Branch Dredging Company Inc; 1982-03-01 to 1985-08-25; source msha-controller-operator-history
- **operator_operates_mine:** Maynard'S Branch Dredge → DREDGE #1; 1985-08-26 to 1988-01-05; source msha-controller-operator-history
- **controller_controls_mine:** William F  Blackburn III → DREDGE #1; 1985-08-26 to 1988-01-05; source msha-controller-operator-history
- **controller_controls_operator:** William F  Blackburn III → Maynard'S Branch Dredge; 1985-08-26 to 1988-01-05; source msha-controller-operator-history
- **operator_operates_mine:** Maynards Branch Dredge → DREDGE #1; 1988-01-06 to 1988-11-27; source msha-controller-operator-history
- **controller_controls_mine:** John L  Sexton → DREDGE #1; 1988-01-06 to 1988-11-27; source msha-controller-operator-history
- **controller_controls_operator:** John L  Sexton → Maynards Branch Dredge; 1988-01-06 to 1988-11-27; source msha-controller-operator-history
- **operator_operates_mine:** Big Sandy Resources Inc → DREDGE #1; 1988-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeffery S.  Kinser → DREDGE #1; 1988-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery S.  Kinser → Big Sandy Resources Inc; 1988-11-28 to current/open; source msha-controller-operator-history