# Relationship history for MSHA mine 1512992

Current hierarchy: **Jeffery S.  Kinser → Big Sandy Resources Inc → Dredge #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

- **operator_operates_mine:** L J & S Dredging → Dredge #2; 1981-07-01 to 1982-10-14; source msha-controller-operator-history
- **controller_controls_mine:** Mc Sweeney L H → Dredge #2; 1981-07-01 to 1982-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Mc Sweeney L H → L J & S Dredging; 1981-07-01 to 1982-10-14; source msha-controller-operator-history
- **operator_operates_mine:** B C & W Energy → Dredge #2; 1982-10-15 to 1985-01-06; source msha-controller-operator-history
- **controller_controls_mine:** Clark John W → Dredge #2; 1982-10-15 to 1985-01-06; source msha-controller-operator-history
- **controller_controls_operator:** Clark John W → B C & W Energy; 1982-10-15 to 1985-01-06; source msha-controller-operator-history
- **operator_operates_mine:** Shannaco → Dredge #2; 1985-01-07 to 1989-11-19; source msha-controller-operator-history
- **controller_controls_mine:** Bolender Daniel J & Gregory K Collins → Dredge #2; 1985-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bolender Daniel J & Gregory K Collins → Shannaco; 1985-01-07 to 1989-11-19; source msha-controller-operator-history
- **controller_controls_mine:** Jeffery S.  Kinser → Dredge #2; 1988-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Florida Progress Corporation → Dredge #2; 1989-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kentucky May Coal Company Inc → Dredge #2; 1989-11-20 to 1991-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Florida Progress Corporation → Kentucky May Coal Company Inc; 1989-11-20 to 1991-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Big Sandy Reclamation Inc → Dredge #2; 1991-04-01 to 1993-10-05; source msha-controller-operator-history
- **controller_controls_mine:** Sammons James Et Al → Dredge #2; 1991-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sammons James Et Al → Big Sandy Reclamation Inc; 1991-04-01 to 1993-10-05; source msha-controller-operator-history
- **operator_operates_mine:** Big Sandy Resources Inc → Dredge #2; 1993-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery S.  Kinser → Big Sandy Resources Inc; 1993-10-06 to current/open; source msha-controller-operator-history