# Relationship history for MSHA mine 4602127

Current hierarchy: **James River Coal Company → Rockhouse Creek Development Corp → Rockhouse Ck Dev Corp Refuse Fac**

- 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:** Powellton Company → Rockhouse Ck Dev Corp Refuse Fac; 1950-01-01 to 1986-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Siderius Inc → Rockhouse Ck Dev Corp Refuse Fac; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Siderius Inc → Powellton Company; 1950-01-01 to 1986-03-31; source msha-controller-operator-history
- **operator_operates_mine:** M & H Coal Company → Rockhouse Ck Dev Corp Refuse Fac; 1986-04-01 to 1999-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Poval Corporation → Rockhouse Ck Dev Corp Refuse Fac; 1986-04-01 to 1999-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Poval Corporation → M & H Coal Company; 1986-04-01 to 1999-08-31; source msha-controller-operator-history
- **controller_controls_mine:** International Industries Inc → Rockhouse Ck Dev Corp Refuse Fac; 1999-06-01 to 2007-07-15; source msha-controller-operator-history
- **operator_operates_mine:** Rockhouse Creek Development Corp → Rockhouse Ck Dev Corp Refuse Fac; 1999-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** International Industries Inc → Rockhouse Creek Development Corp; 1999-09-01 to 2007-07-15; source msha-controller-operator-history
- **controller_controls_mine:** International Resources LLC → Rockhouse Ck Dev Corp Refuse Fac; 2007-07-16 to 2011-04-17; source msha-controller-operator-history
- **controller_controls_operator:** International Resources LLC → Rockhouse Creek Development Corp; 2007-07-16 to 2011-04-17; source msha-controller-operator-history
- **controller_controls_mine:** James River Coal Company → Rockhouse Ck Dev Corp Refuse Fac; 2011-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James River Coal Company → Rockhouse Creek Development Corp; 2011-04-18 to current/open; source msha-controller-operator-history