# Relationship history for MSHA mine 4600029

Current hierarchy: **Greer Industries Inc → Decker's Creek Limestone Company → Decker's Creek Limestone Company**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Marquette Cement Manufacturing Company → Decker's Creek Limestone Company; 1950-01-01 to 1982-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Gulf + Western Industries Inc → Decker's Creek Limestone Company; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gulf + Western Industries Inc → Marquette Cement Manufacturing Company; 1950-01-01 to 1982-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Lone Star Industries Inc → Decker's Creek Limestone Company; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lone Star Cement Inc → Decker's Creek Limestone Company; 1982-04-15 to 1988-06-26; source msha-controller-operator-history
- **controller_controls_operator:** Lone Star Industries Inc → Lone Star Cement Inc; 1982-04-15 to 1988-06-26; source msha-controller-operator-history
- **operator_operates_mine:** Kosmos Cement Company → Decker's Creek Limestone Company; 1988-06-27 to 1995-09-28; source msha-controller-operator-history
- **controller_controls_mine:** Southdown Inc → Decker's Creek Limestone Company; 1988-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Southdown Inc → Kosmos Cement Company; 1988-06-27 to 1995-09-28; source msha-controller-operator-history
- **operator_operates_mine:** Decker's Creek Limestone Company → Decker's Creek Limestone Company; 1995-09-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Greer Industries Inc → Decker's Creek Limestone Company; 1995-09-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greer Industries Inc → Decker's Creek Limestone Company; 1995-09-29 to current/open; source msha-controller-operator-history