# Relationship history for MSHA mine 1504469

Current hierarchy: **Eagle Materials Inc → Kosmos Cement Company, LLC → Kosmos Cement Plant**

- 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:** Flintkote Company → Kosmos Cement Plant; 1950-01-01 to 1980-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Flintkote Company → Kosmos Cement Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Flintkote Company → Flintkote Company; 1950-01-01 to 1980-04-06; source msha-controller-operator-history
- **operator_operates_mine:** Flintkote Cement Company → Kosmos Cement Plant; 1980-04-07 to 1980-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Cimenteries Cbr Cementbedrijven → Kosmos Cement Plant; 1980-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cimenteries Cbr Cementbedrijven → Flintkote Cement Company; 1980-04-07 to 1980-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Kosmos Cement Company Inc → Kosmos Cement Plant; 1980-12-01 to 1988-06-26; source msha-controller-operator-history
- **controller_controls_mine:** Moore Mc Cormack Resources Inc → Kosmos Cement Plant; 1980-12-01 to 1988-06-26; source msha-controller-operator-history
- **controller_controls_operator:** Moore Mc Cormack Resources Inc → Kosmos Cement Company Inc; 1980-12-01 to 1988-06-26; source msha-controller-operator-history
- **operator_operates_mine:** Kosmos Cement Company → Kosmos Cement Plant; 1988-06-27 to 2002-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Southdown Inc → Kosmos Cement Plant; 1988-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Southdown Inc → Kosmos Cement Company; 1988-06-27 to 2002-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Kosmos Cement Plant; 1994-09-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Kosmos Cement Plant; 2000-11-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kosmos Cement Company → Kosmos Cement Plant; 2002-03-01 to 2003-02-13; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Kosmos Cement Company; 2002-03-01 to 2003-02-13; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX INC. → Kosmos Cement Plant; 2003-02-14 to 2015-07-26; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX INC.; 2003-02-14 to 2015-07-26; source msha-controller-operator-history
- **operator_operates_mine:** KOSMOS CEMENT CO. → Kosmos Cement Plant; 2015-07-27 to 2020-03-06; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → KOSMOS CEMENT CO.; 2015-07-27 to 2020-03-06; source msha-controller-operator-history
- **operator_operates_mine:** Kosmos Cement Company, LLC → Kosmos Cement Plant; 2020-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eagle Materials Inc → Kosmos Cement Plant; 2020-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eagle Materials Inc → Kosmos Cement Company, LLC; 2020-03-07 to current/open; source msha-controller-operator-history