# Relationship history for MSHA mine 0800261

Current hierarchy: **Steve  Shaw → Couch Aggregates LLC → Diamond Sand Mine**

- 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:** Adams Sand Company Inc → Diamond Sand Mine; 1950-01-01 to 1984-09-26; source msha-controller-operator-history
- **controller_controls_mine:** Edward L  Adams → Diamond Sand Mine; 1950-01-01 to 1984-09-26; source msha-controller-operator-history
- **controller_controls_operator:** Edward L  Adams → Adams Sand Company Inc; 1950-01-01 to 1984-09-26; source msha-controller-operator-history
- **operator_operates_mine:** Adams Sand Company → Diamond Sand Mine; 1984-09-27 to 1991-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Don  Gamble → Diamond Sand Mine; 1984-09-27 to 1991-02-04; source msha-controller-operator-history
- **controller_controls_operator:** Don  Gamble → Adams Sand Company; 1984-09-27 to 1991-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Rodney H  Greenway → Diamond Sand Mine; 1989-10-30 to 2000-07-06; source msha-controller-operator-history
- **operator_operates_mine:** Diamond Sand Company → Diamond Sand Mine; 1991-02-05 to 2000-07-06; source msha-controller-operator-history
- **controller_controls_operator:** Rodney H  Greenway → Diamond Sand Company; 1991-02-05 to 2000-07-06; source msha-controller-operator-history
- **operator_operates_mine:** Rodney H Greenway Inc → Diamond Sand Mine; 2000-07-07 to 2003-05-04; source msha-controller-operator-history
- **controller_controls_mine:** Southdown Inc → Diamond Sand Mine; 2000-07-07 to 2001-02-27; source msha-controller-operator-history
- **controller_controls_operator:** Southdown Inc → Rodney H Greenway Inc; 2000-07-07 to 2001-02-27; source msha-controller-operator-history
- **controller_controls_mine:** Ready Mix USA Inc → Diamond Sand Mine; 2000-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Diamond Sand Mine; 2001-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Rodney H Greenway Inc; 2001-02-28 to 2003-05-04; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Diamond Sand Mine; 2001-07-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cemex Construction Materials LP → Diamond Sand Mine; 2003-05-05 to 2005-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex Construction Materials LP; 2003-05-05 to 2005-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Couch Ready Mix USA, , LLC → Diamond Sand Mine; 2005-07-01 to 2012-06-29; source msha-controller-operator-history
- **controller_controls_operator:** Ready Mix USA Inc → Couch Ready Mix USA, , LLC; 2005-07-01 to 2012-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Couch Aggregates LLC → Diamond Sand Mine; 2012-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Shaw et al → Diamond Sand Mine; 2012-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Shaw et al → Couch Aggregates LLC; 2012-06-30 to current/open; source msha-controller-operator-history