# Relationship history for MSHA mine 1518287

Current hierarchy: **Michael K  Cook; Randy A  Cook → Cook and Sons Mining, Inc. → Spring Branch #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

- **controller_controls_mine:** Allen G  Stump et al → Spring Branch #2; 1993-06-04 to 2001-03-07; source msha-controller-operator-history
- **operator_operates_mine:** Altec Energy Inc → Spring Branch #2; 2000-10-01 to 2001-03-07; source msha-controller-operator-history
- **controller_controls_operator:** Allen G  Stump et al → Altec Energy Inc; 2000-10-01 to 2001-03-07; source msha-controller-operator-history
- **controller_controls_mine:** Michael K  Cook et al → Spring Branch #2; 2000-11-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cook & Sons Mining Inc → Spring Branch #2; 2001-03-08 to 2002-07-08; source msha-controller-operator-history
- **controller_controls_operator:** Michael K  Cook et al → Cook & Sons Mining Inc; 2001-03-08 to 2002-07-08; source msha-controller-operator-history
- **controller_controls_operator:** Randy A  Cook et al → Cook & Sons Mining Inc; 2001-03-08 to 2002-07-08; source msha-controller-operator-history
- **operator_operates_mine:** Rickco, Inc. → Spring Branch #2; 2002-07-09 to 2003-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Rickey  Niece → Spring Branch #2; 2002-07-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rickey  Niece → Rickco, Inc.; 2002-07-09 to 2003-04-06; source msha-controller-operator-history
- **operator_operates_mine:** Cook and Sons Mining, Inc. → Spring Branch #2; 2003-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael K  Cook et al → Cook and Sons Mining, Inc.; 2003-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy A  Cook et al → Cook and Sons Mining, Inc.; 2003-04-07 to current/open; source msha-controller-operator-history