# Relationship history for MSHA mine 1401302

Current hierarchy: **Martin Marietta Materials Inc → Martin Marietta Materials, Inc. → De Soto Sand**

- 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:** Martin Marietta Materials Inc → De Soto Sand; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** N R  Hamm → De Soto Sand; 1950-01-01 to 2012-02-08; source msha-controller-operator-history
- **operator_operates_mine:** Kaw Sand Company Inc → De Soto Sand; 1979-01-01 to 1995-03-31; source msha-controller-operator-history
- **controller_controls_mine:** David  Penny → De Soto Sand; 1979-01-01 to 1995-03-31; source msha-controller-operator-history
- **controller_controls_operator:** David  Penny → Kaw Sand Company Inc; 1979-01-01 to 1995-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Marlene  Penny et al → De Soto Sand; 1988-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Penny's Concrete, Inc. → De Soto Sand; 1995-04-01 to 2011-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Marlene  Penny et al → Penny's Concrete, Inc.; 1995-04-01 to 2011-06-30; source msha-controller-operator-history
- **controller_controls_operator:** William  Penny et al → Penny's Concrete, Inc.; 1995-04-01 to 2011-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Penny's Aggregates, Inc. → De Soto Sand; 2011-07-01 to 2016-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Marlene  Penny et al → De Soto Sand; 2011-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marlene  Penny et al → Penny's Aggregates, Inc.; 2011-07-01 to 2016-12-31; source msha-controller-operator-history
- **controller_controls_operator:** William  Penny et al → Penny's Aggregates, Inc.; 2011-07-01 to 2016-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Summit Materials LLC → De Soto Sand; 2012-02-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sahara Sand → De Soto Sand; 2017-01-01 to 2021-06-10; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Penny → De Soto Sand; 2017-01-01 to 2019-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Penny → Sahara Sand; 2017-01-01 to 2019-01-31; source msha-controller-operator-history
- **controller_controls_mine:** David M Penny et al → De Soto Sand; 2019-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David M Penny et al → Sahara Sand; 2019-02-01 to 2021-06-10; source msha-controller-operator-history
- **controller_controls_operator:** Carmiletta  Penny et al → Sahara Sand; 2019-02-01 to 2021-06-10; source msha-controller-operator-history
- **operator_operates_mine:** N R Hamm Quarry LLC → De Soto Sand; 2021-06-11 to 2026-03-22; source msha-controller-operator-history
- **controller_controls_operator:** N R  Hamm → N R Hamm Quarry LLC; 2021-06-11 to 2012-02-08; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → N R Hamm Quarry LLC; 2021-06-11 to 2026-03-22; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Materials, Inc. → De Soto Sand; 2026-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Materials, Inc.; 2026-03-23 to current/open; source msha-controller-operator-history