# Relationship history for MSHA mine 1301775

Current hierarchy: **L R Falk Construction Company; Cemstone Concrete Solutions → FALKSTONE LLC → DIRT/SAND SCREEN-AASE PIT**

- 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:** Randall Transit Mix Company → DIRT/SAND SCREEN-AASE PIT; 1950-01-01 to 1986-06-09; source msha-controller-operator-history
- **controller_controls_mine:** Whitney C  Randall → DIRT/SAND SCREEN-AASE PIT; 1950-01-01 to 1986-06-09; source msha-controller-operator-history
- **controller_controls_operator:** Whitney C  Randall → Randall Transit Mix Company; 1950-01-01 to 1986-06-09; source msha-controller-operator-history
- **operator_operates_mine:** Randall Transit Mix Company → DIRT/SAND SCREEN-AASE PIT; 1986-06-10 to 2006-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alan Gerald  Brunsvold → DIRT/SAND SCREEN-AASE PIT; 1986-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alan Gerald  Brunsvold → Randall Transit Mix Company; 1986-06-10 to 2006-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Randall Ready Mix LLC → DIRT/SAND SCREEN-AASE PIT; 2006-06-01 to 2011-01-17; source msha-controller-operator-history
- **controller_controls_mine:** Falkstone LLC → DIRT/SAND SCREEN-AASE PIT; 2006-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Falkstone LLC → Randall Ready Mix LLC; 2006-06-01 to 2011-01-17; source msha-controller-operator-history
- **operator_operates_mine:** FALKSTONE LLC → DIRT/SAND SCREEN-AASE PIT; 2011-01-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cemstone Concrete Solutions et al → DIRT/SAND SCREEN-AASE PIT; 2011-01-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemstone Concrete Solutions et al → FALKSTONE LLC; 2011-01-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** L R Falk Construction Company  et al → FALKSTONE LLC; 2011-01-18 to current/open; source msha-controller-operator-history