CPI Pipe and Steel, Inc.

Hanson Aggregates WRP, Inc. - OK1

Craig County

APAC Central, Inc. - Tulsa East Quarry

T&M Sand & Gravel, Inc. - Watts Pit

APAC Central, Inc. - Roberts Quarry

Alan Ritchey Materials Company - Pope's Point

East OK, Inc.

Dig-It Rocks, LLC - 7-Mile Mine

Sober Brothers, Inc. - Gonterman 1

US Silica - Mill Creek North

TXI Operations LP Partnership - Mill Creek

Chapel Rose Quarries

American Gypsum Company, LLC - Tom Gilbreath Properties

RL Jones Construction Co., Inc., dba J&J Sand - J&J #3

APAC Central, Inc. - Okay Quarry

Parker Chop Stone, LLC - Chop Stone Yard

Oldham Enterprises, LLC - Oldham #1 & #2

Tandem Services, Inc. - Kolb Pit

General Materials, Inc. - 63rd Street