| Lab Number | Lab Name | City | State |
|---|---|---|---|
| 916813 | HDR Engineering, Inc. Paducah Laboratory | Paducah | KY |
| 917013 | Hunt-Rogers Materials, LLC Hunt-Rogers Farmington Quarry Laboratory | Fayetteville | AR |
| 911606 | Hunt-Rogers Materials, LLC Springdale Laboratory | Springdale | AR |
| 911406 | Hutchens Construction Gravette Laboratory | Sulphur Springs | AR |
| 903300 | Hutchens Construction Sonora Laboratory | Springdale | AR |
| 918616 | Hutchens Construction Berryville Laboratory | Berryville | AR |