| Form: | S-4 |
| CIK: | 0001571371 | | Company Name: | Summit Materials, LLC | | File Number: | 333-213904 |
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| CIK: | 0001602836 | | Company Name: | Alleyton Services Company, LLC | | File Number: | 333-213904-36 |
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| CIK: | 0001571397 | | Company Name: | Austin Materials, LLC | | File Number: | 333-213904-35 |
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| CIK: | 0001571274 | | Company Name: | Continental Cement Company, L.L.C. | | File Number: | 333-213904-34 |
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| CIK: | 0001571210 | | Company Name: | Kilgore Companies, LLC | | File Number: | 333-213904-33 |
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| CIK: | 0001571374 | | Company Name: | Summit Materials Corporations I, Inc. | | File Number: | 333-213904-31 |
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| CIK: | 0001571376 | | Company Name: | Summit Materials Holdings II, LLC | | File Number: | 333-213904-30 |
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| CIK: | 0001620248 | | Company Name: | Summit Materials International, LLC | | File Number: | 333-213904-29 |
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| CIK: | 0001648751 | | Company Name: | Concrete Supply of Topeka, Inc. | | File Number: | 333-213904-28 |
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| CIK: | 0001571400 | | Company Name: | Cornejo & Sons, L.L.C. | | File Number: | 333-213904-27 |
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| CIK: | 0001571412 | | Company Name: | N.R. Hamm Contractor, LLC | | File Number: | 333-213904-25 |
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| CIK: | 0001571403 | | Company Name: | N.R. Hamm Quarry, LLC | | File Number: | 333-213904-24 |
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| CIK: | 0001648740 | | Company Name: | Penny's Concrete & Ready Mix, L.L.C. | | File Number: | 333-213904-23 |
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| CIK: | 0001685584 | | Company Name: | R.D. Johnson Excavating Company, LLC | | File Number: | 333-213904-22 |
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| CIK: | 0001571406 | | Company Name: | Bourbon Limestone Co | | File Number: | 333-213904-21 |
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| CIK: | 0001571409 | | Company Name: | Hinkle Contracting Company, LLC | | File Number: | 333-213904-20 |
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| CIK: | 0001571393 | | Company Name: | Con-Agg of MO, L.L.C. | | File Number: | 333-213904-19 |
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| CIK: | 0001648739 | | Company Name: | Green America Recycling, LLC | | File Number: | 333-213904-18 |
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| CIK: | 0001685588 | | Company Name: | Sierra Ready Mix Ltd Liability Co | | File Number: | 333-213904-17 |
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| CIK: | 0001685557 | | Company Name: | American Materials Company, LLC | | File Number: | 333-213904-16 |
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| CIK: | 0001685578 | | Company Name: | H.C. Rustin Corp | | File Number: | 333-213904-15 |
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| CIK: | 0001620242 | | Company Name: | Buckhorn Materials, LLC | | File Number: | 333-213904-14 |
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| CIK: | 0001648732 | | Company Name: | Colorado County Sand & Gravel Co., L.L.C. | | File Number: | 333-213904-13 |
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| CIK: | 0001571418 | | Company Name: | Industrial Asphalt, LLC | | File Number: | 333-213904-12 |
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| CIK: | 0001685583 | | Company Name: | Pelican Asphalt Co LLC | | File Number: | 333-213904-11 |
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| CIK: | 0001571854 | | Company Name: | SCS Materials, LLC | | File Number: | 333-213904-10 |
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| CIK: | 0001620241 | | Company Name: | Troy Vines, Inc | | File Number: | 333-213904-09 |
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| CIK: | 0001571422 | | Company Name: | B&B Resources, Inc. | | File Number: | 333-213904-08 |
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| CIK: | 0001648738 | | Company Name: | Kilgore Partners, L.P. | | File Number: | 333-213904-07 |
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| CIK: | 0001659384 | | Company Name: | LeGrand Johnson Construction Co. | | File Number: | 333-213904-06 |
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| CIK: | 0001685574 | | Company Name: | Boxley Materials Co | | File Number: | 333-213904-05 |
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| CIK: | 0001648752 | | Company Name: | Lewis & Lewis, Inc. | | File Number: | 333-213904-04 |
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| CIK: | 0001571522 | | Company Name: | Summit Materials Finance Corp. | | File Number: | 333-213904-03 |
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| CIK: | 0001571377 | | Company Name: | Elam Construction, Inc. | | File Number: | 333-213904-02 |
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| CIK: | 0001602835 | | Company Name: | Alleyton Resource Company, LLC | | File Number: | 333-213904-01 |
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