X0101 EFFECT 33 LIVE 2013-10-03 16:00:00

S-3

0001385544 Horsehead Holding Corp 333-191441 0001468501 Horsehead Corp 333-191441-05 0001468513 Chestnut Ridge Railroad Corp. 333-191441-04 0001578784 HORSEHEAD METAL PRODUCTS, INC. 333-191441-03 0001578785 INTERNATIONAL METALS RECLAMATION COMPANY, INC. 333-191441-02 0001578786 HORSEHEAD ZINC POWDERS, LLC 333-191441-01