Artvin-Erzurum State Highway between Km:61+034.00 — 68+502.00; excavation/fill works, highway tunnel, prestressed beam viaduct, sub-base, base, reinforced concrete retaining walls of various sizes and rubble stone walls.
Artvin-Erzurum State Highway between Km:61+034.00 — 68+502.00; excavation/fill works, highway tunnel, prestressed beam viaduct, sub-base, base, reinforced concrete retaining walls of various sizes and rubble stone walls.
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