CONTRERAS Engenharia e Construções executes its works in fiber optic projects and assemblies, consisting in the implementation of a data transmission system to be executed along a specific pipeline. The system is formed by many Telecommunication Stations linked by fiber optic, buried and protected by PEAD pipes.

These works include topographic surveys, grubbing and grading, ditch opening, pipe transportation and unloading for welding, lowering, backfilling and restoration.