It connected the Colônia Agrícola Benjamin Constant from 1904 to 1964 with the riverboat port of Sapucaia on the Rio Caeté opposite Bragança in the state of Pará.

The governor of the Brazilian state of Pará decided, to build a Decauville railway between the Colônia Agrícola Benjamin Constant, named after the republic's founder Benjamin Constant Botelho de Magalhães, and the city of Bragança.

He was able to ascertain without much difficulty that the instructions had not been followed because no plans or sections of the track, bridges, stations, culverts or the work specified in the contract could be found.

The track had been laid without proper surveying or leveling, occasionally there were counter-curves without intermediate straight sections.

In addition, it would have been impossible to lay more track, even if the government had done so itself, as the barque Agnes had been stranded and abandoned with all building materials at Sapucaia, before it could be unloaded, as agreed with the insurance company.

The contract was therefore terminated, and Governor Montenegro duly authorized the engineer Lemos on behalf of the colonial administration to continue the construction work.

For the operation of the route a telephone line had been laid, which connected the station Benjamin Constant with that in Bragança.

It was planned to build a bridge over the Rio Caete to connect with the city of Bragança.