pier: raised structure in a body of water, typically supported by well-spaced piles or pillars

construction: process of the building or assembling of a building or infrastructure

foundation: lowest and supporting layer of a structure

Amazon rainforest: large rainforest in South America

group of humans: any set of human beings

crane: type of machine specialised in lifting objects

public works: broad category of infrastructure projects, financed and constructed by the government

river: larger natural watercourse

Porto Velho: municipality of Rondônia state, Brazil

Madeira River: river in Bolivia and Brazil

worker: person who works

railway: interconnected network of infrastructure and vehicles used for train rail transport