English to Japanese Tech/Engineering Construction / Civil Engineering infrastructure

This phrase is from a description of community development. The original text is 'The construction contract was awarded to the company and the enabling works were in progress.' 'Infrastructure facilities will be built, including a roads network and earthworks. The earthworks consist of raising the level of the five major access roads and the canal area by 4 m. and enabling work to commence on the construction of facilities. A total of 13 km of major roads is required.' I would be grateful if you would propose your translation.