Colombia's President Juan Manuel Santos has launched a tender for the first phase of the Bogotá river sanitation program.
Stage I work will require an investment of some US$500mn, of which US$250mn is being funded with a World Bank loan, and aims to clean up and control flooding on the river, according to a release on the presidential website.
Remediation work to double the river's capacity will be carried out on a stretch running from the Alicachín sector to Cota municipality in Cundinamarca department.
Other work entails repairing embankments and dikes, which will further increase the river's capacity, according to Santos.
A later stage will involve building a 1.6tn-peso (US$830mn) wastewater treatment facility and pumping station in the capital city.
The program is being carried out by the central, Bogotá and Cundinamarca governments.