Works on the project also include design, delivery of the necessary equipment as well as construction supervision, the municipality said in a tender notice.
Bids in the tender will be ranked based on offered price, with 50% weight in the final mark, and time for completing design and construction works.
The deadline for submitting offers is October 15.
The project is expected to be completed within 720 days, of which 180 days for design and 540 days for construction works.
(1 euro = 1.95583 levs)