Bulgaria's Road Infrastructure Agency said on Tuesday that it has opened a 875.3 million levs ($524.2 million/447.5 million euro) tender for the construction of a 23.6-kilometer section of Struma motorway.The contract for building the motorway section between the towns of Kresna and Krupnik, in southwestern Bulgaria, will be partially financed by EU funds under Operational Programme Transport and Transport Infrastructure 2014-2020, the government agency said in a statement.The project includes the construction of 7 bridges and 21 viaducts.The tender is divided into two lots in order to allow for the completion of the project by 2023, as required by the rules of the EU operating programme.