The bidders were local firms Walter Mario Conta and Mega. The province plans to open economic bids on April 12.
Originally, the province had planned for the pipeline to stretch 175km but changed the distance during the tender process.
The pipeline will provide gas to La Candelaria, El Tala, El Jardin, Potrerillos, Tolombon, Cafayate, Animana and San Carlos.
Salta aims to award the construction works and sign the contract in the last week of April or first week of May, a source at Salta's production ministry told BNamericas.
Construction is due to require seven months once the project and environmental impact study (EIS) are approved by natural gas regulator Enargas.
Construction is expected to begin 60-90 days after contract signing, the source said.
The pipeline will include a valve in Tolombon, meaning the provinces to Salta's south could connect to the line, BNamericas reported previously.
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