This article from 10 days ago says "About 1,900 feet of the 4,300-foot-long tunnel has been dug in the seven weeks since the project’s kickoff". https://www.re

This article from 10 days ago says "About 1,900 feet of the 4,300-foot-long tunnel has been dug in the seven weeks since the project’s kickoff". https://www.reviewjournal.com/business/conventions/boring-co-s-1st-las-vegas-convention-center-tunnel-nears-halfway-point-1929443/ https://www.reviewjournal.com/business/conventions/boring-co... So I think the Teslarati article just rounded 4,300 feet up to "a mile" (=5,280 feet). 1900/4300 = 44%.