Home - Construction Updates - San Marcos Segment San Marcos Construction Updates Road Closures on Las Flores During Construction Hours June 26, 2013: The southbound lane on Las Flores Drive is closed from June 24 from 7:00 a.m. to 6:00 p.m. between 9th Street and Decora Circle for a pipeline installation and will remain closed until July 8. Read more Wed, June 26, 2013 (No comments) San Marcos Pipeline Construction Begins June 24, 2013: Construction along 9th Street in San Marcos is coming to a close and the construction has begun on Las Flores Drive. Las Flores Drive is closed from June 13 from 5:30 p.m. to 7:00 a.m. Read more. Tue, June 25, 2013 (No comments) « Previous1234