It’s official: The final pipe segment on the W-6 sewer main replacement was put in place in July. The much-needed infrastructure project along U.S. Highway 90 to SW Military Drive near Joint Base San Antonio-Lackland has involved five miles of tunneling more than 100 feet underground to avoid disrupting traffic and military activity on the surface. When it comes on line in 2023, the whopping 104-inch-wide sewer line will serve more than 500,000 San Antonians. SAWS officials say the $210 million project is the most costly, complex sewer pipeline constructed in the city’s history.