The Los Angeles Times provides a rare look into the engineering marvel of a 13-mile tunnel beneath Mt. San Jacinto, which has been transporting Colorado River water to Southern California since the 1930s. This insightful piece sheds light on the design and construction of the tunnel, highlighting the significance of such infrastructure in providing water to a region often grappling with water scarcity and drought. The article offers a fascinating perspective on the intricate engineering involved in ensuring water access for a densely populated area. The tunnel's design and maintenance play a crucial role in sustaining urban and agricultural activities in Southern California.