Carley V. Porter tunnel construction
Tehachapis Tunnel Milestone Reached BAKERSFIELD (UPI) -It took more than four years--it's 15 months behind schedule--but a dynamite blast and a champagne party Thursday will mark "holding through" of the tunnel that will carry state water project water under the Tehachapis. Pro-West Party Is Elected GABERONES, B o t s w a n a (UPI) -- President Seretse Khama's pro-Western Democratic party took a firm hold on Botswana for another four years today on the basis oE returns from weekend elections. Crowds gathered in the streets to shout "Pula! Pula!" to Khama. "Pula!" which means rain, is the highest compliment possible in this Texasrsized nation of deserts and swamps. The 4.8-mile Carley W. Porter tunnel -south of here is the southernmost and longest of four tunnels which, with the aid of pumps, will lift surplus Northern California water out of the Central Valley and deliver it to the Los Angeles basin and the Mojave Desert. 'This is a pretty major milestone," says -William Gianelli, director of water resources. When finally lined with concrete to a 20-foot diameter, water will flow through to a capacity of 120 million gallons is iiour. Gianelli said -water is expected to be flowing under the mountains "between the first of April and the first of July. Supervisors for the contracting combine headed by Dravo Corp. call the earthquake-prone, fault-ridden Tehachapis a "geological nightmare." 'It's one of the most difficult" tunneling projects in California says Alfred Golze, deputy water resources director. "The tunnel has as many curves as a centipede but hydrologists tell us water will flow through it." The Porter tunnel is 900 feet below the surface but three times in the complex through | the mountains, the aqueduct, comes to the surface at known 1 fault zones. "It's not earthquake-proof, but reasonably so," Golze said. I doubt there would be much damage to the tunnel from an average earthquake and in an above average earthquake like the one at Bakersfield in 1952, it would be repairable." Workmen tunneling both from the south and north constantly ran into collapsing ground and runs" of mud and water. Circular "shields" of two-inch- thick steel plate were inserted to hold the ground. ..There were no deaths on the project begun in May 1966 but 17 men were trapped nearly two days just before Christmas in 1967 by a cave-in. There were 28 injuries among the work crew which averages 160 men--80 at each, heading in three shifts. The tunnel cost $33.8 million and is named for'Assembly Carley V. Porter, D-Compton, chairman of the Assembly Water Committee and coauthor 'of the Burns-Porter Act which established financing for the more than $3 billion state project. 20-Year Terms Given 2 Arabs 'HEBRON, Occupied Jordan (UPI) -- An Israeli militarj court Monday sentenced twc Hebron Arabs to 20 years in prison for anti-Israeli activities Israeli security forces chargei the Arabs monitored radioei commands from Al Fatah guerrillas in Amman, includmi an order to set off a truckloai of explosives in downtown Jerusalem. They were seize 1 before they could do it, Israe said.