Raising the height of the dam 18½ feet will allow the bureau to store an additional 630,000 acre-feet of water in Shasta Lake. The McCloud is an area of special interest because it is one of California's best trout fisheries and because many sacred Native American sites lie along its banks.One of the most important points made by dam expansion opponents is that raising the dam will not create more water (in fact it will actually cause some water loss due to evaporation) but merely increases the capacity to store it. The massive temperature curtain on the lake side of the dam will have to be removed and raised, Bader said.The temperature curtain lets dam operators move deeper, colder water through the dam and into the Sacramento River, where it is needed downstream by winter-run chinook salmon for spawning.The bureau plans to award a contract to raise the dam in December 2019 and work would begin shortly thereafter, Bader said. Shasta Dam, Shasta County, California. "Our secretary has made it abundantly clear he wants to enhance recreational opportunities on the lake," Bader said.Nathan Morgan hangs over the side of Shasta Dam in 2018. "I'm confident in saying that the horse has left the stable," Doyle said.Sugarloaf would be inundated by the higher lake level, he said, so his business would either need to be moved or bought out.The bureau has been studying the idea of raising the dam since the 1980s, so Jones said he is eager to find out if the work will actually begin.“After having this hanging over our heads for the past decade all I want is a ‘Yes, we’re going to do it’ or a ‘No we’re not,’” Jones said. The tower setup comprised one main tower, standing 465 feet (142 m) high from its foundations and 700 feet (210 m) above the river, and seven movable auxiliary towers; cables were strung from the top of the main tower to each of the others.Building of the dam's main concrete structure started in July 1940 after the cable systems had been completed and the mixing plant came on line. The bureau blamed the warm temperatures and resulting die-offs on failed temperature monitoring equipment and faulty modeling. Envisioned as early as 1919 as an effort to conserve, control, store, and distribute water to the Even before its dedication, Shasta Dam served an important role in In the late 19th century, the Central Valley was the main destination for large numbers of immigrants traveling into California from the The low-lying topography of the Sacramento Valley makes it vulnerable to flooding in the winter; conversely, irrigation is necessary during the summer due to the highly seasonal precipitation. The holes were being drilled to test the strength of the concrete in preparation for raising the height of the dam. 38. Until this time, the Sacramento had still been flowing through the middle of the dam site, between the two nearly completed abutments of the dam. Development of irrigation in the valley began on a large scale in the 1850s, following the discovery of gold that brought hundreds of thousands of people from around the world to California’s mining regions. DTTV Documentaries 2,283,300 views.
To reroute the track, crews constructed bridges, trestles and tunnels, including one tunnel later used to divert the river around the site so the dam could be built.The railroad delivered cement, which was mixed with the aggregate and river water at a plant upstream, the wet concrete then hurried to the construction site on a huge cableway system that reached all parts of the dam. Soon to come on board as general superintendent was engineer Frank Crowe, who had taken charge at a number of other prominent Reclamation dams: Arrowrock, Hoover and Parker among them.A crew that eventually totaled 4,700 men excavated millions of tons of granite from the hillsides and built a 9.6-mile-long conveyor belt, which operated 24 hours a day, transporting aggregate from a quarry nine miles away. By July 1940, crews were hard at work pouring concrete from huge buckets into wooden forms that created a series of interlocking, 50-foot-by-50-foot blocks for the dam face.
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