By Richard W. Galster, Alan S. Imrie, John W. Sager, Fred J. Miklancic
About The Product
Published by way of the yankee Geophysical Union as a part of the Field journey Guidebooks Series.
This expedition will stopover at dams developed at the major stem of the Columbia River and a few of its significant tributaries throughout the half-century among 1933 and 1983. Engineering geology difficulties linked to siting, layout, and building of those initiatives and the relation of the nearby geology to many of the websites might be mentioned. within the technique, the journey will go through parts of six significant geologic provinces of the North American Cordillera: Puget Sound Basin, Cascade Mountains, Willamette Lowland, Columbia Plateau, Northern Rocky Mountains, and Okanogan- Shuswap Highlands. The Columbia River process drains elements or all of those geologic provinces aside from the Puget Sound Basin, the place the journey will start and finish. The approximate obstacles of those geologic provinces, including a few of their inner divisions, are proven on determine 0-1.
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In regards to the ProductPublished via the yank Geophysical Union as a part of the sector journey Guidebooks sequence. This expedition will stopover at dams developed at the major stem of the Columbia River and a few of its significant tributaries throughout the half-century among 1933 and 1983. Engineering geology difficulties linked to siting, layout, and building of those tasks and the relation of the nearby geology to some of the websites could be mentioned.
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Extra resources for Engineering Geology of Major Dams on the Columbia River Puget Sound Basin to Northern Rocky Mountains July 21-30, 1989
The Ginkgo Petrified Forest Museum is on the eroded top of the Museum flow, the uppermost unit of the Grande Ronde Basalt in this area. The extensive occurrence of petrified logs within the palagonite breccia of the lower Ginkgo flow and the presence of the Vantage interbed makes this horizon the most identifiable time-stratigraphic horizon in the central plateau. A stripped structural surface known as the "Museum platform" is commonly formed at this boundary of weak and competent units. At this stop, the platform can be seen rising on the south flank of the Frenchman Hills anticline, the most northerly of the EW-trending structures of the Yakima Fold Belt.
The sides of the trench are commonly marked by one or two intermittent kame terraces at varied elevations above the valley floor. These features are present on at least one side of the trench in most of the Canal Flats area. Rock outcrop is rarely seen on the T382: 40 terraces, but in a number of places it occurs at the base of the steep front of the terrace just above the floor of the trench and along the valley walls. Over the length of the trench traveled on this trip, glacial lake beds are common at lower elevations.
A downstream drainage gallery was also provided from which foundation drains were fanned out through flow contacts 14 and 15 to provide as unifonn distribution of drainage as possible. A downstream (tailrace) grout curtain was placed the length of the powerhouse and connected to the upstream grout curtain to facilitate draft tube dewatering. Upon the raising of the Lower Elev. (m) 700 (213) Monumental pool in 1969, prior to completion of Little Goose Dam, the drainage galleries of the dam were flooded by the higher tailwater.
Engineering Geology of Major Dams on the Columbia River Puget Sound Basin to Northern Rocky Mountains July 21-30, 1989 by Richard W. Galster, Alan S. Imrie, John W. Sager, Fred J. Miklancic