Summary: "Prototype tests of an acoustic flowmeter system were made in a 24-ftdiam power penstock at Oahe Dam to evaluate the system prior to permanent installation in the outlet works at Summersville Dam. Comparative discharge measurements included acoustic, penstock pressure-momentum (Gibson), turbine model test ratings, scroll-case pressure differential (Winter-Kennedy flowmeter), and surge tank volume changes. The acoustic flowmeter measurements were very consistent and many of the comparisons were within 1%. The location of the measuring section for a single-path acoustic flowmeter must be selected to give a known or measurable relation between the flow pattern of the whole section and that along the acoustic path" (p. xi).

Photograph of Mildred Zichner standing in front of the marker to the Badlands in South Dakota.

Photograph of the marker for Badlands National Park in South Dakota.

Photograph of terrain in the Badlands National Park in South Dakota.

Photograph of mountainous landscape at Badlands National Park in South Dakota.

Photograph of landscape at the Badlands National Park in South Dakota.

Photograph of mountainous region at the Badlands National Park in South Dakota.

Photograph of mountainous terrain in the Badlands National Park in South Dakota.

From abstract: The northern Black Hills bentonite mining district includes parts of Crook County, Wyo., Carter County, Mont., and Butte County, S. Dak. Within this district, many beds of bentonite occur interspersed with sedimentary strata of Cretaceous age that have an average total thickness of about 3,000 feet and consist chiefly of marine shale, marl, and argillaceous sandstone. The bentonite beds occur in formations ranging upward from the Newcastle sandstone to the lower part of the Mitten black shale member of the Pierre shale. Tertiary (?) and Quaternary deposits of gravel, sand, and silt are present on extensive terraces, and deposits of such materials also extend along stream courses in all parts of the district.

Photograph of landscape at the Cedar Lodge, near the Badlands National Park in South Dakota.

Photograph of dinosaur sculptures at Dinosaur Park in Rapid City, South, Dakota.

From introduction: This study was part of the U.S. Geological Survey's continuing study of the geology and ore deposits of the southern Black Hills, which was stimulated by the discovery of uranium deposits in sandstone in the area in 1951 (Page and Redden, 1952; Bell and Bales, 1955).

From introduction: This report evaluates four possible types of subsurface reservoirs for radioactive wastes in the Williston basin.

Letter from Alden Stevens to Harris Leon Kempner discussing about American Indian Affairs and requesting for support to continue legal aid clinic.

From abstract and introduction: Mineralogic and stratigraphic studies of the lower part of the Pierre Shale of Late Cretaceous age along the Missouri River indicate correlations different from those generally accepted. The purposes of this paper are to present evidence for the new correlations and to resolve problems of formal nomenclature that result from them.

Photograph of Mount Rushmore in South Dakota.

Photograph of mountainous landscape in Rapid City, South Dakota along Needles Highway.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story. This story aired at 12:00pm.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story. This story aired at 12:00pm.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

A report about sandstone in the black hills of Wyoming and South Dakota. It discusses the nonopaque heavy minerals found within it.