Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Final report analyzing aerial gamma ray and magnetic data in the Detroit quadrangle, including a detailed geologic summary, interpretation report, reduced scale copies of all maps and profiles, histograms, and statistical tables for the quadrangle.

Partial abstract: "The study consisted of field and laboratory investigations, construction evaluation, and geotechnical and structural analyses to determine the cause(s) of distress and failure of a 2600-ft section of 12-ft 9-in. diameter concrete-lined sanitary sewer tunnel in the Detroit, Mich., area. [...] The report includes summaries of all pertinent construction records, results of all pertinent past and current field and laboratory tests on construction and geotechnical materials, and detailed geotechnical and structural analyses based on observed conditions and measured parameters."

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Single record data listings taken during aerial gamma-ray and magnetic surveys of the Manitowoc and Traverse City quadrangles in Wisconsin and Michigan.

Average record data listings taken during aerial gamma-ray and magnetic surveys of the Milwakee and Midland quadrangles in Wisconsin and Michigan.

Single record data listings taken during aerial gamma-ray and magnetic surveys of the Racine and Grand Rapids quadrangle in Wisconsin, Illinois, and Michigan.

Final report analyzing aerial gamma ray and magnetic data in the Manitowoc and Traverse City quadrangles, including a detailed geologic summary, interpretation report, reduced scale copies of all maps and profiles, histograms, and statistical tables for the quadrangle.

Average record data listings taken during aerial gamma-ray and magnetic surveys of the Manitowoc and Traverse City quadrangles in Wisconsin and Michigan.

Final report analyzing aerial gamma ray and magnetic data in the Milwaukee and Midland quadrangles, including a detailed geologic summary, interpretation report, reduced scale copies of all maps and profiles, histograms, and statistical tables for the quadrangle.

Single record data listings taken during aerial gamma-ray and magnetic surveys of the Milwaukee and Midland quadrangles in Wisconsin and Michigan.

Final report analyzing aerial gamma ray and magnetic data in the Racine and Grand Rapids quadrangles, including a detailed geologic summary, interpretation report, reduced scale copies of all maps and profiles, histograms, and statistical tables for the quadrangle.

Average record data listings taken during aerial gamma-ray and magnetic surveys of the Racine and Grand Rapids quadrangles in Wisconsin, Illinois, and Michigan.

Single record data listings taken during aerial gamma-ray and magnetic surveys of the Tawas City and Flint quadrangles in Michigan.

Final report analyzing aerial gamma ray and magnetic data in the Tawas City and Flint quadrangles, including a detailed geologic summary, interpretation report, reduced scale copies of all maps and profiles, histograms, and statistical tables for the quadrangle.

Average record data listings taken during aerial gamma-ray and magnetic surveys of the Tawas City and Flint quadrangles in Michigan.

Average record data listings taken during aerial gamma-ray and magnetic surveys of the Toledo quadrangle in Ohio and Michigan.

Average record data listings taken during aerial gamma-ray and magnetic surveys of the Detroit quadrangle in Michigan.

Single record data listings taken during aerial gamma-ray and magnetic surveys of the Detroit quadrangle in Michigan.

Single record data listings taken during aerial gamma-ray and magnetic surveys of the Fort Wayne quadrangle in Indiana, Ohio, and Michigan.

Average record data listings taken during aerial gamma-ray and magnetic surveys of the Fort Wayne quadrangle in Indiana, Ohio, and Michigan.