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  Partner: UNT Libraries Government Documents Department
 Language: English
 Collection: Technical Report Archive and Image Library
Ecoregions of North America: After the Classification of J.M. Crowley

Ecoregions of North America: After the Classification of J.M. Crowley

Date: June 1981
Creator: Bailey, Robert G.
Description: Color-coded map showing the ecoregions of North America, including the polar domain, humid temperate domain, dry domain, and humid tropical domain.
Contributing Partner: UNT Libraries Government Documents Department
Energy Related Use Conflicts for the Columbia River Estuary, Volume 2: Atlas

Energy Related Use Conflicts for the Columbia River Estuary, Volume 2: Atlas

Date: June 1983
Creator: U.S. Fish and Wildlife Service
Description: "This volume consists of 3 overviews, an index to the quadrants, and a series of 11 scenario maps that forecast energy related developments of the Lower Columbia River and Estuary from 1981 to 2006."
Contributing Partner: UNT Libraries Government Documents Department
Standard Time Zones of the United States and adjacent Parts of Canada and Mexico as of October 1, 1935

Standard Time Zones of the United States and adjacent Parts of Canada and Mexico as of October 1, 1935

Date: 1935
Creator: Geological Survey (U.S.)
Description: One map showing standard time zones of the United States as of October 1, 1935, with an updated map showing new boundaries in Georgia, Ohio, and Michigan. Notes on the first map describe the changes effective September 27, 1936 and November 23, 1941.
Contributing Partner: UNT Libraries Government Documents Department
Map of Standard Time Zones of the United States and Adjacent Parts of Canada and Mexico as of January 1, 1948

Map of Standard Time Zones of the United States and Adjacent Parts of Canada and Mexico as of January 1, 1948

Date: January 1, 1948
Creator: Geological Survey (U.S.)
Description: Map of the United States and surrounding areas with time zones marked and labeled in red. Bodies of water are marked, with depth marked by hatchures, as well as state lines and major cities..
Contributing Partner: UNT Libraries Government Documents Department
Nomograms for Obtaining the Compound Composition of Hydrated Limes from the Oxide Analysis

Nomograms for Obtaining the Compound Composition of Hydrated Limes from the Oxide Analysis

Date: December 30, 1949
Creator: Levin, Ernest M.
Description: Report with two nomograms presented for rapidly obtaining the compound composition of hydrated limes from the oxide analysis. The general nomogram can be applied to any commercial hydrated lime and gives values accurate to within 0.3 percent while the special nomogram is applicable only to regularly hydrated and highly hydrated dolomitic limes and is accurate to within 0.1 percent.
Contributing Partner: UNT Libraries Government Documents Department
Charts of Compressibility Factors and Charts Showing Quantities Delivered by Commercial Cylinders for Hydrogen, Nitrogen, and Oxygen

Charts of Compressibility Factors and Charts Showing Quantities Delivered by Commercial Cylinders for Hydrogen, Nitrogen, and Oxygen

Date: November 17, 1948
Creator: Hoge, Harold J.
Description: Two charts are given for each of the gases hydrogen, nitrogen, and oxygen. The first gives directly the number of standard cubic feet of the gas which a cylinder will deliver. The second chart gives values of the compressibility factor and of the density.
Contributing Partner: UNT Libraries Government Documents Department
The Modernized Metric System: the International System of Units (SI) and its Relationship to U.S. Customary Units

The Modernized Metric System: the International System of Units (SI) and its Relationship to U.S. Customary Units

Date: 1968
Creator: United States. National Bureau of Standards.
Description: Chart of the six base units of the modernized metric system, including length, time, mass, temperature, electric current, and luminous intensity.
Contributing Partner: UNT Libraries Government Documents Department
The Modernized Metric System: the International System of Units-SI

The Modernized Metric System: the International System of Units-SI

Date: August 1981
Creator: United States. National Bureau of Standards.
Description: Revised wall chart of the seven base units of the modernized metric system, including length, mass, time, electric current, temperature, amount of substance, luminous intensity, and plane angle.
Contributing Partner: UNT Libraries Government Documents Department
[Construction Drawings Using Copper, Brass, and Steel]

[Construction Drawings Using Copper, Brass, and Steel]

Date: 1948
Creator: Jorgensen
Description: Three charts of copper, brass, and steel construction for use in nuclear reactors.
Contributing Partner: UNT Libraries Government Documents Department
A Modified Decade Scaler: Final Report on Project Authorization Number CMR-3-5

A Modified Decade Scaler: Final Report on Project Authorization Number CMR-3-5

Date: June 9, 1949
Creator: Rupert, George N.
Description: Final report describing the development and usage of an automatic decade scaler which operates for a fixed number of counts, developed for use with a Geiger tube.
Contributing Partner: UNT Libraries Government Documents Department
Investigation of Lower Coal Beds in Georges Creek and North Part of Upper Potomac Basins, Allegany and Garrett Counties, Maryland: Reserves, Petrographic and Chemical Characteristics of Coals, and Stratigraphy of Area (Maps)

Investigation of Lower Coal Beds in Georges Creek and North Part of Upper Potomac Basins, Allegany and Garrett Counties, Maryland: Reserves, Petrographic and Chemical Characteristics of Coals, and Stratigraphy of Area (Maps)

Date: 1949
Creator: Toenges, Albert L.
Description: Series of eleven maps to illustrate coal mines in Maryland, to accompany a report about thinning in the coal beds.
Contributing Partner: UNT Libraries Government Documents Department
The Meaning of Specifications for Gasoline and Kerosene

The Meaning of Specifications for Gasoline and Kerosene

Date: November 1926
Creator: Kraemer, A. J.
Description: Report on how to identify good gasoline and kerosene, written for the average citizen, with an explanation of purchaser and supplier relationships.
Contributing Partner: UNT Libraries Government Documents Department
Educational Agencies in Mining Communities

Educational Agencies in Mining Communities

Date: April 1920
Creator: Read, T. T.
Description: Report on the importance of industrial education in the mining sector. It explains general education and facilities for specialized education for proficiency in a given field.
Contributing Partner: UNT Libraries Government Documents Department
Problems Facing Coal Mining and Gas Production in the Hartshorne Coalbeds of the Western Arkoma Basin, Oklahoma

Problems Facing Coal Mining and Gas Production in the Hartshorne Coalbeds of the Western Arkoma Basin, Oklahoma

Date: 1983
Creator: Iannacchione, Anthony T.
Description: This report provides pertinent geologic information for long-range planning of subsurface coal and gas production from the Hartshorne Coalbeds. Problems encountered include the complex distribution of minable and un-minable coal, high methane content and bed pressure, faulting, variations in degree of dip, presence of natural gas fields in associated sandstones, and legal problems.
Contributing Partner: UNT Libraries Government Documents Department
Nomographic Charts for Nuclear Reactions

Nomographic Charts for Nuclear Reactions

Date: 1944
Creator: McKibben, J. L.
Description: Charts that show neutron energy, laboratory or center of gravity angle, and bombarding energy for nuclear reactions.
Contributing Partner: UNT Libraries Government Documents Department
The Changeable Interaction between Soils and Pressure Cells: Tests and Reviews at the Waterways Experiment Station

The Changeable Interaction between Soils and Pressure Cells: Tests and Reviews at the Waterways Experiment Station

Date: June 1976
Creator: Hvorslev, Mikael Juul
Description: Partial abstract: "The principal subjects of the report are the often neglected changes in the interaction of soil and pressure cells with consequent changes in relative errors in cell registrations. The report contains (a) a brief account of the development and use of soil pressure cells; (b) a review of proposed theories for soil-cell interaction; (c) a delayed account of tests with Waterways Experiment Station pressure cells placed in a large triaxial device; and (d) tentative conclusions plus suggestions for calibration, installation, and measuring procedures."
Contributing Partner: UNT Libraries Government Documents Department
Design of a Precast Concrete Stay-in-Place Forming System for Lock Wall Rehabilitation

Design of a Precast Concrete Stay-in-Place Forming System for Lock Wall Rehabilitation

Date: July 1987
Creator: ABAM Engineers Incorporated
Description: Report describing the design of forming a system to use pre-cast concrete for rehabilitating damaged walls in locks, as a way to prevent problems with cracking in replacement air-entrained concrete used in standard methods.
Contributing Partner: UNT Libraries Government Documents Department
Development of Nondestructive Testing Systems for in situ Evaluation of Concrete Structures

Development of Nondestructive Testing Systems for in situ Evaluation of Concrete Structures

Date: December 1987
Creator: Thornton, Henry T., Jr. & Alexander, A. Michel
Description: Final report regarding the testing of concrete structures. Partial abstract: "The need for additional capability to nondestructively evaluate concrete in large structures is similar for both the US Army Corps of Engineers (CE) and the US Bureau of Reclamation (USBR). In view of this mutual need, the CE and the USBR entered into a cooperative program of research and development designed to increase the nondestructive testing evaluation capabilities of these two organizations, with each agency sharing the program planning and financial support."
Contributing Partner: UNT Libraries Government Documents Department
A Demonstration of the Constructibility of a Precast Concrete Stay-in-Place Forming System for Lock Wall Rehabilitation

A Demonstration of the Constructibility of a Precast Concrete Stay-in-Place Forming System for Lock Wall Rehabilitation

Date: December 1987
Creator: ABAM Engineers Incorporated
Description: Report describing a demonstration to evaluate the feasibility of the stay-in-place forming system to rehabilitate damaged lock walls as an alternative to the risk and investment of undertaking full-scale lock rehabilitiation.
Contributing Partner: UNT Libraries Government Documents Department
Concepts for Installation of the Precast Concrete Stay-in-Place Forming System for Lock Wall Rehabilitation in an Operational Lock

Concepts for Installation of the Precast Concrete Stay-in-Place Forming System for Lock Wall Rehabilitation in an Operational Lock

Date: December 1989
Creator: Waterways Experiment Station (U.S.)
Description: Report describing a study to extend the application of a method to rehabilitate damaged lock walls that uses a stay-in-place forming system. "During this study, operational and design criteria were developed to serve as the basis for design. A number of repair concepts were identified that satisfied the criteria" (abstract, para. 3).
Contributing Partner: UNT Libraries Government Documents Department
Comparison of Cast-in-Place Concrete Versus Precast Concrete Stay-in-Place Forming Systems for Lock Wall Rehabilitation

Comparison of Cast-in-Place Concrete Versus Precast Concrete Stay-in-Place Forming Systems for Lock Wall Rehabilitation

Date: October 1993
Creator: Miles, William R.
Description: "The objectives of this report are as follows: (a) To present the design and details utilized on the precast concrete panel rehabilitation at Troy Lock. (b) To compare the results of precast concrete panel rehabilitation with previous cast-in-place repairs, with respect to quality, cost, and schedule. (c) To recommend refinements in the details and methods of fabrication and erection of the precast panels, based on lessons learned from work performed at Troy Lock." (p. 2).
Contributing Partner: UNT Libraries Government Documents Department
Levee Underseepage Analysis for Special Foundation Conditions

Levee Underseepage Analysis for Special Foundation Conditions

Date: September 1989
Creator: Wolff, Thomas F.
Description: This report describes a research study in which techniques were developed for prediction of underseepage conditions for special cases of levee and foundation geometry. The differential equations for levee underseepage were derived and programmed in finite difference form for three special cases of boundary conditions. The developed programs allow analyses that are not restricted to the boundary conditions assumed in the conventional, closed form solution, i.e., two foundation layers of uniform thickness with horizontal boundaries.
Contributing Partner: UNT Libraries Government Documents Department
Geotechnical Applications of the Self-Potential Method, Report 3: Development of Self-Potential Interpretation Techniques for Seepage Detection

Geotechnical Applications of the Self-Potential Method, Report 3: Development of Self-Potential Interpretation Techniques for Seepage Detection

Date: February 1989
Creator: Corwin, Robert W. & Butler, Dwain K.
Description: This report consists of four distinct but complementary parts: (a) a laboratory/field study of environmental effects on self-potential (SP) electrodes and long-term stability of the electrodes; (b) field investigations at Beaver Dam, Arkansas; (c) development of a computer program for interpretation of seepage-related SP field survey data; (d) development of an extensive bibliography and data base for acquisition and interpretation of seepage-related SP data.
Contributing Partner: UNT Libraries Government Documents Department
Levee Underseepage Software: User Manual and Validation

Levee Underseepage Software: User Manual and Validation

Date: September 1989
Creator: Cunny, Robert W.; Agostinelli, Victor M., Jr. & Taylor, Hugh M., Jr.
Description: Report discussing the FORTRAN 77 computer program (LEVSEEP), developed to analyze levee underseepage on IBM PC compatible microcomputers with an 8087 math coprocessor. The software and associated equipment plots cross sections and piezometer data; calculates seepage flow and substratum pressure; analyzes landside berm, river side blanket, cutoff and relief well control measures; and finally, estimates the construction cost of these alternatives.
Contributing Partner: UNT Libraries Government Documents Department