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Financial Audit: American Battle Monuments Commission's Financial Statements for Fiscal Years 2006 and 2005 (open access)

Financial Audit: American Battle Monuments Commission's Financial Statements for Fiscal Years 2006 and 2005

A letter report issued by the Government Accountability Office with an abstract that begins "In accordance with 36 U.S.C. 2103, GAO is responsible for conducting audits of the agencywide financial statements of the American Battle Monuments Commission (the Commission). GAO audited the financial statements of the Commission for the fiscal years ended September 30, 2006, and 2005. The audits were done to determine whether, in all material respects, (1) the Commission's financial statements were presented fairly, and (2) Commission management maintained effective internal control over financial reporting and compliance with laws and regulations. Also, GAO tested Commission management's compliance with selected laws and regulations. The Commission was created in 1923 to commemorate the sacrifices and achievements of U.S. Armed Forces where they have served overseas since April 6, 1917, and locations within the United States as directed by Congress. The Commission designs, administers, operates, and maintains 24 American military cemeteries on foreign soil and 25 federal memorials, monuments, and markers, 22 of which are on foreign soil. The Commission was also responsible for designing and constructing the national World War II Memorial on the Capitol Mall in Washington, D.C., and for maintaining six nonfederal memorials with funds provided by those …
Date: March 1, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Great Lakes: EPA and States Have Made Progress in Implementing the BEACH Act, but Additional Actions Could Improve Public Health Protection (open access)

Great Lakes: EPA and States Have Made Progress in Implementing the BEACH Act, but Additional Actions Could Improve Public Health Protection

A letter report issued by the Government Accountability Office with an abstract that begins "Waterborne pathogens can contaminate water and sand at beaches and threaten human health. Under the Beaches Environmental Assessment and Coastal Health (BEACH) Act, the Environmental Protection Agency (EPA) developed limits on pathogens that states use to assess beach water quality. EPA can also provide grants to states to develop water quality monitoring and public notification programs. GAO was asked to assess (1) the extent to which EPA implemented the BEACH Act including how it allocated grants to the states, (2) the monitoring and notification programs developed by Great Lakes states, and (3) the effect of the BEACH Act on water quality monitoring and contamination at Great Lakes beaches."
Date: May 1, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Stabilizing and Rebuilding Iraq: U.S. Ministry Capacity Development Efforts Need an Overall Integrated Strategy to Guide Efforts and Manage Risk (open access)

Stabilizing and Rebuilding Iraq: U.S. Ministry Capacity Development Efforts Need an Overall Integrated Strategy to Guide Efforts and Manage Risk

A letter report issued by the Government Accountability Office with an abstract that begins "Iraq's ministries were decimated following years of neglect and centralized control under the former regime. Developing competent and loyal Iraqi ministries is critical to stabilizing and rebuilding Iraq. The President received $140 million in fiscal year 2007 funds and requested an additional $255 million in fiscal year 2008 to develop the capacity of the Iraq's ministries. This report assesses (1) the nature and extent of U.S. efforts to develop the capacity of the Iraqi ministries, (2) the key challenges to these efforts, and (3) the extent to which the U.S. government has an overall integrated strategy for these efforts. For this effort, GAO reviewed U.S. project contracts and reports and interviewed officials from the Departments of State (State), Defense (DOD), and the United States Agency for International Development (USAID) in Baghdad and Washington, D.C."
Date: October 1, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Hurricane Katrina: Agency Contracting Data Should Be More Complete Regarding Subcontracting Opportunities for Small Businesses (open access)

Hurricane Katrina: Agency Contracting Data Should Be More Complete Regarding Subcontracting Opportunities for Small Businesses

A letter report issued by the Government Accountability Office with an abstract that begins "In response to Hurricane Katrina, the Departments of Homeland Security (DHS) and Defense (DOD), the General Services Administration (GSA), and the U.S. Army Corps of Engineers (Corps) were responsible for 94 percent of the federal funds awarded for relief efforts via contracting as of May 2006. This report, which GAO conducted under the Comptroller General's Authority, describes (1) the amounts that small businesses received from prime contracts with these agencies, (2) the extent of subcontracting, (3) and the extent to which Disadvantaged Business Enterprises (DBEs) received Department of Transportation funds for Katrina-related projects. In conducting this study, GAO analyzed agency contract data, reviewed federal acquisition regulations, and interviewed agency procurement officials."
Date: March 1, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Organizational Transformation: Implementing Chief Operating Officer/Chief Management Officer Positions in Federal Agencies (open access)

Organizational Transformation: Implementing Chief Operating Officer/Chief Management Officer Positions in Federal Agencies

A letter report issued by the Government Accountability Office with an abstract that begins "Agencies across the federal government are embarking on large-scale organizational transformations to address 21st century challenges. One proposed approach to address systemic federal governance and management challenges involves the creation of a senior-level position--a chief operating officer (COO)/chief management officer (CMO)--in selected federal agencies to help elevate, integrate, and institutionalize responsibility for key management functions and business transformation efforts. GAO was asked to develop criteria and strategies for establishing and implementing COO/CMO positions in federal agencies. To do so, GAO (1) gathered information on the experiences and views of officials at four organizations with COO/CMO-type positions and (2) convened a forum to gather insights from individuals with experience in business transformation."
Date: November 1, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Wildland Fire Management: Lack of Clear Goals or a Strategy Hinders Federal Agencies' Efforts to Contain the Costs of Fighting Fires (open access)

Wildland Fire Management: Lack of Clear Goals or a Strategy Hinders Federal Agencies' Efforts to Contain the Costs of Fighting Fires

A letter report issued by the Government Accountability Office with an abstract that begins "Annual appropriations to prepare for and respond to wildland fires have increased substantially over the past decade, in recent years totaling about $3 billion. The Forest Service within the Department of Agriculture and four agencies within the Department of the Interior (Interior) are responsible for responding to wildland fires on federal lands. GAO determined what steps federal agencies have taken, in response to findings from previous studies, to (1) address key operational areas that could help contain the costs of preparing for and responding to wildland fires and (2) improve their management of their cost-containment efforts. To address these objectives, GAO reviewed previous cost-containment studies and other agency documents and interviewed agency officials."
Date: June 1, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
District of Columbia Opportunity Scholarship Program: Additional Policies and Procedures Would Improve Internal Controls and Program Operations (open access)

District of Columbia Opportunity Scholarship Program: Additional Policies and Procedures Would Improve Internal Controls and Program Operations

A letter report issued by the Government Accountability Office with an abstract that begins "The D.C. School Choice Incentive Act created the first private kindergarten-through-grade-12 school-choice program supported by federal funds. The program was named the D.C. Opportunity Scholarship Program (OSP). GAO was asked to assess the (1) accountability mechanisms governing the use of funds, (2) results of the grantee's efforts to meet the program's recruiting priorities and eligibility requirements and inform parents of their choices, and (3) extent that the evaluation of OSP reflects statutory requirements and the implementation of the program supported the detection of useful and generalizable findings. To assess the program, GAO analyzed financial, program, and evaluation data. GAO did not assess the performance of participating private schools nor did GAO evaluate the impact of the program."
Date: November 1, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Addendum to the Closure Report for Corrective Action Unit 92: Area 6 Decon Pond Facility, Nevada Test Site, Nevada (open access)

Addendum to the Closure Report for Corrective Action Unit 92: Area 6 Decon Pond Facility, Nevada Test Site, Nevada

The following is an addendum to the 'Closure Report for Corrective Action Unit 92: Area 6 Decontamination Pond, Nevada Test Site, Nevada', DOE/NV/11718--306, dated April 1999. This addendum includes Use Restriction Information forms and survey maps for CAS 06-04-01, Decon Pad Oil/Water Separator, and CAS 06-05-02, Decontamination Pond (RCRA), that were inadvertently left out of the Closure Report when it was published as a final document.
Date: June 1, 2007
Creator: National Security Technologies, LLC
System: The UNT Digital Library
A New Innovative Spherical Cermet Nuclear Fuel Element to Achieve an Ultra-Long Core Life for use in Grid-Appropriate LWRs (open access)

A New Innovative Spherical Cermet Nuclear Fuel Element to Achieve an Ultra-Long Core Life for use in Grid-Appropriate LWRs

Spherical cermet fuel elements are proposed for use in the Atoms For Peace Reactor (AFPR-100) concept. AFPR-100 is a small-scale, inherently safe, proliferation-resistant reactor that would be ideal for deployment to nations with emerging economies that decide to select nuclear power for the generation of carbon-free electricity. The basic concept of the AFPR core is a water-cooled fixed particle bed, randomly packed with spherical fuel elements. The flow of coolant within the particle bed is at such a low rate that the bed does not fluidize. This report summarizes an approach to fuel fabrication, results associated with fuel performance modeling, core neutronics and thermal hydraulics analyses demonstrating a ~20 year core life, and a conclusion that the proliferation resistance of the AFPR reactor concept is high.
Date: December 1, 2007
Creator: Senor, David J.; Painter, Chad L.; Geelhood, Ken J.; Wootan, David W.; Meriwether, George H.; Cuta, Judith M. et al.
System: The UNT Digital Library
Strategic Plan for Sustainable Energy Management and Environmental Stewardship for Los Angeles Unified School District (open access)

Strategic Plan for Sustainable Energy Management and Environmental Stewardship for Los Angeles Unified School District

This Strategic Plan for Sustainable Energy Management and Environmental Stewardship states goals, measures progress toward goals and how actions are monitored to achieve continuous improvement for the Los Angeles Unified School District.
Date: November 1, 2007
Creator: Walker, A.; Beattie, D.; Thomas, K.; Davis, K.; Sim, M. & Jhaveri, A.
System: The UNT Digital Library
A vadose zone Transport Processes Investigation within the glacial till at the Fernald Environmental Management Project. (open access)

A vadose zone Transport Processes Investigation within the glacial till at the Fernald Environmental Management Project.

This report describes a model Transport Processes Investigation (TPI) where field-scale vadose zone flow and transport processes are identified and verified through a systematic field investigation at a contaminated DOE site. The objective of the TPI is to help with formulating accurate conceptual models and aid in implementing rational and cost effective site specific characterization strategies at contaminated sites with diverse hydrogeologic settings. Central to the TPI are Transport Processes Characterization (TPC) tests that incorporate field surveys and large-scale infiltration experiments. Hypotheses are formulated based on observed pedogenic and hydrogeologic features as well as information provided by literature searches. The field and literature information is then used to optimize the design of one or more infiltration experiments to field test the hypothesis. Findings from the field surveys and infiltration experiments are then synthesized to formulate accurate flow and transport conceptual models. Here we document a TPI implemented in the glacial till vadose zone at the Fernald Environmental Management Project (FEMP) in Fernald, Ohio, a US Department of Energy (DOE) uranium processing site. As a result of this TPI, the flow and transport mechanisms were identified through visualization of dye stain within extensive macro pore and fracture networks which provided the …
Date: August 1, 2007
Creator: Schwing, J. (FERMCO Technology Development, Cincinnati, OH); Roepke, Craig Senninger; Brainard, James Robert; Glass, Robert John, Jr.; Mann, Michael J. A.; Holt, Robert M. et al.
System: The UNT Digital Library
A Survey of the U.S. ESCO Industry: Market Growth and Developmentfrom 2000 to 2006 (open access)

A Survey of the U.S. ESCO Industry: Market Growth and Developmentfrom 2000 to 2006

None
Date: May 1, 2007
Creator: Hopper, Nicole; Goldman, Charles; Gilligan, Donald; Singer, TerryE. & Birr, Dave
System: The UNT Digital Library
Final Report on Control Algorithm to Improve the Partial-Load Efficiency of Surface PM Machines with Fractional-Slot Concentrated Windings (open access)

Final Report on Control Algorithm to Improve the Partial-Load Efficiency of Surface PM Machines with Fractional-Slot Concentrated Windings

Surface permanent magnet (SPM) synchronous machines using fractional-slot concentrated windings are being investigated as candidates for high-performance traction machines for automotive electric propulsion systems. It has been shown analytically and experimentally that such designs can achieve very wide constant-power speed ratios (CPSR) [1,2]. This work has shown that machines of this type are capable of achieving very low cogging torque amplitudes as well as significantly increasing the machine power density [3-5] compared to SPM machines using conventional distributed windings. High efficiency can be achieved in this class of SPM machine by making special efforts to suppress the eddy-current losses in the magnets [6-8], accompanied by efforts to minimize the iron losses in the rotor and stator cores. Considerable attention has traditionally been devoted to maximizing the full-load efficiency of traction machines at their rated operating points and along their maximum-power vs. speed envelopes for higher speeds [9,10]. For example, on-line control approaches have been presented for maximizing the full-load efficiency of PM synchronous machines, including the use of negative d-axis stator current to reduce the core losses [11,12]. However, another important performance specification for electric traction applications is the machine's efficiency at partial loads. Partial-load efficiency is particularly important if …
Date: May 1, 2007
Creator: McKeever, John W; Reddy, Patel & Jahns, Thomas M
System: The UNT Digital Library
Presto user's guide 2.7 (version 1). (open access)

Presto user's guide 2.7 (version 1).

None
Date: May 1, 2007
Creator: Gullerud, Arne S.; Hales, Jason Dean; Koteras, James Richard; Reinert, Rhonda K. & Crane, Nathan Karl
System: The UNT Digital Library
Commercial-Scale Performance Predictions for High-Temperature Electrolysis Plants Coupled to Three Advanced Reactor Types (open access)

Commercial-Scale Performance Predictions for High-Temperature Electrolysis Plants Coupled to Three Advanced Reactor Types

This report presents results of system analyses that have been developed to assess the hydrogen production performance of commercial-scale high-temperature electrolysis (HTE) plants driven by three different advanced reactor – power-cycle combinations: a high-temperature helium cooled reactor coupled to a direct Brayton power cycle, a supercritical CO2-cooled reactor coupled to a direct recompression cycle, and a sodium-cooled fast reactor coupled to a Rankine cycle. The system analyses were performed using UniSim software. The work described in this report represents a refinement of previous analyses in that the process flow diagrams include realistic representations of the three advanced reactors directly coupled to the power cycles and integrated with the high-temperature electrolysis process loops. In addition, this report includes parametric studies in which the performance of each HTE concept is determined over a wide range of operating conditions. Results of the study indicate that overall thermal-to- hydrogen production efficiencies (based on the low heating value of the produced hydrogen) in the 45 - 50% range can be achieved at reasonable production rates with the high-temperature helium cooled reactor concept, 42 - 44% with the supercritical CO2-cooled reactor and about 33 - 34% with the sodium-cooled reactor.
Date: September 1, 2007
Creator: McKellar, M. G.; O'Brien, J. E. & Herring, J. S.
System: The UNT Digital Library
Idaho National Laboratory/Nuclear Power Industry Strategic Plan for Light Water Reactor Research and Development An Industry-Government Partnership to Address Climate Change and Energy Security (open access)

Idaho National Laboratory/Nuclear Power Industry Strategic Plan for Light Water Reactor Research and Development An Industry-Government Partnership to Address Climate Change and Energy Security

The dual issues of energy security and climate change mitigation are driving a renewed debate over how to best provide safe, secure, reliable and environmentally responsible electricity to our nation. The combination of growing energy demand and aging electricity generation infrastructure suggests major new capacity additions will be required in the years ahead.
Date: November 1, 2007
Creator: Research, Electric Power
System: The UNT Digital Library
Strengthening the foundations of proliferation assessment tools. (open access)

Strengthening the foundations of proliferation assessment tools.

Robust and reliable quantitative proliferation assessment tools have the potential to contribute significantly to a strengthened nonproliferation regime and to the future deployment of nuclear fuel cycle technologies. Efforts to quantify proliferation resistance have thus far met with limited success due to the inherent subjectivity of the problem and interdependencies between attributes that lead to proliferation resistance. We suggest that these limitations flow substantially from weaknesses in the foundations of existing methodologies--the initial data inputs. In most existing methodologies, little consideration has been given to the utilization of varying types of inputs--particularly the mixing of subjective and objective data--or to identifying, understanding, and untangling relationships and dependencies between inputs. To address these concerns, a model set of inputs is suggested that could potentially be employed in multiple approaches. We present an input classification scheme and the initial results of testing for relationships between these inputs. We will discuss how classifying and testing the relationship between these inputs can help strengthen tools to assess the proliferation risk of nuclear fuel cycle processes, systems, and facilities.
Date: September 1, 2007
Creator: Rexroth, Paul E.; Saltiel, David H.; Rochau, Gary Eugene; Cleary, Virginia D.; Ng, Selena (AREVA NC, Paris, France); Greneche, Dominique (AREVA NC, Paris, France) et al.
System: The UNT Digital Library
Loads Providing Ancillary Services: Review of InternationalExperience-- Technical Appendix: Market Descriptions (open access)

Loads Providing Ancillary Services: Review of InternationalExperience-- Technical Appendix: Market Descriptions

In this study, we examine the arrangements for andexperiences of end-use loads providing ancillary services (AS) in fiveelectricity markets: Australia, the United Kingdom (UK), the Nordicmarket, and the ERCOT and PJM markets in the United States. Our objectivein undertaking this review of international experience was to identifyspecific approaches or market designs that have enabled customer loads toeffectively deliver various ancillary services (AS) products. We hopethat this report will contribute to the ongoing discussion in the U.S.and elsewhere regarding what institutional and technical developments areneeded to ensure that customer loads can meaningfully participate in allwholesale electricity markets.
Date: May 1, 2007
Creator: Grayson Heffner, Charles Goldman, Kintner-Meyer, M & Kirby, Brendan
System: The UNT Digital Library
Shillapoo Wildlife Area, Annual Report 2007-2008. (open access)

Shillapoo Wildlife Area, Annual Report 2007-2008.

This report summarizes accomplishments, challenges and successes on WDFW's Shillapoo Wildlife Area funded under Bonneville Power Administration's (BPA) Wildlife Mitigation Program (BPA project No.2003-012-00) during the Fiscal Year 08 contract period October 1, 2007-September 30, 2008. The information presented here is intended to supplement that contained in BPA's PISCES contract development and reporting system. The organization below is by broad categories of work but references are made to individual work elements in the PISCES Statement of Work as appropriate. Significant progress was realized in almost all major work types. Of particular note was progress made in tree plantings and pasture rehabilitation efforts. This year's tree planting effort included five sites detailed below and in terms of the number of plants was certainly the largest effort on the wildlife area to date in one season. The planting itself took a significant amount of time, which was anticipated. However, installation of mats and tubes took much longer than expected which impacted planned fence projects in particular. Survival of the plantings appears to be good. Improvement to the quality of waterfowl pasture habitats is evident on a number of sites due to replanting and weed control efforts. Continuing long-term weed control efforts will …
Date: October 1, 2007
Creator: Calkins, Brian
System: The UNT Digital Library
Use of composite materials, health monitoring and self-healing concepts to refurbish our civil and military infrastructure. (open access)

Use of composite materials, health monitoring and self-healing concepts to refurbish our civil and military infrastructure.

An unavoidable by-product of a metallic structure's use is the appearance of crack, corrosion, erosion and other flaws. Economic barriers to the replacement of these structures have created an aging civil and military infrastructure and placed even greater demands on efficient and safe repair and inspection methods. As a result of Homeland Security issues and these aging infrastructure concerns, increased attention has been focused on the rapid repair and preemptive reinforcement of structures such as buildings and bridges. This Laboratory Directed Research and Development (LDRD) program established the viability of using bonded composite patches to repair metallic structures. High modulus fiber-reinforced polymer (FRP) material may be used in lieu of mechanically fastened metallic patches or welds to reinforce or repair damaged structures. Their use produces a wide array of engineering and economic advantages. Current techniques for strengthening steel structures have several drawbacks including requiring heavy equipment for installation, poor fatigue performance, and the need for ongoing maintenance due to continued corrosion attack or crack growth. The use of bonded composite doublers has the potential to correct the difficulties associated with current repair techniques and the ability to be applied where there are currently no rehabilitation options. Applications include such diverse …
Date: September 1, 2007
Creator: Roach, Dennis Patrick; Delong, Waylon Anthony; White, Scott (University of Illinois, Urbana, Illinois); Yepez, Esteban; Rackow, Kirk A. & Reedy, Earl David, Jr.
System: The UNT Digital Library
WIPP Gas-Generation Experiments (open access)

WIPP Gas-Generation Experiments

An experimental investigation was conducted for gas generation in contact-handled transuranic (CH TRU) wastes subjected for several years to conditions similar to those expected to occur at the Waste Isolation Pilot Plant (WIPP) should the repository eventually become inundated with brine. Various types of actual CH TRU wastes were placed into 12 corrosion-resistant vessels. The vessels were loosely filled with the wastes, which were submerged in synthetic brine having the same chemical composition as that in the WIPP vicinity. The vessels were also inoculated with microbes found in the Salado Formation at WIPP. The vessels were sealed, purged, and the approximately 750 ml headspace in each vessel was pressurized with nitrogen gas to approximately 146 atmospheres to create anoxic conditions at the lithostatic pressure estimated in the repository were it to be inundated. The temperature was maintained at the expected 30°C. The test program objective was to measure the quantities and species of gases generated by metal corrosion, radiolysis, and microbial activity. These data will assist in the specification of the rates at which gases are produced under inundated repository conditions for use in the WIPP Performance Assessment computer models. These experiments were very carefully designed, constructed, instrumented, and performed. …
Date: May 1, 2007
Creator: Felicione, Frank S.; Frank, Steven M. & Keiser, Dennis D.
System: The UNT Digital Library
Power conversion from environmentally scavenged energy sources. (open access)

Power conversion from environmentally scavenged energy sources.

As the power requirements for modern electronics continue to decrease, many devices which were once dependent on wired power are now being implemented as portable devices operating from self-contained power sources. The most prominent source of portable power is the electrochemical battery, which converts chemical energy into electricity. However, long lasting batteries require large amounts of space for chemical storage, and inevitably require replacement when the chemical reaction no longer takes place. There are many transducers and scavenging energy sources (SES) that are able to exploit their environment to generate low levels of electrical power over a long-term time period, including photovoltaic cells, thermoelectric generators, thermionic generators, and kinetic/piezoelectric power generators. This generated power is sustainable as long as specific environmental conditions exist and also does not require the large volume of a long lifetime battery. In addition to the required voltage generation, stable power conversion requires excess energy to be efficiently stored in an ultracapacitor or similar device and monitoring control algorithms to be implemented, while computer modeling and simulation can be used to complement experimental testing. However, building an efficient and stable power source scavenged from a varying input source is challenging.
Date: September 1, 2007
Creator: Druxman, Lee Daniel
System: The UNT Digital Library
Plastic Straining of Iridium Alloy DOP-26 During Cup Sizing Operations (open access)

Plastic Straining of Iridium Alloy DOP-26 During Cup Sizing Operations

DOP-26 iridium alloy cups are used for fuel cladding for radioisotope power systems. The cups are deep drawn and recrystallized prior to final fabrication operations. This study characterizes the plastic deformation of cups during a sizing operation following the recrystallization heat treatment. The purpose of the sizing operation is to achieve the specified roundness, diameter, and radius dimensions of the cup. The operation introduces various levels of plastic strain in the cup. Plastic strain can be a cause of inhomogeneous or abnormal grain growth during subsequent exposure to elevated temperature during the service life of the fueled clad. This is particularly true in the case of cups which have irregularities in the cup walls from the deep drawing operations. Diameter and roundness measurements were made on two cups both before and after sizing. Plastic strain levels were calculated using the ABAQUSTM finite element software. The calculated plastic strain levels in both cups were below 0.025, a value shown to be below the critical strain for abnormal grain growth during a simulated service exposure. The calculated maximum plastic strain was found to increase with increased applied sizing load and was not sensitive to the input value for the clearance between the …
Date: September 1, 2007
Creator: Ohriner, Evan Keith; Ulrich, George B & Sabau, Adrian S
System: The UNT Digital Library
Sonar atlas of caverns comprising the U.S. Strategic Petroleum Reserve. Volume 3, Bryan Mound Site, Texas. (open access)

Sonar atlas of caverns comprising the U.S. Strategic Petroleum Reserve. Volume 3, Bryan Mound Site, Texas.

Downhole sonar surveys from the four active U.S. Strategic Petroleum Reserve sites have been modeled and used to generate a four-volume sonar atlas, showing the three-dimensional geometry of each cavern. This volume 3 focuses on the Bryan Mound SPR site, located in southeastern Texas. Volumes 1, 2, and 4, respectively, present images for the Bayou Choctaw SPR site, Louisiana, the Big Hill SPR site, Texas, and the West Hackberry SPR site, Louisiana. The atlas uses a consistent presentation format throughout. The basic geometric measurements provided by the down-cavern surveys have also been used to generate a number of geometric attributes, the values of which have been mapped onto the geometric form of each cavern using a color-shading scheme. The intent of the various geometrical attributes is to highlight deviations of the cavern shape from the idealized cylindrical form of a carefully leached underground storage cavern in salt. The atlas format does not allow interpretation of such geometric deviations and anomalies. However, significant geometric anomalies, not directly related to the leaching history of the cavern, may provide insight into the internal structure of the relevant salt dome.
Date: September 1, 2007
Creator: Rautman, Christopher Arthur & Lord, Anna Snider
System: The UNT Digital Library