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Articles 3811 - 3840 of 7344

Full-Text Articles in Physical Sciences and Mathematics

Mineralogical Characterization Of Protolith And Fault Rocks From The Safod Main Hole, John G. Solum, Stephen H. Hickman, David A. Lockner, Diane E. Moore, Ben A. Van Der Pluijm, Anja M. Schleicher, James P. Evans Jan 2006

Mineralogical Characterization Of Protolith And Fault Rocks From The Safod Main Hole, John G. Solum, Stephen H. Hickman, David A. Lockner, Diane E. Moore, Ben A. Van Der Pluijm, Anja M. Schleicher, James P. Evans

Geosciences Faculty Publications

Washed cuttings provide a continuous record of the rocks encountered during drilling of the main hole of the San Andreas Fault Observatory at Depth (SAFOD). Both protolith and fault rocks exhibit a wide variety of mineral assemblages that reflect variations in some combination of lithology, P-T conditions, deformation mechanisms, and fluid composition and abundance. Regions of distinct neomineralization bounded by faults may record alteration associated with fluid reservoirs confined by faults. In addition, both smectites occurring as mixed-layer phases and serpentine minerals are found in association with active strands of the San Andreas Fault that were intersected during drilling, although …

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An Examination Of External Influences Imbedded In The Historical Snow Data Of Utah, Randall P. Julander, Michael Bricco Jan 2006

An Examination Of External Influences Imbedded In The Historical Snow Data Of Utah, Randall P. Julander, Michael Bricco

All U.S. Government Documents (Utah Regional Depository)

Snowpack data collection has a long and storied history in Utah as well as the western United States. Many researchers use historical snow course data for various applications ranging from water supply forecasting to climate change. These data are far from a perfect data set and data users should know the errors and limitations within them. In the current setting, only those collecting the data have access to the raw data and the site biographical information. In Utah, records extend back to at least 1912. Systematic measurements began in the mid 1920's with many long term snow courses established at …

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Record Of Decision: Operation Of Flaming Gorge Dam Final Environmental Impact Statement, U.S. Bureau Of Reclamation Jan 2006

Record Of Decision: Operation Of Flaming Gorge Dam Final Environmental Impact Statement, U.S. Bureau Of Reclamation

All U.S. Government Documents (Utah Regional Depository)

The Bureau of Reclamation (Reclamation) has completed a final environmental impact statement (EIS) on the operation of Flaming Gorge Dam. The EIS describes the potential effects of modifying the operation of Flaming Gorge Dam to assist in the recovery of four endangered fish, and their critical habitat, downstream from the dam. The four endangered fish species are Colorado pikeminnow (Ptychocheilus lucius), humpback chub (Gila cypha), razorback sucker (Xyrauchen texanus), and bonytail (Gila elegans). Reclamation would implement the proposed action by modifying the operations of Flaming Gorge Dam, to the extent possible, to achieve the flows and temperatures recommended by participants …

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Revegetation Of Reconstructed Reaches Of The Provo River, Heber Valley, Utah, John A. Rice Jan 2006

Revegetation Of Reconstructed Reaches Of The Provo River, Heber Valley, Utah, John A. Rice

All U.S. Government Documents (Utah Regional Depository)

Prior to the 1950s, the middle Provo River in Utah offered outstanding fish and wildlife habitat. This was due in part to the Provo River freely meandering through the Heber Valley. These bends in the river provided deep holes for fish and a dense streamside forest for many species of birds. This productive habitat was altered in the 1940s and 1950s when the river was dammed, channelized, and forced between dikes (figure 1). These dikes were constructed by the USDI Bureau of Reclamation (USBR) to contain high flows that came from additional water added to the Provo River from transbasin …

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Agro-Pastoralists’ Wrath For The Prosopis Tree: The Case Of The Il Chamus Of Baringo District, Kenya, D. Layne Coppock, Abdillahi A. Aboud, Phillip K. Kisoyan Dec 2005

Agro-Pastoralists’ Wrath For The Prosopis Tree: The Case Of The Il Chamus Of Baringo District, Kenya, D. Layne Coppock, Abdillahi A. Aboud, Phillip K. Kisoyan

Environment and Society Faculty Publications

Indigenous to Peru, Chile, and Argentina, the woody plant called Prosopis juliflora (also known by the American common name of “Honey Mesquite”) has spread world-wide in recent decades, including rangelands throughout Latin America, North America, south and central Asia, Australia, and sub-Saharan Africa. A species known for rapid establishment, high adaptability, and fast rates of growth, its dispersal has primarily been a consequence of intentional introduction by well- meaning “technical experts” who wanted to provide a new source of fodder, fuel wood, or a means to combat desertification in arid and semi-arid lands. One problem, however, is that unless Prosopis …

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Plant Information Compiled By The Utah Natural Heritage Program: A Progress Report, M. A. Franklin, State Of Utah Department Of Natural Resources Dec 2005

Plant Information Compiled By The Utah Natural Heritage Program: A Progress Report, M. A. Franklin, State Of Utah Department Of Natural Resources

All U.S. Government Documents (Utah Regional Depository)

The Utah Natural Heritage Program (UTHP) was initiated in late summer 1988 and has functioned as an ongoing biological survey of the state with an emphasis on rare or declining species. It serves as a centralized data repository, acquiring range wide information regarding rare plant and animal species for use by land managers as well as for the evaluation of conservation needs. As well as being used by government agencies, data are used in responding to requests for information from non-government organizations and private interests. Data can be used in the assessment of species’ conservation status state-wide and, in coordination …

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Linking Pastoralists And Exporters In A Livestock Marketing Chain: Recent Experiences From Ethiopia, D. Layne Coppock, Solomon Desta, Getachew Gebru, Seyoum Tezera Dec 2005

Linking Pastoralists And Exporters In A Livestock Marketing Chain: Recent Experiences From Ethiopia, D. Layne Coppock, Solomon Desta, Getachew Gebru, Seyoum Tezera

Environment and Society Faculty Publications

The Boran of southern Ethiopia have been traditionally viewed as unwilling or unable to engage in large scale, commercialized livestock trade. Here we report on the creation of a new livestock marketing chain from the Borana Plateau to export outlets largely serving the Gulf States. Since 2003 various meetings and exchange tours were organized by collaborating agencies and PARIMA to directly link pastoral producers with livestock exporters and policy makers. This occurred against a backdrop of growing export demand for small ruminants, rapid development of private export industry, formation of well-trained pastoral marketing groups (often dominated by women), and provision …

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Degree Of Sedentarization Affects Risks And Conflicts For The Waso Boran In Northern Kenya, D. Layne Coppock, Abdullahi D. Jillo, Mark N. Mutinda, Abdilla A. Aboud Dec 2005

Degree Of Sedentarization Affects Risks And Conflicts For The Waso Boran In Northern Kenya, D. Layne Coppock, Abdullahi D. Jillo, Mark N. Mutinda, Abdilla A. Aboud

Environment and Society Faculty Publications

The Waso Borana have lived for over a century in northern Kenya. In the last few decades, however, their ability to maintain their traditions has been severely challenged. Here we report survey results from 540 households in Isiolo District, stratified among three groups differing in terms of lifestyle: sedentary, semi-sedentary, and mobile. In some cases these groups vary with respect to important perceived risks, causes of natural-resource related conflict, and possible solutions to conflict. For example, sedentary respondents often noted concerns over land tenure problems, human diseases, and political incitement. Mobile respondents, in contrast, often noted primary concerns over drought, …

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Climatology Of F Region Zonalplasma Drifts Over Jicamarca, Bela G. Fejer, J. R. Souza, A. S. Santos, A. E. Costa Pereira Dec 2005

Climatology Of F Region Zonalplasma Drifts Over Jicamarca, Bela G. Fejer, J. R. Souza, A. S. Santos, A. E. Costa Pereira

Bela G. Fejer

[1] We use extensive incoherent scatter radar observations made at the Jicamarca Radio Observatory between 1970 and 2003 to study and model empirically the equatorial zonal plasma drifts near the F region peak using Bernstein polynomials as base functions. Our quiet-time model results confirm that the daytime drifts are westward and are nearly season and solar cycle independent. The nighttime drifts are eastward, have larger magnitudes, and increase strongly with solar flux, particularly near equinox and December solstice. Enhanced geomagnetic activity drives small eastward perturbation drifts during the day and much larger westward disturbance drifts at night. The nighttime drift …

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Final Environmental Assessment And Finding Of No Significant Impact For The Proposed Safety Of Dams Modifications And Bridge Reconstruction, Provo Area Office, Upper Colorado Region, Bureau Of Reclamation, U.S. Department Of Transportation, Utah Division, Federal Highway Administration, U.S. Department Of The Interior Dec 2005

Final Environmental Assessment And Finding Of No Significant Impact For The Proposed Safety Of Dams Modifications And Bridge Reconstruction, Provo Area Office, Upper Colorado Region, Bureau Of Reclamation, U.S. Department Of Transportation, Utah Division, Federal Highway Administration, U.S. Department Of The Interior

All U.S. Government Documents (Utah Regional Depository)

The Bureau of Reclamation, Provo Area Office (Reclamation) proposes to replace the concrete spillway structure at Scofield Dam, the principal feature of the Scofield Project. This construction project would be completed under the Safety of Dams (SOD) Act of 1978 (Public Law 95-578, as amended). The proposed SOD modifications would correct safety deficiencies of the dam without affecting the purpose, or benefits of the dam. Reclamation also proposes to replace the existing gate house at its current position on the crest of the dam. This building is in poor condition and would be replaced with either a new concrete structure …

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Natural Flow And Salt Computation Methods, Calendar Years 1971-1995, James Prairie, Russell Callejo Dec 2005

Natural Flow And Salt Computation Methods, Calendar Years 1971-1995, James Prairie, Russell Callejo

All U.S. Government Documents (Utah Regional Depository)

This paper documents the steps taken to compute natural flow and salt in the Upper and Lower Colorado River Basins from 1971-1995. Natural flow and salt data are hydrologic input data required in the CRSS planning model. The methods used to compute natural flow and salt described in this paper have changed from previous methods as a result of recent research. This research found data and methodological inconsistency in past methods to compute natural flow and salt was compared to data and methods used in the CRSS planning model (Prairie and Fulp, 1999). To assure the computation of natural flow …

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Mathematical Functions: An Interactive Emodule, Sarah Jean Moody Dec 2005

Mathematical Functions: An Interactive Emodule, Sarah Jean Moody

Undergraduate Honors Capstone Projects

The National Library of Virtual Manipulatives (NLVM, http://nlvm.usu.edu/) is a widely used and highly praised teaching/learning resource for school mathematics. The NLVM is the result of a four-year USU project, funded primarily by the National Science Foundation, Award #9819107, to create a web-based, freely accessible, library of interactive virtual manipulatives to help students learn basic mathematics concepts. During a typical school day, the NLVM server receives more than 3 million hits.

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Assimilative Modeling Of The Equatorial Ionosphere For Scintillation Forecasting: Modeling With Vertical Drifts, J. M. Retterer, D. T. Decker, W. S. Borer, R. E. Daniell, Bela G. Fejer Nov 2005

Assimilative Modeling Of The Equatorial Ionosphere For Scintillation Forecasting: Modeling With Vertical Drifts, J. M. Retterer, D. T. Decker, W. S. Borer, R. E. Daniell, Bela G. Fejer

Bela G. Fejer

[1] Knowledge of the vertical plasma drift velocity observed by the Jicamarca incoherent radar in seven events is assimilated into a theoretical model for the ambient F region plasma density. Comparisons of the calculated plasma density model and the observed plasma density show that, apart from the signature effects of equatorial plasma bubbles, the ambient model captures much of the detail of the plasma density profiles. Rayleigh-Taylor growth rates calculated with the ambient model show a good correlation with the occurrence of spread F.

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Diuron Ecological Risk Assessment, Bureau Of Land Management Nov 2005

Diuron Ecological Risk Assessment, Bureau Of Land Management

All U.S. Government Documents (Utah Regional Depository)

The United States Department of the Interior (USDI) Bureau of Land Management (BLM) is proposing a program to treat vegetation on up to six million acres of public lands annually in 17 western states in the continental United States (US) and Alaska. As part of this program, the BLM is proposing the use of ten herbicide active ingredients (a.i.) to control invasive plants and noxious weeds on approximately one million of the 6 million acres proposed for treatment. The BLM and its contractor, ENSR, are preparing a Vegetation Treatments Programmatic Environmental Impact Statement (EIS) to evaluate this and other proposed …

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Fluridone Ecological Risk Assessment, Final Report, Ensr International Nov 2005

Fluridone Ecological Risk Assessment, Final Report, Ensr International

All U.S. Government Documents (Utah Regional Depository)

The Bureau of Land Management (BLM), United States Department of the Interior (USDI), is proposing a program to treat vegetation on up to six million acres of public lands annually in 17 western states in the continental United States (U.S.) and Alaska. As part of this program, the BLM is proposing the use of ten herbicide active ingredients (a.i.) to control invasive plants and noxious weeds on approximately one million of the 6 million acres proposed for treatment. The BLM and its contracto, ENSR, are preparing a Vegetation Treatments Programmatic Environmental Impact Statement (EIS) to evaluate this and other proposed …

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Vegetation Treatments On Bureau Of Land Management Lands In 17 Western States, Bureau Of Land Management Nov 2005

Vegetation Treatments On Bureau Of Land Management Lands In 17 Western States, Bureau Of Land Management

All U.S. Government Documents (Utah Regional Depository)

No abstract provided.

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Richfield Fire Management Plan Environmental Assessment, U.S. Department Of The Interior, Bureau Of Land Management Nov 2005

Richfield Fire Management Plan Environmental Assessment, U.S. Department Of The Interior, Bureau Of Land Management

All U.S. Government Documents (Utah Regional Depository)

This Environmental Assessment (EA) documents results of an analysis of proposed changes to the current management of wildland fire and hazardous fuels for the Bureau of Land Management (BLM) Richfield Support Center. Proposed revisions of the Richfield Fire Management Plan (FMP) serve as the “Proposed Action” for this EA. The revised FMP incorporates current planning requirements associated with fire management on public lands, including wildland fire management and fuel treatments. The EA analysis is designed to ensure compliance with the National Environmental Policy Act (NEPA). It allows determinations to be made as to whether any “significant,” as defined by the …

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Moab Fire District Fire Management Plan: Environmental Assessment, U.S. Department Of The Interior, Bureau Of Land Management Nov 2005

Moab Fire District Fire Management Plan: Environmental Assessment, U.S. Department Of The Interior, Bureau Of Land Management

All U.S. Government Documents (Utah Regional Depository)

This Environmental Assessment (EA) has been prepared to document results of an analysis of proposed changes to current management of wildland fire and hazardous fuels for the Bureau of Land Management (BLM), Division of Fire Management. The Division of Fire Management oversees all fire-related activities for the Moab, Monticello, and Price Field Offices, referred to in this document as the Moab Fire District. Proposed revisions of the Moab Fire District Fire Management Plan (FMP) serve as the Proposed Action for this EA. The revised FMP incorporates current planning requirements associated with fire management on public lands, including wildland fire suppression …

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Diflufenzopyr Ecological Risk Assessment, Final Report, Bureau Of Land Management Nov 2005

Diflufenzopyr Ecological Risk Assessment, Final Report, Bureau Of Land Management

All U.S. Government Documents (Utah Regional Depository)

The Bureau of Land Management (BLM), United States Department of the Interior (USDI), is proposing a program to treat vegetation on up to six million acres of public lands annually in 17 western states in the continental United States (U.S.) and Alaska. As part of this program, the BLM is proposing the use of ten herbicide active ingredients (a.i.) to control invasive plants and noxious weeds on approximately one million of the 6 million acres proposed for treatment. The BLM and its contractor, ENSR, are preparing a Vegetation Treatments Programmatic Environmental Impact Statement (EIS) to evaluate this and other proposed …

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Southern Utah Support Area Fire Management Plan Environmental Assessment, United States Department Of The Interior, Bureau Of Land Management Nov 2005

Southern Utah Support Area Fire Management Plan Environmental Assessment, United States Department Of The Interior, Bureau Of Land Management

All U.S. Government Documents (Utah Regional Depository)

This Environmental Assessment (EA) documents results of an analysis of proposed changes to the current management of wildland fire and hazardous fuels for the Bureau of Land Management (BLM) Southern Utah Support Area (SUSA) planning area. Proposed revisions of the SUSA Fire Management Plan (FMP) serve as the Proposed Action for this EA. The revised FMP incorporates current planning requirements associated with fire management on public lands, including wildland fire suppression and fuel treatments. The EA analysis is designed to ensure compliance with National Environmental Policy Act (NEPA). It allows determinations to be made as to whether any “significant” impacts, …

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Overdrive® Ecological Risk Assessment: Final Report, Bureau Of Land Management, Ensr International Nov 2005

Overdrive® Ecological Risk Assessment: Final Report, Bureau Of Land Management, Ensr International

All U.S. Government Documents (Utah Regional Depository)

The Bureau of Land Management (BLM), United States Department of the Interior (USDI), is proposing a program to treat vegetation on up to six million acres of public lands annually in 17 western states in the continental United States (U.S.) and Alaska. As part of this program, the BLM is proposing the use of ten herbicide active ingredients (a.i.) to control invasive plants and noxious weeds on approximately one million of the 6 million acres proposed for treatment. The BLM and its contractor, ENSR, are preparing a Vegetation Treatments Programmatic Environmental Impact Statement (EIS) to evaluate this and other proposed …

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Tebuthiuron Ecological Risk Assessment, Bureau Of Land Management, Ensr International Nov 2005

Tebuthiuron Ecological Risk Assessment, Bureau Of Land Management, Ensr International

All U.S. Government Documents (Utah Regional Depository)

The Bureau of Land Management (BLM), United States Department of the Interior (USDI), is proposing a program to treat vegetation on up to six million acres of public lands annually in 17 western states in the continental United States (U.S.) and Alaska. As part of this program, the BLM is proposing the use of ten herbicide active ingredients (a.i.) to control invasive plants and noxious weeds on approximately one million of the 6 million acres proposed for treatment. The BLM and its contractor, ENSR, are preparing a Vegetation Treatments Programmatic Environmental Impact Statement (EIS) to evaluate this and other proposed …

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Diquat Ecological Risk Assessment, Final Report, Bureau Of Land Management Nov 2005

Diquat Ecological Risk Assessment, Final Report, Bureau Of Land Management

All U.S. Government Documents (Utah Regional Depository)

The United States Department of the Interior (USDI) Bureau of Land Management (BLM) is proposing a program to treat vegetation on up to six million acres of public lands annually in 17 western states in the continental United States (US) and Alaska. As part of this program, the BLM is proposing the use of ten herbicide active ingredients (a.i.) to control invasive plants and noxious weeds on approximately one million of the 6 million acres proposed for treatment. The BLM and its contractor, ENSR, are preparing a Vegetation Treatments Programmatic Environmental Impact Statement (EIS) to evaluate this and other proposed …

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Sulfometuron Methyl Ecological Risk Assessment, Final Report, Bureau Of Land Management, Ensr International Nov 2005

Sulfometuron Methyl Ecological Risk Assessment, Final Report, Bureau Of Land Management, Ensr International

All U.S. Government Documents (Utah Regional Depository)

The Bureau of Land Management (BLM), United States Department of the Interior (USDI), is proposing a program to treat vegetation on up to six million acres of public lands annually in 17 western states in the continental United States (U.S.) and Alaska. As part of this program, the BLM is proposing the use of ten herbicide active ingredients (a.i.) to control invasive plants and noxious weeds on approximately one million of the six million acres proposed for treatment. The BLM and its contractor, ENSR, are preparing a Vegetation Treatments Programmatic Environmental Impact Statement (EIS) to evaluate this and other proposed …

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Salt Lake Fire Management Plan Environmental Assessment, United States Department Of The Interior, Bureau Of Land Management Nov 2005

Salt Lake Fire Management Plan Environmental Assessment, United States Department Of The Interior, Bureau Of Land Management

All U.S. Government Documents (Utah Regional Depository)

This Environmental Assessment (EA) has been prepared to document the results of an analysis of proposed changes to the current management of wildland fire and hazardous fuels for the Bureau of Land Management (BLM) Salt Lake Field Office. Proposed revisions of the Salt Lake Fire Management Plan (FMP) serve as the Proposed Action Alternative for this EA. The revised FMP incorporates current planning requirements associated with fire management on public lands, including wildland fire suppression and fuel treatments. The EA analysis is designed to ensure compliance with the National Environmental Policy Act (NEPA). It allows determinations to be made as …

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Reno, Nevada Imazapic Ecological Risk Assessment: Final Report, Ensr International, Bureau Of Land Management Nov 2005

Reno, Nevada Imazapic Ecological Risk Assessment: Final Report, Ensr International, Bureau Of Land Management

All U.S. Government Documents (Utah Regional Depository)

The Bureau of Land Management (BLM), United States Department of the Interior (USDI), is proposing a program to treat vegetation on up to six million acres of public lands annually in 17 western states in the continental United States (U.S.) and Alaska. The primary objectives of the proposed program include fuels management, weed control, and fish and wildlife habitat restoration. Vegetation would be managed using five primary vegetation treatment methods: mechanical, manual, biological, chemical, and prescribed fire. The BLM and its contractor, ENSR, are preparing a Vegetation Treatments Programmatic Environmental Impact Statement (EIS) to evaluate the effects of the proposed …

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Chlorsulfuron, Ecological Risk Assessment, Final Report, Ensr International Nov 2005

Chlorsulfuron, Ecological Risk Assessment, Final Report, Ensr International

All U.S. Government Documents (Utah Regional Depository)

The Bureau of Land Management (BLM), United States Department of the Interior (USDI), proposing a program to treat vegetation on up to six million acres of public lands annually in 17 western states in the continental United States (US) and Alaska. As part of this program, the BLM is proposing the use of ten herbicide active ingredients (a.i.) to control invasive plants and noxious weeds on approximately one million of the 6 million acres proposed for treatment. The BLM and its contractor, ENSR, are preparing a Vegetation Treatments Programmatic Environmental Impact Statement (EIS) to evaluate this and other proposed vegetation …

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Vernal Fire Management Plan Environmental Assessment, United States Department Of The Interior, Bureau Of Land Management Nov 2005

Vernal Fire Management Plan Environmental Assessment, United States Department Of The Interior, Bureau Of Land Management

All U.S. Government Documents (Utah Regional Depository)

This Environmental Assessment (EA) documents results of an analysis of proposed changes to the current management of wildland fire and hazardous fuels for the Bureau of Land Management (BLM) Vernal Field Office. Proposed revisions of the Vernal Fire Management Plan (FMP) serve as the Proposed Action for this EA. The revised FMP incorporates current planning requirements associated with fire management on public lands, including wildland fire suppression and fuel treatments. The EA analysis is designed to ensure compliance with the National Environmental Policy Act (NEPA). It allows determinations to be made as to whether any significant impacts, as defined by …

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Utah Resource Assessment, Utah Association Of Conservation Districts, Utah Department Of Agriculture And Food, Natural Resource Conservation Service Oct 2005

Utah Resource Assessment, Utah Association Of Conservation Districts, Utah Department Of Agriculture And Food, Natural Resource Conservation Service

All U.S. Government Documents (Utah Regional Depository)

Located in the Rocky Mountain Region, Utah derives its name from the Native American Ute tribe and means “people of the mountains”. Utah is 84,900 square miles and is ranked the 11th largest state (in terms of square miles) in the US. As hosts of the 2002 Winter Olympic Games, Utah boasts the “greatest snow on earth” and is the home of 18 colorful National Parks and monuments. Utah's peaks are, on average, the tallest in the country and create great contrasts that range from the snow covered peaks of the Uinta Range in the east, to the renowned natural …

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Final Environmental Assessment: Proposed Demolition Of 12 Structures, Hill Air Force Base, Utah, Randal Klein, Kay Winn Aug 2005

Final Environmental Assessment: Proposed Demolition Of 12 Structures, Hill Air Force Base, Utah, Randal Klein, Kay Winn

All U.S. Government Documents (Utah Regional Depository)

Hill AFB proposes to accommodate current United States Air Force (USAF) missions by demolishing 12 structures on Hill AFB. All 12 buildings have both aged and deteriorated to the point they cannot be economically repaired or remodeled. Seven of the 12 buildings would be demolished without being replaced in kind. For five of the 12 buildings, military construction (MILCON) projects would provide new facilities to house the activities that are or were being performed in the deteriorated structures. The proposed action and the no action alternative were both considered in detail. Following the demolition phase, backfill and revegetation operations would …

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