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Full-Text Articles in Physical Sciences and Mathematics
Abandoned Mine Waste Repositories: Site Selction, Design, And Cost, K. L. Ford, M. Walker
Abandoned Mine Waste Repositories: Site Selction, Design, And Cost, K. L. Ford, M. Walker
United States Bureau of Land Management: Staff Publications
The Bureau of Land Management (BLM) is conducting priority cleanups of abandoned mine sites on public lands. Typically, these sites contain tailings piles, cyanide heaps, and rock dumps that historically were constructed in or near drainages and now are releasing pollutants into watersheds. In compliance with regulations, BLM selects the most environmentally suitable site for removing mining waste and placing it into repositories. Repositories have different design features, and the design selected should be based on site-specific conditions and the results of water balance models. A Geographic Information System (GIS) can be a useful tool for screening and selecting a …
Analyses Of Natural Gases, 1998–2001, B. D. Gage, D. L. Driskill
Analyses Of Natural Gases, 1998–2001, B. D. Gage, D. L. Driskill
United States Bureau of Land Management: Staff Publications
Technical Note 412 contains analyses and related source data for 311 natural gas samples from 13 States. Of the total samples, 309 were collected during calendar years 1998 through 2001. The analyses were made using mass spectroscopy and gas chromatography. None of the analyses have been published previously in other analyses reports. All samples were obtained and analyzed as part of the United States Department of the Interior’s Bureau of Land Management investigations of the occurrences of helium in natural gases of countries with free-market economies. The results of these investigations are published periodically to make the information available to …
Passive Treatment Systems For Acid Mine Drainage, K. L. Ford
Passive Treatment Systems For Acid Mine Drainage, K. L. Ford
United States Bureau of Land Management: Staff Publications
Passive Treatment Systems provide an alternative method for removing metals from acid mine drainage. There are several types of passive treatment systems; they may be used on their own or in combination to treat difficult effluents. The type of system selected is dependent upon the chemistry of the acid mine drainage and the flow of the discharge, as well as State and Federal regulations. Passive treatment systems do not require power and are less expensive than active treatment systems. They also require less maintenance, which makes them advantageous in remote locations.
Wildlife Water Catchment Construction In Nevada, William R. Brigham, Craig Stevenson
Wildlife Water Catchment Construction In Nevada, William R. Brigham, Craig Stevenson
United States Bureau of Land Management: Staff Publications
This technical note describes two artificial water catchment (guzzler) construction methods that are used in northern and southern Nevada. In northern Nevada, a standard guzzler unit is constructed, and a site is located in which to install it. In southern Nevada, the slickrock and artificial apron units are tailored to specific sites. Each of these methods includes detailed information on site selection, site preparation, selection and transport of materials and equipment, and step-by-step construction information. The technical note should give prospective builders enough information to construct a guzzler on their own. The note also includes information on construction methods and …
Aerial Surveys Of Cliff-Nesting Raptors, Robert J. Ritche, Ann M. Wildman, David A. Yokel
Aerial Surveys Of Cliff-Nesting Raptors, Robert J. Ritche, Ann M. Wildman, David A. Yokel
United States Bureau of Land Management: Staff Publications
In summer 1999, an extensive aerial survey of cliff-nesting raptors was conducted in the National Petroleum Reserve–Alaska (NPR–A) on Alaska’s North Slope. No similarly extensive survey had been conducted since 1977. In the interim, the regional population of the Arctic peregrine falcon (Falco peregrinus tundrius) had increased, as shown by monitoring along the Colville River. The 1999 survey assessed the present abundance and distribution of the peregrine falcon, as well as the gyrfalcon (Falco rusticolus), golden eagle (Aquila chrysaetos), and rough-legged hawk (Buteo lagopus) in most of the NPR–A. Specifically excluded from …