New maps of Federal coal

Wayland, Russell Gibson

doi:10.1130/0016-7606(1981)92<542:nmofc>2.0.co;2

Cited by 3 publications

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“…When funding, but not personnel, is dedicated to works like these, the use of a wide variety of experts becomes the main alternative. This distributed nature of work can result in product quality issues caused by inexperience, arbitrary protocols or lack of adherence to established protocols, and time constraints [20]. At many scales and for several purposes, updating standard forest range maps is essential.…”

Section: Introductionmentioning

confidence: 99%

Stakeholder Perceptions on the Need for Updated Tree Species Distribution Maps

Bettinger

Merry

Garzon³

et al. 2021

Forests

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Tree species distributions presented as range maps are powerful tools for forest-based decision-making processes. In the United States, Silvics of North America is a well-known reference for over 200 tree species. However, the current range maps are likely outdated due to changes in land use, advancements in technology, shifts in plant hardiness zones due to climate change, and shifting societal values that influence the development of these resources. Therefore, a survey was distributed to two stakeholder groups, registered foresters in four states and members of several professional organizations, to gain insight into whether Silvics of North America range maps should be updated. Although the survey delivery method varied between the two survey sampling frames, the opinions on updating species range maps between the two stakeholder groups were similar. Both groups indicated that updating the current range maps would be valuable and would best be informed by remote sensing, national field inventories, and expert insight, and by adding color and perhaps importance classes.

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Section: Introductionmentioning

confidence: 99%

Stakeholder Perceptions on the Need for Updated Tree Species Distribution Maps

Bettinger

Merry

Garzon³

et al. 2021

Forests

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Summary of results of the coal resource occurrence and coal development potential mapping program in part of the Powder River basin, Montana and Wyoming

Trent¹

1985

Open-File Report

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(CDP). These areas are characterized as having overburden-to-coal ratios of 1-10, 10-15, and 15 plus, respectively. The CDP area outlines follow legal subdivisions on quadrangle maps; the smallest size area shown is 40 acres. The best of the nonleased Federal coal resources in the Powder River Basin is about 100 billion short tons of surface minable (less than 500 ft of overburden) HIGH development potential coal of which about 62 billion short tons are in Wyoming. The total of nonleased Federal coal resources between 500 and 3,000 ft of overburden in the 243 quadrangles is roughly 576 billion short tons 67 billion in Montana and 509 billion in Wyoming; these resources have a LOW CDP for mining. However, roughly 75 billion of the 509 billion short tons of unleased Federal coal resources in areas 6, 7, and 8 of Wyoming have a HIGH development potential for in situ gasification. The current (1984) status of the energy market ($1.12 per gallon for gasoline), however, dims the development prospects for in situ gasification projects in the Powder River Basin. One of the primary benefits of this study is that the coal resources with HIGH and MODERATE development potential for surface mining and for in situ gasification are located by 7 1/2-minute quadrangles on regional small-scale index maps of the Powder River Basin. In the basin, 198 quadrangles contain more than 1 million short tons each of unleased strippable Federal coal of HIGH and MODERATE development potential. On the average, 31 percent of the area covered by the quadrangles has a HIGH development potential for surface mining. Of the 243 quadrangles tallied, 32 percent of the area, on the average, was eliminated from the estimate because it included nonFederal coal land, leased coal, or contained no coal beds more than 5 feet thick. A more thorough basinwide coal-resource assessment can be made after ail 70 to 80 excluded quadrangles are evaluated, especially the 44 quadrangles in the Sheridan-Buffalo area that have great amounts of coal. The principal contribution of this study is that the classified coal-resource data published in 243 separate reports are tabulated and presented in this summary report. Clearly, this will afford government, industry, or other interested parties the opportunity to examine and evaluate a great deal of coal-resources data for the Powder River Basin more easily and quickly.

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Energy and mineral resource assessment of the Ashland Division of the Custer National Forest, Powder River and Rosebud Counties, southeastern Montana

Gosen¹

1996

Open-File Report

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The U.S. Geological Survey conducted an assessment of the mineral and energy resources of the Ashland Division of the Custer National Forest. The Ashland Division comprises approximately 780 square miles (2,030 square kilometers) between the towns of Ashland and Broadus in southeastern Montana. All rocks exposed in this area are part of the Tongue River Member of the Paleocene Fort Union Formation, consisting mainly of shale, siltstone, sandstone, thick coal, clinker, and thin lenses of limestone. The study area lies in the north-central part of the Powder River Basin. The resource wealth of the Ashland Division lands abides in enormous reserves of lignite and subbituminous coal with low sulfur and low to moderate ash content. One estimate suggests that about 42 billion short tons of non-leased federal coal occur within 3,000 ft of the surface in the Ashland Division. The entire extent of the Ashland Division is underlain by coals of the Tongue River Member; about 20 coal beds have been correlated through the area to a depth of 2,000 ft. Single coal beds are as much as 65 ft thick. The thickest coal beds of the study area include the Anderson, Dietz (or the merged Anderson-Dietz), and Knobloch beds. At least one-third of the study area contains strippable coal deposits, defined as one or more coal bed(s) of 5 ft or greater in thickness overlain by less than 200 ft of overburden. The Ashland Division contains 16 strippable coal deposits, which include several areas where thick coal seams are covered by less than 100 ft of overburden. The largest tonnages of strippable coal occur in the Ashland coal deposit, where the Knobloch coal bed is 40-58 ft thick and the Sawyer bed is 7-16 ft thick. Thick widespread outcrops of clinker represent another abundant resource of the Ashland Division area. Clinker is a baked, fused or melted rock, usually reddish or lavender, formed by the natural burning of an underlying coal bed. Clinker in the Powder River Basin region is often mined, crushed and used locally for surfacing improved unpaved roads and as an aggregate material in paved roads. Clinker is abundant, accessible, and easy to excavate. The proximity to roads where it is needed is the primary factor in its usage. The Ashland Division area has no record of oil or gas production despite a moderate amount of oil and gas exploration. Five prospective petroleum plays have been identified beneath the Ashland Division; they involve Lower and Upper Cretaceous strata that host producing horizons elsewhere in the Powder River Basin. These plays remain hypothetical for the Ashland Division area, which appears to lack the prominent anticlines and domes typically favorable for oil and gas accumulation. The potential exists for undiscovered coal-bed methane, although this resource has yet to be proven or developed within the National Forest. Areas with Fort Union Formation coal beds deeper than 500 ft should have potential for coal-bed methane. Many areas of the Ashland Division meet this criteria. No potential for metallic mineral de...

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New maps of Federal coal

Cited by 3 publications

References 0 publications

Stakeholder Perceptions on the Need for Updated Tree Species Distribution Maps

Stakeholder Perceptions on the Need for Updated Tree Species Distribution Maps

Summary of results of the coal resource occurrence and coal development potential mapping program in part of the Powder River basin, Montana and Wyoming

Energy and mineral resource assessment of the Ashland Division of the Custer National Forest, Powder River and Rosebud Counties, southeastern Montana

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