English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Capps coal field, one of the Beluga coal fields located 60 miles west of Anchorage, Alaska, is in a remote roadless area above the treeline. Two major coal seams y the 20-foot thick Capps seam and 40-foot thick Waterfall seam, will be mined to supply an export market. No high-yield aquifers were identified during drilling of seven test wells and two continuously cored drill holes, but several Tertiary units of coal and weakly consolidated sandstone and conglomerate collectively provided as much as 60 gallons per minute to wells. Melting of the winter snowpack continues throughout the summer and precludes measurement of baseflow in Capps Creek until late winter, when stream discharge is less than 10 cubic feet per second. Sedge bogs and thin discontinuous glacial aquifers are probably the source of water for springs that sustain baseflow in the area to be mined. Heads in the deeper bedrock aquifers are commonly below land surface; these aquifers do not contribute to baseflow in the mine area. The concentration of dissolved solids in ground water appears to increase with depth, but dissolved solids did not exceed 161 milligrams per liter in any sample. Both ground water and surface water are potable but ground water may require aeration to remove an odor of hydrogen sulfide. INTRODUCTION Alaska, which has about half of the nation's coal reserves, has only one small (about 700,000 tons annually) active mine. However, the potential for development of new mines is great. One of the most likely places for such development within the next 10 years is the Beluga coal fields on the west side of Cook Inlet (fig. 1). In just one 50,000-acre part of this field, industry has identified 750 million tons of economically extractable low-sulfur coal within 30 mi of tidewater (Sanders, 1980). v The Capps Creek coal field (hereafter called the Capps field) is one of the Beluga coal fields. The field is about 24 mi from tidewater and about 60 mi from Anchorage (fig. 1). There are no roads into the field, but tractor trails provide access from the nearest road near Tyonek. The Capps field is situated in rolling uplands that range in altitude from 1500 ft to 2000 ft above sea level. The east side of the field is deeply incised by Capps Creek and North Capps Creek near where they flow into the glacially excavated Beluga River valley. Sedge bogs occupy about 10 percent of the coal field (Gough and Severson, 1983), and the field is entirely above the treeline.

Results of test drilling and hydrogeology of Capps Coal Field, Alaska