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Lake McConaughy

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Journal Article
Published: 01 April 1990
Rocky Mountain Geology (1990) 28 (1): 1–29.
Journal Article
Published: 01 January 2004
Environmental and Engineering Geoscience (2004) 10 (1): 69–90.
...R. M. JOECKEL; R. F. DIFFENDAL, JR. Abstract Lake C. W. McConaughy, a 63-year-old manmade reservoir in the North Platte Valley of western Nebraska, is the largest standing body of water in the state. From the time that Kingsley Dam was completed in 1941 until the present day (2004), many geomorphic...
FIGURES | View All (21)
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Figure 1. <b>Lake</b> <b>McConaughy</b> area, Keith and Garden counties, NE (see inset fo...
Published: 01 January 2004
Figure 1. Lake McConaughy area, Keith and Garden counties, NE (see inset for state map). The lake fills the valley of the North Platte River between loess table lands to the south and the Sand Hills to the north. Delta has been built at western end of lake by sedimentation from river; southeastern
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Table 1. <b>Lake</b> <b>McConaughy</b> statistics
Published: 01 January 2004
Table 1. Lake McConaughy statistics
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Table 2. Chronology of events for <b>Lake</b> <b>McConaughy</b>
Published: 01 January 2004
Table 2. Chronology of events for Lake McConaughy
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Figure 9. Map of first segment of southeastern shore of <b>Lake</b> <b>McConaughy</b> (se...
Published: 01 January 2004
Figure 9. Map of first segment of southeastern shore of Lake McConaughy (see Figure 1 for location). In Figures 9–12 , NS refers to new slope breaks that have formed since Kingsley Dam was completed in 1941
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Figure 12. Map of fourth segment of southeastern shore of <b>Lake</b> <b>McConaughy</b> (...
Published: 01 January 2004
Figure 12. Map of fourth segment of southeastern shore of Lake McConaughy (see Figure 1 for location). Points useful as landmarks, numbered westward from Kingsley Dam, are identified by Roman numerals. Circled Arabic numerals refer to particular scenarios of shoreline feature development. See
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Figure 10. Map of second segment of southeastern shore of <b>Lake</b> <b>McConaughy</b> (...
Published: 01 January 2004
Figure 10. Map of second segment of southeastern shore of Lake McConaughy (see Figure 1 for location). Inactive dune field on floor of North Platte Valley probably dates to Holocene and was vegetated in 1938/1939. Points useful as landmarks, numbered westward from Kingsley Dam, are identified
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Figure 16. Disjunct hydrogeologic changes associated with <b>Lake</b> <b>McConaughy</b>. ...
Published: 01 January 2004
Figure 16. Disjunct hydrogeologic changes associated with Lake McConaughy. A) Historical rise in the water table of the irrigation system of which Lake McConaughy is the key element ( Conservation and Survey Division, 2002 ); point labeled “E” is a well for which hydrograph is shown in Figure 14E
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Figure 8. Dunes along the southeastern shore of <b>Lake</b> <b>McConaughy</b>. A) Linear ...
Published: 01 January 2004
Figure 8. Dunes along the southeastern shore of Lake McConaughy. A) Linear dune approximately 3 m high forming along the cliff containing contact between the Brule Formation (below) and Ash Hollow Formation (above) in S½ NE¼ SW¼, section 2, T.14N., R.39W. (September 2001). B) Wind-rippled, coppice
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Figure 11. Map of third segment of southeastern shore of <b>Lake</b> <b>McConaughy</b> (s...
Published: 01 January 2004
Figure 11. Map of third segment of southeastern shore of Lake McConaughy (see Figure 1 for location). Points useful as landmarks, numbered westward from Kingsley Dam, are identified by Roman numerals. Circled Arabic numerals refer to particular scenarios of shoreline feature development
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Figure 15. Water table elevations in the vicinity of <b>Lake</b> <b>McConaughy</b> in 194...
Published: 01 January 2004
Figure 15. Water table elevations in the vicinity of Lake McConaughy in 1940 and 1979 (Source: Wenzel et al., 1941 , and Conservation and Survey Division files)
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Figure 19. North Platte River delta at <b>Lake</b> <b>McConaughy</b> in 1993 (A), 1999 (B...
Published: 01 January 2004
Figure 19. North Platte River delta at Lake McConaughy in 1993 (A), 1999 (B), and 1960 (C). Note the dramatic differences in the appearance of delta 1993 and 1999 due to management procedures: lake level was lower at the time of the 1993 photo, although 1993 had high annual rainfall, but lake level
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Figure 5. Erosional bedrock platforms on southeastern shore of <b>Lake</b> McConau...
Published: 01 January 2004
Figure 5. Erosional bedrock platforms on southeastern shore of Lake McConaughy. A) A well-developed platform 113 m in length, and an associated retreating cliff about 10 m high, on the east side of Ogallala Beach (see Figure 10 ); paving of large blocks (foreground) covers the next platform
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Figure 4. Pronounced grain of cementation (rod-like masses) in Ash Hollow F...
Published: 01 January 2004
Figure 4. Pronounced grain of cementation (rod-like masses) in Ash Hollow Formation along shore of Lake McConaughy. Preferred orientation of cementation is shown in Figure 3B . Field of view in foreground is about 3 m wide
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Figure 14. A–D) Hydrographs of selected monitored wells showing rising wate...
Published: 01 January 2004
Figure 14. A–D) Hydrographs of selected monitored wells showing rising water tables around Lake McConaughy during attainment of maximum pool level (1941–1951) and thereafter (see Figure 1 for locations). E) Well in irrigated area of Kearney County showing rise in water table in vicinity of canal
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Figure 3. Rose diagrams showing orientations of features measured in the fi...
Published: 01 January 2004
masses) in Ash Hollow Formation exposures around shore of Lake McConaughy. C) Orientation of spur ridges from upland slopes along the southeastern shore of the lake, which terminate as lakeshore headlands and are eroding landward. Note similarity between orientations in (A) and (B)
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Figure 20. Changes in channel configurations immediately upstream of the No...
Published: 01 January 2004
Figure 20. Changes in channel configurations immediately upstream of the North Platte River delta at Lake McConaughy, with an overlay of land section grid; flow is from left (west) to right into the lake. Aerial imagery coverage in 1938 (A) and 1952 (B) is incomplete, but partially overlaps 1999
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Figure 21. Interaction of waves produced by northwesterly winds with the he...
Published: 01 January 2004
Figure 21. Interaction of waves produced by northwesterly winds with the headlands on the southeastern shore of Lake McConaughy. Arrows indicate sites of slight refraction of wave fronts around projecting parts of the headlands on the northwest-facing flanks. Fine lines within headlands represent
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Figure 17. Surface salt accumulation, in essence anthropogenic salt flats, ...
Published: 01 January 2004
Figure 17. Surface salt accumulation, in essence anthropogenic salt flats, on exposed floor of Lake McConaughy (September 2001). A) Patchy efflorescences of thenardite (Na 2 SO 4 ) and patches of flat sedge ( Cyperus erythrorhizos ), looking northward. B) Close-up of ground surface in the same area