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Uploaded on:
14/02/2009 00:11:01
Digital Asset
File Size:
230.23 KB
1000 x 659 pixels
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P number: P001421
Old photograph number: Z00002
Caption: Near Toberonochy, Isle of Luing, Strathclyde Region. Percussion drilling rig close-up on the Isle of Luing during drilling for groundwater.
Description: The rig is a simple design that has stood the test of time. It is ideal for drilling boreholes into unconsolidated formations such as the Rasied Beach sands and gravels on Luing. A winch pulls up a 'bailer' or steel tube (in this case, 150 mm. diameter) on a cable before letting it drop through the steel casing. The bailer has a flap valve on the end which allows wet material into it. Theh flap closes when the bailer is pulled up to the surface and the contents poured out. The casing is then hammered into the ground to make progress with depth.
Date taken: 01/01/1997
Photographer: Ball, D.F.
Copyright statement: NERC
X longitude/easting: 173700
Y latitude/northing: 708900
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Landscape
Size: 230.23 KB; 1000 x 659 pixels; 85 x 56 mm (print at 300 DPI); 265 x 174 mm (screen at 96 DPI);
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