| P number: | P001425 |
|---|---|
| Old photograph number: | Z00006 |
| Caption: | Hardthorn Road site, Dumfries, Dumfries and Galloway Region. A close-up of the drilling rig used to construct three production boreholes at Hardthorn Road, Dumfries. |
| Description: | The levelling rams on the drill rig are clearly seen. These take the weight of the rig during drilling and help to stabilize the equipment so that a vertical borehole can be produced. The power unit under the bonnet also turns the drill bit. Flushing of material from the borehole is provided by a large air compressor which also powers a down-the-hole 300 mm. diameter hammer. The photo was taken during an air-lift test after the borehole was drilled. Compressed air is blown into the borehole which then blows out a mixture of water and air. The orange box on the right collects the discharge water and a V-notch is used to measure water flow. |
| Date taken: | 01/01/1998 |
| Photographer: | Ball, D.F. |
| Copyright statement: | NERC |
| X longitude/easting: | 293650 |
| Y latitude/northing: | 578120 |
| Coordinate reference system, ESPG code: | 27700 (OSGB 1936 / British National Grid) |
| Orientation: | Landscape |
| Size: | 228.72 KB; 1000 x 647 pixels; 85 x 55 mm (print at 300 DPI); 265 x 171 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
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