Record Details
page 114
Oregon Digital
| Field | Value |
|---|---|
| Title | page 114 |
| Relation | Power and the Pacific Northwest |
| Date | 2005-04-20 to 2005-05-09 |
| Rights | This item is in the public domain. Acknowledgement of the University of Oregon Libraries as a source is requested. |
| Type | page |
| Format | Scanned from originals using Silverfast AI 6.0 on UMAX Powerlook III flatbed scanner. Scanned images saved as 16 bit grayscale tiffs. 158.822 kb 8 bit - Gray Gamma 2.2 - greyscale Omnipage 14 used to OCR 8 bit tiffs and generate text files for full text access. 16 bit grayscale and 48>24 RGB color tiffs edited in Photoshop CS 8.0: cropped, rotated, reduced in size, levels adjusted, grayscale bit depth reduced to 8 and JPEGs created. |
| Description |
Prior to the advent of the helicopter, the "gin pole" technique was the principal method of tower erection. A long pole with a pulley at one end was lashed to the existing frame. Then, by horsepower or manpower, the next section of the tower was raised and secured. The pole was then moved up and the procedure repeated. Image captions: Tower construction near Bonneville Dam, 1939. Paying out conductor across the Columbia River from the Bonneville powerhouse. |
| Identifier | http://oregondigital.org/u?/wwdl,2038 |
