Affichage de 176 résultats

The photoprint illustrates the water treatment methods of the Bonnybrook Sewage Treatment Plant; A note was attached to the photoprint with tape, this was removed and stored with the photoprint; The note reads: 'Differences in clarity and sediment are readily visible in samples taken from the Bonnybrook plant. Left is raw sewage, as it enters the plant. Centre is effluent from the primary treatment process, considerably clearer but still cloudy. Effluent from new secondary process, right, is almost perfectly clear. -30-; Bob Anderson; Francis, Williams, Johnson &Payne Ltd. 700 - 6th Avenue S.W. #644, Calgary 1, Alberta. March 26, 1971 Phone 266-7061'

Item consists of a photoprint of the Bonnybrook Sewage Treatment Plant. The plant is located at 4302 15th Street SE; A note was attached to the photoprint with tape, this was removed and stored with the photoprint; The note reads: 'North America's largest mechanical aeration facility, using 40 units such as the one above, is an integral part of the secondary process at Bonnybrook. The aeration section is the size of five football fields. Underwood and McLellan engineer John Sabol stands beside one of the 60-horsepower electric drive units. -30-; Bob Anderson; Francis, Williams, Johnson &Payne Ltd. 700 - 6th Avenue S.W. #644, Calgary 1, Alberta. March 26, 1971 Phone 266-7061'

Photoprint illustrates a current or potential snow dumping site; Photo was taken for the Alberta Fish and Wildlife Division. Item consists of a photoprint of the Elbow River frozen over, the 2nd Street SE bridge is also visible

Photoprint shows snow and a square item; Photo was taken for the Alberta Fish and Wildlife Division

Photo was taken for the Alberta Fish and Wildlife Division

Photoprint illustrates a current or potential snow dumping site; Sediment deposits are visible; Photo was taken for the Alberta Fish and Wildlife Division. Item consists of a photoprint of the Elbow River and the Canadian National Railway bridge.

Photoprint illustrates a current or potential snow dumping site; Photo was taken for the Alberta Fish and Wildlife Division. Item consists of a photoprint of the Elbow River and the 2nd Street SE bridge.

Photoprint illustrates a current or potential snow dumping site; Sediment deposits are visible; Photo was taken for the Alberta Fish and Wildlife Division. Item consists of a photoprint of the Elbow River and the 2nd Street SE bridge.

Photoprint illustrates a current or potential snow dumping site; Sediment deposits are visible; Photo was taken for the Alberta Fish and Wildlife Division. Item consists of a photoprint of the Elbow River river and reflected trees.

Photoprint illustrates a current or potential snow dumping site; Sediment deposits are visible; Photo was taken for the Alberta Fish and Wildlife Division. Item consists of a photoprint of snow on the Elbow River's banks.