Extent of Development
This seam has been extensively developed, but at the present time there are no collieries operating on this seam.
Harbour Seam, Victoria or Sydney Main Seam
This is the most extensively worked seam in the Sydney Coal Field. There are at the present time five collieries operating on this seam, Dominion Nos. 12, 18, 20, 26 and Princess Colliery of Old Sydney Collieries Limited.
The seam, which averages nearly 6 feet in thickness, is continuous through the Glace Bay, Lingan and Sydney Mines basins. It thins to less than 2 feet 6 inches north of Florence, near Sydney Mines.
No. 12 Colliery
The main deeps have been developed a distance of 2.8 miles seaward from the slope mouth. The area opened out is sufficient to maintain the present output for about five years.
No. 18 Colliery
This colliery is developed seaward by a main deep 5,700 feet long in the Phalen Seam and a horizontal cross-measure tunnel 2,300 feet long to the Harbour Seam. The present workings are 9,000 feet from the entrance of the tunnel into the seam. The area developed is sufficient to last three years at the present rate of output. The Harbour Seam will be fully depleted at that time.
No. 20 Colliery
This colliery is developed by two cross-measure tunnels from the Phalen Seam at a distance seaward of 7,600 feet from the shaft bottom.
The tunnels are one mile long and connect with a motor haulage level running parallel with the contour of the seam. This road is developed from the mouth of the tunnel a distance of 14,000 feet South and 6,200 feet North.
From the motor road two deeps are developed seaward a distance of 3,800 feet. The area developed is sufficient to maintain the present output for approximately four years.
No. 26 Colliery
No. 26 Colliery is developed from a motor haulage level in the Phalen Seam, by a cross-measure tunnel located 14,000 feet from the shaft bottom.
The tunnel is 2000 feet long and connects with a motor haulage level running parallel with the contour in the Harbour Seam. This level is developed 6900 feet south and 8600 feet north from the mouth of the tunnel where it enters the seam.
The area has been developed by three deeps seaward to a depth of 4400 feet from the Harbour Seam motor level. The developed area is sufficient to maintain the present output for a period of four years.
The main haulage deeps have been developed a distance of 19,150 feet seaward from the shaft bottom. The area now opened out is sufficient to maintain the present output for 7 years.
McBean Seam, Thorburn, Nova Scotia
The colliery is developed under the land area by a main deep 6,400 feet long from the mouth of the slope. Sufficient area has been opened to maintain the present output for about six years.
Return to Top of Page
Last Modified: 98-01-03
Authored by: Louis Frost
The information contained on this site is not provided for the purpose of factual
representation. Instead, it is provided in an historical context. Every effort has
been made to ensure that this information represents the actual content of the
original document authored by Louis Frost for the Dominion Coal Company
on or around 1962. Nevertheless, no warranties are provided in any respect.
~~ End of Page ~~