In 2017, AltaGas Ltd. proposed construction a new propane export facility on a sub-leased area of Ridley Terminals Inc. (RTI) in Prince Rupert, British Columbia (BC). The terminal would have a 1.2 million tonnes per annum (MTPA) throughput capacity.
Targeted drilling in BC and Alberta was expected to increase propane supply substantially and result in a surplus for the region. AltaGas believed a propane export facility was required in Western Canada to alleviate the increased supply of propane.
Binnie was chosen as a subconsultant to Gygax Engineering Associates from 2017 to 2019. The work scope involved:
- detailed design and construction support services for terminal site access roads
- fire protection watermain distribution and monitor equipment (to NFPA standards)
- drainage collection ditching and sediment collection pond
- the relocation of approximately 1700m of watermain and the addition of approximately 600m new watermain due to the addition of new rail tracks to support the terminal, and future Prince Rupert Port Authority planned rail extensions,
The relocation of the watermain due to the additional Alta Gas track was complex due to its parallel location to the rail tracks. Standard railway requirements that have pressurized pipe installed within a casing pipe should be within the railway right of way.
When in parallel, this requirement makes changes in direction changes, line valves or valve clusters and/or branch connections. As a result, discontinuity of the casing pipe is required.
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