Project Description
The Alaska Pipeline Project proposes to design, permit and construct a new natural gas pipeline system beginning near Alaska's Prudhoe Bay field and extending over one of two alternative routes.
One route, the Alberta option, would extend from Prudhoe Bay to points near Fairbanks, and Delta Junction, and then to the Alaska-Canada border, where the pipeline would connect with a new pipeline in Canada. The pipeline in Canada would extend from the Alaska-Canada border to link up with pipeline systems near Boundary Lake, Alberta, Canada, providing the capability of transporting natural gas into the United States.
An alternative pipeline route, the Valdez LNG option, would extend from Prudhoe Bay through points near Fairbanks and Delta Junction, and then to LNG facilities (to be built by third parties) near Valdez, Alaska.
In both options, a minimum of five in-state connections to the main pipeline in Alaska, called off-takes, would provide local natural gas suppliers the opportunity to obtain natural gas to meet community needs. For the Alberta option, local off-takes will also be available along the pipeline route in Canada.
The Alaska Pipeline Project proposes to design, permit and construct a new gas treatment plant (GTP) as an integral component of the project's facilities. It would be located near existing Prudhoe Bay facilities and operate in conjunction with either the Alberta or the Valdez options.
A natural gas transmission pipeline connecting the Point Thomson field to the GTP is also a proposed component of both options.
Pipeline - Alberta Case (Prudhoe Bay to Alberta)
| Total length | 1717 miles (2762 km) |
| Pipeline length (Alaska) | 745 miles (1198 km) |
| Pipeline length (Canada) | 972 miles (1564 km) |
| Pipeline diameter | 48 inches |
| Maximum operating pressure | 2500 psig |
| Pipeline capacity (base design case) | 4.5 bcf/d |
| Pipeline capacity (with max compression) | 5.9 bcf/d |
Pipeline - Valdez LNG Case (Prudhoe Bay to Valdez)
| Pipeline length | 811 miles (1305 km) |
| Pipeline diameter | 48 inches |
| Maximum operating pressure | 2500 psig |
| Pipeline capacity (base design case) | 3.0 bcf/d |
Compression
Alberta Case 4.5 bcf/d |
Alberta Case 5.9 bcf/d |
Valdez LNG Case 3.0 bcf/d |
|
| Total compressor stations (Alaska) | 8 |
17 |
2 |
| Total compressor stations (Canada) | 11 |
20 |
n/a |
| In areas of continuous permafrost or where permafrost is predominant, gas will be chilled on the discharge side of compressor stations | |||
| Each compressor station site will be approximately 25 acres | |||
Gas Treatment Plant
| Initial design to process up to 5.3 bcf/d raw gas |
| Delivers 4.5 bcf/d of pipeline quality gas to pipeline at 2500 psig |
| Handles up to 0.6 bcf/d of CO2at 4000 psig |
| 4 trains (Alberta Case) / 3 trains (Valdez LNG Case) |
Point Thomson Transmission Pipeline
| Pipeline length | 58 miles (94 km) |
| Pipeline diameter | 32 inches |
| Maximum operating pressure | 1130 psig |
| Pipeline capacity | 1.1 bcf/d |