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Jackson Prairie Storage Facelift Gets Green Light from FERC

Jackson Prairie Storage Facelift Gets Green Light from FERC

FERC last week gave conditional approval to a major expansion and upgrade of Jackson Prairie Storage that would add 3.2 Bcf of working gas capacity and would boost the firm deliverability rate of the Pacific Northwest storage facility by 300 MMcf/d, both of which would heighten its peak-shaving capabilities.

The $30 million project, which is expected to be completed in the fall of 1999, would increase the working gas capacity of the Jackson Prairie facility, located south of Seattle, to 18.3 Bcf from 15.1 Bcf; firm withdrawal deliverability to 850 MMcf/d from 550 MMcf/d; total storage capacity to 39.4 Bcf from 34.3 Bcf; and more than double the best-efforts withdrawal rate to 150 MMcf/d from 71.8 MMcf/d. Cushion gas capacity, however, would drop slightly to 19 Bcf from 19.2 Bcf.

The Commission said project need was demonstrated, as it would directly benefit Jackson Prairie's three owners - Puget Sound Energy, Northwest Pipeline and Washington Water Power - and their customers. "This additional storage, as well as the service changes, will enhance Northwest's ability to cope with system balancing as well as aid Puget Sound's and Water Power's growing demands for service in their market areas," the order said [CP98-285].

Northwest Pipeline is the sole pipeline connected to Jackson Prairie, delivering gas from Canada and the southwestern United States for injection into the facility. Puget Sound, as operator, withdraws and delivers the gas to Northwest for transportation to Puget Sound, Washington Water and other LDCs.

The order, among other things, gives the go-ahead for Puget Sound to construct up to eight additional withdrawal wells and associated pipeline facilities in Jackson Prairie's Zone 2 reservoir, and install a new 6,960 hp compressor. Puget Sound also will make a number of changes with respect to the working and cushion gas levels of its two active storage zones - Zone 2 and Zone 9.

Susan Parker

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