OASIS is an Internet-based tool for sharing information on transmission prices and product availability. FERC Order No. 889 restricts communication between power marketing and transmission operation employees within any one organization. Utilities can obtain information about their own transmission system for their own wholesale power transactions only through OASIS.
The following OASIS sites serve Western’s control areas:
OATI WebOASIS
WAUE and WAUW (Upper Great Plains Region, East and West Control Areas) OASIS
Westtrans.net
WACM OASIS
WALC OASIS
Sierra Nevada Region transmission
The Sierra Nevada Region, based in Folsom, Calif., operates and maintains the Central Valley and Washoe projects' transmission lines and facilities, which were constructed to market and deliver power resources to wholesale customers in northern and central California and Nevada. The region imports additional power over Western's share of the Pacific Northwest-Pacific Southwest Intertie and the California-Oregon Transmission Project. The region operates a sub-control area called the Western Area Sierra Nevada (WASN), which also has ownership rights to capacity in the Pacific AC Intertie and the Los Banos-Gates Transmission Upgrade Project (Path 15). WASN is located in the Sacramento Municipal Utility District's control area.
To reserve transmission, visit WASN's Open Access Same-time Information System. (Note that this site requires a digital certificate and login.)
Upper Great Plains transmission
Western Area Power Administration's Upper Great Plains Region based in Billings, Montana, manages transmission facilities in Montana, North Dakota, South Dakota, Nebraska, Minnesota, and Iowa. These transmission facilities were constructed to market and deliver power from the Pick-Sloan Missouri Basin Program -- Eastern Division.
UGP manages two control areas from Watertown, S.D.; one in the Midwest Reliability Organization (MRO) region called Western Area Power Administration -- Upper Great Plains East (WAUE) and one in the Western Electricity Coordinating Council region called Western Area Power Administration -- Upper Great Plains West (WAUW). UGP transmission facilities are integrated with those of Basin Electric Power Cooperative and Heartland Consumers Power District to provide transmission services over an Integrated System (the “IS”).
Visit UGP's OASIS site. (Note that this site requires a digital certificate and login for full access.)
Desert Southwest Region transmission
Western's Desert Southwest Region , based in Phoenix, Ariz., operates and maintains Western transmission lines and facilities in Arizona, California, and Nevada, constructed to market and deliver power to customers from the Boulder Canyon and Parker-Davis projects and the transmission resources from the southern portion of the Pacific NW-SW Intertie. The region also manages the southern transmission facilities of the Salt Lake City Area Integrated Projects, which provides power to customers in Arizona, Colorado, New Mexico, Utah and Wyoming.
The region operates a control area from the regional office in Phoenix called Western Area Lower Colorado. DSW's available transmission capacity is posted on the OASIS site under WALC-DSW.
Rocky Mountain Region transmission
Western's Rocky Mountain Region, based in Loveland, Colo., operates and maintains Western's transmission facilities in Colorado, Wyoming, and Nebraska, which were constructed to market and deliver power from the Loveland Area Projects. The region also markets the northern portion of the Salt Lake City Area/Integrated Projects transmission system in Colorado , Wyoming and Utah. The region manages a Control Area in Loveland, Colo., known as the Western Area Colorado Missouri. RM markets available transmission capacity on the WACM OASIS site.
Western markets Loveland Area Project Transmission under the acronym LAPT and SLCA/IP transmission under the acronym CRCM. The WACM control area also manages transmission marketing for Basin Electric Power Cooperative, Inc., under the acronym BEPW and Black Hills Power, Inc., under the acronym BHBE.
Colorado River Storage Project Management Center transmission
The Colorado River Storage Project Management Center, based in Salt Lake City, Utah, manages the Salt Lake City Area Integrated Projects, which provides power to customers in Arizona, Colorado, New Mexico, Utah and Wyoming. The Desert Southwest and Rocky Mountain regions operate and maintain the SLCA/IP transmission facilities and provide engineering and other assistance to the CRSP MC.
To reserve transmission on the SLCA/IP transmission system south and west of Shiprock Substation in northwestern New Mexico (for service to Arizona ), visit the Western Area Lower Colorado area of the wesTTrans.net OASIS site. For SLCA/IP transmission north and east of Shiprock Substation in northwestern New Mexico (for service to Colorado, New Mexico, Utah, and Wyoming), visit the Western Area Colorado Missouri wesTTrans.net.
OATT revision
Western Area Power Administration revised its Open Access Transmission Service Tariff on Jan. 25, 2005. Western's original tariff (pdf 316 kb) was published in the Federal Register on January 6, 1998 and approved by the Federal Energy Regulatory Commission on April 12, 2002.
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