Notices July 24, 2008

Posting Firm and Non-Firm Maximum Limits on OASIS

Effective immediately, firm and non-firm maximum limits for the following transmission segments will be posted on OASIS:

MH.230 to SPC	SPC to MH.230
WAUE to SPC	SPC to WAUE
AB.SK.MC to SPC	SPC to AB.SK.MC

Maximum limits will not be posted for flow throughs (e.g. MH.230 – AB.SK.MC; between two external interconnection points). In order to calculate the maximum limit for a flow through, use the lowest limit for the two segments (e.g. MH.230 – AB.SK.MC, use the lowest limit for either MH.230 – SPC or SPC – AB.SK.MC).

Updates for maximum limits will be posted to OASIS every two (2) hours on the even hour (e.g. 2 a.m. CST, 4 a.m. CST, etc.)

Maximum limits are calculated using the following formulas:

TTC = Total Transfer Capability

TRM = Transmission Reliability Margin

TRMCoef = Percentage of the reliability margin that is not released to the non-firm market

Firm maximum limit = TTC – TRM

Non firm maximum limit = TTC - (TRM * TRMCoef)

Maximum limits can be found on the SaskPower OASIS site under the “ATC” menu.

If you have any questions or comments, please contact us at:

Transmission_Services@saskpower.com