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1459897
NorthWestern Corporation
WAUW Base Case
2020 C001789
Study Parameter Winter(MW) Spring(MW) Summer(MW) Fall(MW) Study Parameter Reference
Seller and Affiliate Capacity (owned, controlled or under LT contract)
Seller Installed Capacity 5.00 6.00 6.00 5.00 Exhibit 3a Exhibit 3a Exhibit 3a Exhibit 3a
Seller Remote Capacity 26.00 33.00 33.00 26.00 Exhibit 3a Exhibit 3a Exhibit 3a Exhibit 3a
Seller LT Firm Purchases From Inside 0.00 0.00 0.00 0.00
Seller LT Firm Purchases From Outside 0.00 0.00 0.00 0.00
Seller LT Firm Sales 0.00 0.00 0.00 0.00
Seller Seasonal Planned Outages 0.00 0.00 0.00 0.00 Conservatively assumed to be zero Conservatively assumed to be zero Conservatively assumed to be zero Conservatively assumed to be zero
Seller Uncommited Capacity Imports 7.00 9.00 8.00 4.00 Wkp-Import Allocations Avg-a Wkp-Import Allocations Avg-a Wkp-Import Allocations Avg-a Wkp-Import Allocations Avg-a
Capacity Deductions
Study Area Average Peak Native Load 134.00 112.00 142.00 113.00 Wkp-Load Summary Wkp-Load Summary Wkp-Load Summary Wkp-Load Summary
Amount of Average Peak Native Load Attributable to Seller 36.00 33.00 44.00 33.00 Wkp-NWEN Load Wkp-NWEN Load Wkp-NWEN Load Wkp-NWEN Load
Amount of Average Peak Native Load Attributable to Non-Affiliates 98.00 79.00 98.00 80.00
Study Area Reserve Requirements 8.00 7.00 9.00 7.00 Wkp-Reserves Summary Wkp-Reserves Summary Wkp-Reserves Summary Wkp-Reserves Summary
Amount of Study Area Reserve Requirements Attributable to Seller 2.00 2.00 3.00 2.00 Set equal to 6% of Load Set equal to 6% of Load Set equal to 6% of Load Set equal to 6% of Load
Amount of Study Area Reserve Requirements Attributable to Non-Affiliates 6.00 5.00 6.00 5.00
Non-Affiliate Capacity (owned, controlled or under LT contract)
Non-Affiliate Installed Capacity 57.00 72.00 72.00 56.00 Wkp-Generation Summary, less Row A Wkp-Generation Summary, less Row A Wkp-Generation Summary, less Row A Wkp-Generation Summary, less Row A
Non-Affiliate Remote Capacity 0.00 0.00 0.00 0.00
Non-Affiliate LT Firm Purchases from Inside 0.00 0.00 0.00 0.00
Non-Affiliate LT Firm Purchases from Outside 0.00 0.00 0.00 0.00
Non-Affiliate LT Firm Sales 0.00 0.00 0.00 0.00
Non-Affiliate Seasonal Planned Outages 0.00 0.00 0.00 0.00 Wkp-Outages Wkp-Outages Wkp-Outages Wkp-Outages
Non-Affiliate Uncommitted Capacity Imports 110.00 73.00 122.00 77.00 Wkp-SILs Summary, less Row E Wkp-SILs Summary, less Row E Wkp-SILs Summary, less Row E Wkp-SILs Summary, less Row E
Supply Calculations
Total Competing Supply 63.00 61.00 90.00 48.00
Seller Uncommitted Capacity 0.00 13.00 0.00 0.00
Total Seasonal Uncommitted Capacity 63.00 74.00 90.00 48.00
Seller Market Share 0.00 17.57 0.00 0.00
Result (0 for Fail, 1 for Pass) 1 1 1 1
Total Imports 117.00 82.00 130.00 81.00
Seller Percent of SIL 5.98 10.98 6.15 4.94
Non-Affiliate Percent of SIL 94.02 89.02 93.85 95.06
SIL Value 117.00 82.00 130.00 81.00
SIL Limit Exceeded (0 for No, 1 for Yes) 0 0 0 0


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