P-5

Ancillary Service Prices, Day Ahead Market

12/28/2003

Time StampEastWest
10 Min Spinning Reserve ($/MWHr)10 Min Non-Synchronous Reserve ($/MWHr)30 Min Operating Reserve ($/MWHr)Regulation ($/MWHr)10 Min Spinning Reserve ($/MWHr)10 Min Non-Synchronous Reserve ($/MWHr)30 Min Operating Reserve ($/MWHr)Regulation ($/MWHr)
00:000.350.350.35200.350.350.3520
01:000.370.370.37200.370.370.3720
02:000.220.220.22200.220.220.2220
03:000.220.220.22200.220.220.2220
04:000.220.220.22200.220.220.2220
05:000.370.370.37200.370.370.3720
06:003.251.251.25203.251.251.2520
07:003.250.320.32113.250.320.3211
08:003.250.320.32113.250.320.3211
09:00550.320.3211550.320.3211
10:00550.320.3299550.320.3299
11:00550.320.3299550.320.3299
12:00550.270.2799550.270.2799
13:00550.270.2799550.270.2799
14:00550.270.2799550.270.2799
15:003.250.240.24993.250.240.2499
16:003.250.20.2113.250.20.211
17:003.2511113.251111
18:003.251.11.1113.251.11.111
19:003.250.750.75113.250.750.7511
20:003.250.380.38113.250.380.3811
21:00301.251.2599301.251.2599
22:00550.20.299550.20.299
23:00550.380.3860550.380.3860