P-5

Ancillary Service Prices, Day Ahead Market

12/31/2003

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)
00:000.370.370.37600.370.370.3760
01:000.380.380.38600.380.380.3860
02:000.250.250.25200.250.250.2520
03:000.250.250.25200.250.250.2520
04:000.250.250.25200.250.250.2520
05:000.380.380.38200.380.380.3820
06:001.21.21.2201.21.21.220
07:000.20.20.2750.20.20.275
08:001.990.320.32751.990.320.3275
09:0030.340.347530.340.3475
10:0030.240.241130.240.2411
11:0030.240.241130.240.2411
12:0030.240.241130.240.2411
13:0030.240.241130.240.2411
14:001.990.240.24111.990.240.2411
15:0030.240.241130.240.2411
16:003.250.20.2113.250.20.211
17:003.250.450.45113.250.450.4511
18:001.990.380.38111.990.380.3811
19:003.250.380.38113.250.380.3811
20:003.250.20.2113.250.20.211
21:003.250.380.38753.250.380.3875
22:000.240.240.24750.240.240.2475
23:000.840.840.84200.840.840.8420