P-5

Ancillary Services Prices, Day Ahead Market

12/31/2007

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)
00:000.250.250.25450.250.250.2545
01:000.20.20.2450.20.20.245
02:000.20.20.2450.20.20.245
03:000.20.20.2450.20.20.245
04:000.20.20.2450.20.20.245
05:000.20.20.276.730.20.20.276.73
06:000.30.30.3650.30.30.365
07:009.593.090.57570.50.575
08:009.93.43.4859.93.43.485
09:009.593.093.0962.599.593.093.0962.59
10:009.573.073.0762.579.573.073.0762.57
11:009.553.053.0562.559.553.053.0562.55
12:009.573.073.0762.579.573.073.0762.57
13:009.573.073.0762.579.573.073.0762.57
14:009.543.041.3460.847.841.341.3460.84
15:009.543.040.56070.50.560
16:0011.753.543.5476.810.043.543.5476.8
17:0013.943.583.5881.9413.943.583.5881.94
18:0013.753.583.5881.7513.753.583.5881.75
19:0010.063.563.5678.0610.063.563.5678.06
20:0012.543.093.0977.599.593.093.0977.59
21:0073.030.56573.030.565
22:0070.50.55070.50.550
23:000.250.250.25450.250.250.2545