P-5

Ancillary Service Prices, Day Ahead Market

09/30/2004

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)
00:000.250.250.25200.250.250.2520
01:000.190.190.19200.190.190.1920
02:000.150.150.15200.150.150.1520
03:000.150.150.15200.150.150.1520
04:000.150.150.15200.150.150.1520
05:000.250.250.25400.250.250.2540
06:000.250.250.25550.250.250.2555
07:000.180.180.18550.180.180.1855
08:000.170.170.17550.170.170.1755
09:000.990.170.17550.990.170.1755
10:000.160.160.16400.160.160.1640
11:000.170.170.17140.170.170.1714
12:000.170.170.17140.170.170.1714
13:000.170.170.17140.170.170.1714
14:000.170.170.17140.170.170.1714
15:000.170.170.17140.170.170.1714
16:000.990.990.99160.990.990.9916
17:000.250.250.25400.250.250.2540
18:000.20.20.2400.20.20.240
19:001.990.20.2401.990.20.240
20:000.250.250.25550.250.250.2555
21:000.990.170.17400.990.170.1740
22:000.250.250.25400.250.250.2540
23:001.990.250.25201.990.250.2520