P-5

Ancillary Services Prices, Day Ahead Market

05/31/2008

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
01:000.250.250.25450.250.250.2545
02:000.20.20.2450.20.20.245
03:000.250.250.25450.250.250.2545
04:000.20.20.2450.20.20.245
05:000.250.250.2552.050.250.250.2552.05
06:003.353.350.251000.250.250.25100
07:0073.490.510073.490.5100
08:0073.390.510073.390.5100
09:009.993.490.54570.50.545
10:009.893.390.54570.50.545
11:009.893.390.54570.50.545
12:009.893.390.54570.50.545
13:0073.340.54573.340.545
14:0073.340.54573.340.545
15:0010.273.450.184570.180.1845
16:009.883.380.54570.50.545
17:0010.794.290.54570.50.545
18:0010.393.890.54570.50.545
19:0010.393.890.54570.50.545
20:0010.393.890.54570.50.545
21:0014.984.390.54570.50.545
22:009.93.40.54570.50.545
23:003.893.890.25450.250.250.2545