P-5

Ancillary Services Prices, Day Ahead Market

05/22/2008

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)
00:000.390.390.25450.250.250.2545
01:000.250.250.25450.250.250.2545
02:000.20.20.2450.20.20.245
03:000.20.20.2450.20.20.245
04:000.20.20.2450.20.20.245
05:000.250.250.25450.250.250.2545
06:000.390.390.2566.790.250.250.2566.79
07:0070.840.510070.840.5100
08:007.340.840.510070.50.5100
09:009.893.390.54570.50.545
10:009.893.393.3947.899.893.393.3947.89
11:009.893.393.3947.899.893.393.3947.89
12:009.883.383.3847.889.883.383.3847.88
13:009.893.390.54570.50.545
14:009.893.390.544.8970.50.544.89
15:009.893.390.54570.50.545
16:009.893.393.3947.899.893.393.3947.89
17:009.893.393.3947.899.893.393.3947.89
18:009.893.393.3947.899.893.393.3947.89
19:009.93.43.447.99.93.43.447.9
20:0010.063.563.5648.0610.063.563.5648.06
21:0010.524448.5210.524448.52
22:0070.50.54570.50.545
23:000.450.450.25450.250.250.2545