Page Ref: P-511A

Day Ahead Limiting Constraints

Time Stamp	Time Zone	Limiting Facility	Facility PTID	Contingency	Constraint Cost ($)
12/31/2007 05:00	EST	CENTRAL EAST - VC	23330	BASE CASE	2.29
12/31/2007 06:00	EST	CENTRAL EAST - VC	23330	BASE CASE	20.97
12/31/2007 07:00	EST	CENTRAL EAST - VC	23330	BASE CASE	11.65
12/31/2007 08:00	EST	CENTRAL EAST - VC	23330	BASE CASE	11.51
12/31/2007 00:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	8.9
12/31/2007 01:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	8.72
12/31/2007 02:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	13.6
12/31/2007 03:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	12.01
12/31/2007 04:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	12.28
12/31/2007 05:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	20.04
12/31/2007 06:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	22.07
12/31/2007 07:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	12.59
12/31/2007 08:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	8.84
12/31/2007 09:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	11.05
12/31/2007 10:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	8.67
12/31/2007 11:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	6.97
12/31/2007 12:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	12.93
12/31/2007 13:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	11.13
12/31/2007 14:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	15.39
12/31/2007 15:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	25.58
12/31/2007 16:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	20.46
12/31/2007 17:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	21.04
12/31/2007 18:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	21.31
12/31/2007 19:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	21.12
12/31/2007 20:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	22.61
12/31/2007 21:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	15.6
12/31/2007 22:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	29.94
12/31/2007 23:00	EST	DUNWODIE 345 SHORE_RD 345 1	25091	BASE CASE	25.91
12/31/2007 17:00	EST	DYSINGER EAST	23326	BASE CASE	6.14
12/31/2007 19:00	EST	DYSINGER EAST	23326	BASE CASE	7.23
12/31/2007 00:00	EST	RAINEY 138 VERNON 138 1	25297	BASE CASE	0.02
12/31/2007 01:00	EST	RAINEY 138 VERNON 138 1	25297	BASE CASE	0.02
12/31/2007 02:00	EST	RAINEY 138 VERNON 138 1	25297	BASE CASE	0.02
12/31/2007 03:00	EST	RAINEY 138 VERNON 138 1	25297	BASE CASE	0.02
12/31/2007 04:00	EST	RAINEY 138 VERNON 138 1	25297	BASE CASE	0.02
12/31/2007 00:00	EST	WEST CENTRAL	23312	BASE CASE	36.43
12/31/2007 01:00	EST	WEST CENTRAL	23312	BASE CASE	34.39
12/31/2007 02:00	EST	WEST CENTRAL	23312	BASE CASE	26.7
12/31/2007 03:00	EST	WEST CENTRAL	23312	BASE CASE	26.78
12/31/2007 04:00	EST	WEST CENTRAL	23312	BASE CASE	28.02
12/31/2007 05:00	EST	WEST CENTRAL	23312	BASE CASE	34.21
12/31/2007 06:00	EST	WEST CENTRAL	23312	BASE CASE	34.61
12/31/2007 07:00	EST	WEST CENTRAL	23312	BASE CASE	33.17
12/31/2007 08:00	EST	WEST CENTRAL	23312	BASE CASE	35.67
12/31/2007 09:00	EST	WEST CENTRAL	23312	BASE CASE	41.79
12/31/2007 10:00	EST	WEST CENTRAL	23312	BASE CASE	44.04
12/31/2007 11:00	EST	WEST CENTRAL	23312	BASE CASE	41.83
12/31/2007 12:00	EST	WEST CENTRAL	23312	BASE CASE	40.27
12/31/2007 13:00	EST	WEST CENTRAL	23312	BASE CASE	39.76
12/31/2007 14:00	EST	WEST CENTRAL	23312	BASE CASE	21.82
12/31/2007 15:00	EST	WEST CENTRAL	23312	BASE CASE	38.31
12/31/2007 16:00	EST	WEST CENTRAL	23312	BASE CASE	41.64
12/31/2007 17:00	EST	WEST CENTRAL	23312	BASE CASE	34.02
12/31/2007 18:00	EST	WEST CENTRAL	23312	BASE CASE	37.15
12/31/2007 19:00	EST	WEST CENTRAL	23312	BASE CASE	30.7
12/31/2007 20:00	EST	WEST CENTRAL	23312	BASE CASE	39.67
12/31/2007 21:00	EST	WEST CENTRAL	23312	BASE CASE	39.44
12/31/2007 22:00	EST	WEST CENTRAL	23312	BASE CASE	28.93
12/31/2007 23:00	EST	WEST CENTRAL	23312	BASE CASE	37.41
12/31/2007 17:00	EST	HQNY ACTIVE DNI	999	ACTIVE DNI	3.47
12/31/2007 19:00	EST	HQNY ACTIVE DNI	999	ACTIVE DNI	-0.31
12/31/2007 22:00	EST	NYCA ACTIVE DNI	990	ACTIVE DNI	1.12
12/31/2007 07:00	EST	OHAC ACTIVE DNI	993	ACTIVE DNI	-4.23
12/31/2007 23:00	EST	OHAC ACTIVE DNI	993	ACTIVE DNI	4.86
12/31/2007 17:00	EST	PJAC ACTIVE DNI	994	ACTIVE DNI	-5.48
12/31/2007 07:00	EST	MOTTHAVN 345 RAINEY 345 2	325431	MOTTHAVN-RAINEY___345_Q11	0.03
12/31/2007 08:00	EST	MOTTHAVN 345 RAINEY 345 2	325431	MOTTHAVN-RAINEY___345_Q11	0.03
12/31/2007 14:00	EST	MOTTHAVN 345 RAINEY 345 2	325431	MOTTHAVN-RAINEY___345_Q11	0.03
12/31/2007 14:00	EST	FRASER 345 OAKDALE 345 1	25235	TWR:UCC2-41, EF24-40	-37.8