COMMERCIALLY SIGNIFICANT CONSTRAINTS

Market Date: 09-JUL-2008 08-JUL-2008 07-JUL-2008 06-JUL-2008 05-JUL-2008 04-JUL-2008 03-JUL-2008 02-JUL-2008 01-JUL-2008 Hour: 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 Interval: 0815 0830 0845 0900

Capability N08H08  N08S08  N08W08  S08N08  W08N08  OC0 9999  9999  9999  9999  9999  OC1 9999  9999  9999  9999  9999

CM Zone N08H08  N08S08  N08W08  S08N08  W08N08  Shift Factor MW Scheduled Impact Shift Factor MW Scheduled Impact Shift Factor MW Scheduled Impact Shift Factor MW Scheduled Impact Shift Factor MW Scheduled Impact HOUSTON2008  -33.02% 463  -22.47% 315  -1.44% 20  22.47% -315  1.44% -20  NORTH2008  -0.15% -2  -0.12% -2  -1.27% -20  0.12% 2  1.27% 20  SOUTH2008  -22.07% 39  -38.67% 68  -2.54% 4  38.67% -68  2.54% -4  WEST2008  -1.78% -1  -2.16% -1  -38.01% -14  2.16% 1  38.01% 14  Total Scheduled Impact 499 380 -10 -380 10 Shadow Price $0.0  $0.0  $0.0  $0.0  $0.0

CSC/CRE Data