20
© 2005, George Gross, UIUC
TRANSMISSION  BOTTLENECKS:  WESTERN  INTERCONNECTION
size of transmission paths
<   1 GW
1 GW £                    £   3 GW
>   3 GW
50% and greater
percentage of hours congested
40% to 49%
30% to 39%
20% to 29%
10% to 19%
Source: DoE National Transmission Grid Study, May 2002