the time we built out as a power operation much like it is today where we've got 3 hundred and 80 meg watsz utilizing city owned this is a picture you're familiar with on our wall at 525 and our other brochures in a appealing way and for emphasis to draw out a couple of elements on the power side i talked about the hetch hetchy supplies on the extreme right the 3 hundred and 80 megawatts we didn't talk about the transition but you'll see the oakdale and turlock and the substation serving modus operandi even though and the one owned by penguin and those transition lines it get our power down into the bay area and from that point on pg&e owned transition lines to our customers here in san francisco the one hundred and 53 megawatts our transition where we interconnection in the middle the slide and to the extreme left any questions so far another pause moment to make sure i haven't lost you that's the operation of the system we say external highlights going from then to now things have changed let's talk about some of the changes and where the effect is on us thanks there's 3 major challenges