Carriage contracts are not local...Comcast, nationwide, has the signed carriage agreement with ESPN.
Now, since the ACC is not in Washington State...they do not automatically carry the ACCN. They do have access through the Digital Preferred Comcast package.
But all in-footprint state Comcast subscribers will automatically have and pay in-footprint fees for, the ACCN.
Houston, Atlanta, Amarillo, San Antonio, Rising Star, Sacramento, Truckee, etc...they will have the channel.
And that was why the ACC picked up SMU...Texas is now in-footprint...And Cal-Stan...California now in footprint.