East of the lighthouse is just about right for the dumping grounds.
Good mapping software will show it as well.
I don't know how many fish were taken right off that area Sunday.
I was fishing NNE of the dumping grounds in 42 FOW.
Here's a link to charts. Go to page 15:

http://ocsdata.ncd.noaa.gov/BookletC...okletChart.pdf

On Sunday the "fleet" was scattered from the Dumping Grounds to several miles NNE.
By Sunday afternoon, I watched several head boats move west out of the pack, but they didn't leave the area.
No way to tell if they will still concentrated by Friday, but it shouldn't take long to find out.
These fish were easily spotted on sonar and the bite was steady, so it might still be a good place to start looking.
Check back on the forums or bait shops on Friday !
Good Luck !