Today is ES rollover day, thus there are two worksheets posted; one for the June 2015 contract and one for the September 2015 contract.  Most volume should remain on the June contract at least through tomorrow morning.  In addition to two worksheets, there are also two sets of EDI files.  You can obtain the new Sep 2015 contract EDI URLs through the DTG website: Member Resources -> DTG Levels for MarketDelta.

ES June 2015 contract

ES Sep 2015 contract