Go to http://www.ferc.gov/docs-filing/esubscription.asp
Follow the instructions to subscribe.
Click on the Log-in button if you have already registered.
Enter your registered email address or FERC ID and your password.
On the next screen, select eSubscription.
Enter docket number CP13-499 (No Spaces)
Click on the Search button and wait a moment for a response.
When this information appears:
CP13-499-000 Application for a Certificate . . .
Click on the blue cross in the far right column under the heading labelled "Select"
Wait for it to appear in "Selected Dockets"
Click on the Subscribe button.
Once you do this, you'll be notified via email as correspondence gets filed by FERC in docket number CP13-499, the Constitution Pipeline docket.