Indigo is intermittetent. I have seen the channel full and overflowing on most occasions but also dry. I have no info on how frequently it happens, but I would see it a few times a year when I used to live at Old Faithful. The pauses aren't very long as the bacteria mat never seems to dry out. MK ________________________________ From: carolyn loren <caroloren98 at hotmail.com> To: geyser listserve <geysers at lists.wallawalla.edu> Sent: Tue, January 11, 2011 2:56:44 PM Subject: [Geysers] Midway report Let's see if I can explain this guide report. The runoff channel that flows into the Firehold River from Grand Prismatic, south of Exelsior's runoff channel, was reported empty yesterday morning, 1/10. And Grand was reported by visitors this morning at 0921. We'll be out predicting tomorrow morning... Carolyn Loren -------------- next part -------------- An HTML attachment was scrubbed... URL: </geyser-list/attachments/20110113/3b84e649/attachment.html>