I noticed the spikes also. It happens every day at 1:15, and has been increasing for 6 or 7 days, corresponding nicely with the total diversion of the river. I e-mailed the GS asking about its cause, but haven't gotten an answer yet. Wondering if they are putting the one largely inflated number in there to crank the daily flow average (long term record)...with one spike from 2.5cfs to 2800cfs for just one reading in a 24 hr period, the daily avg. goes from ~3cfs to around 30cfs. That makes it look like there is actually base flow in the river; three words: Glade Res. Sucks!
What does education often do? It makes a straight-cut ditch of a free, meandering brook. HENRY DAVID THOREAU, Journal