I just went over South St. Vrain, and it is at the minimum runnable flow of probably just north of 100 cfs. There is a "gauge rock" if you stand on the bridge where Old South crosses SSV, look upstream, and if the water is flowing over the flat rock located river left of center (viewer's right of center), then SSV is runnable.
I checked out Black Bear Hole and A-hole too, and both are looking great!
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This blog sponsored by the Lyons Outdoor Games, Lyons, Colorado.