According to the Carroll County Sheriff’s Office, the dam will reach 20,000 CFS (cubic feet per second, or the equivalent of over 149,610 gallons of water flowing by a particular point in one ...

Then, multiply the volume by 7.48 — one cubic foot of water is 7.48 U.S. gallons, and multiplying by this number tells you the pool holds roughly 16,830 gallons of liquid.

At this time of year, the average flow rate for the Rock River at the USGS gauge near Rock Valley is a little more than that — about 1,500 cubic feet (roughly 11,000 gallons) per second. How ...