The flooding is a function of 50 square miles of funnel shaped hills draining into a 4 square mile lake, with one tiny outlet. Think of a two gallon bucket with a very small drain hole near the top. This would represent our lake and its one drain, Oaks Creek. To be made to scale, the drain hole would ONLY BE 0.02 inches, two hundredths of an inch in diameter!!! That’s about the same thickness as a penny!
During heavy rains, this “lake” would be filled by another 5 gallon bucket full of water, representing all the water flowing into the lake from the entire watershed. There is just no way the “lake” bucket can handle this larger amount without overflowing.
Some say, don’t lower the beam. The beam was actually only down for 20 days in mid May when we were experiencing a mini drought and the lake rose 3 inches. The beam has been up since May 25, allowing full outflow for the last six weeks. Some say remove the dam entirely. If the dam were holding back water from draining down Oaks Creek, you would see a higher creek level ahead of the dam and a lower level below the dam, as we do during dry periods. This is not the case now. There is one continuous flow of water through the dam and on downstream. This tells us that whatever is limiting water flow out of Canadarago is south of our dam ... basically the small width of the 7 mile stream.
We know that a few miles down Oaks Creek, where Liddell Creek comes in from the West, the elevation of the creek actually begins to rise. This means that, not only do we have a very minimal decreasing slope to encourage water to flow down the creek, but at one point, the creek bottom begins to gain elevation, causing some flow reduction. This fact has been confirmed by the Army Corp of Engineers back in 2006, and by the independent “Hydrology study” done in 2011.