I took my sons to collect materials for the next large weir to be built on my pond inlet - there's another 1 acre pond 100 yards from this point, my inlet is direct runoff from the upper pond's 12" outlet. The water passes though a very shallow, boggy, threaded delta of a marsh which is extremely heavy with light clay sediments as it meets the pond. Max cfs is right around 10 where as max cfs on my feeder creek is around 50-100. max outflow of my pond's outlet is near 40-60
I have 10 cinder blocks, 4' sticks of 1/2" emt (for anchors), 2 large steel fence posts (primary anchors), 50 bricks, 100lbs of large river rock, and some filter aggregate. So far the filter aggregate is a pair of 5 gallon buckets of 1" to 3" sized river rock and 3 gallons of mixed sands. We will need to gather 3x this much aggregate to finish off the project. I've enlisted my 10 and 12 year old sons to help with this one haha
This weir will be vshaped with cinder blocks focusing the flow to a central outlet where it will flow over a field of bricks. The open end of the v will be layered with the large river rock, bricks, mixed aggregate and sand. Ahead of the aggregate will be a series of rock/brick/aggregate riffles to slow high flows.
