I am attaching a few pics to show the conundrum I'm in right now.... it is a new pond, just built it last summer and I obviously miscalculated the amount of water coming into it as it filled the 18 overflow pipe I have and then ran over the dam.... prior to that it had already ate the overflow side of the dam up pretty good even though I had placed a LOT of large rocks on the dam. What I am planning on doing right now is to pump the pond down and then create an emergency spillway on the left of the spillway pipe as you look from the pond side. I believe this is an old logging road cut into the hillside probably 15-20 years ago so it should be solid. I was planning on just digging it out with my Kioti backhoe and FEL. I know I don稚 have much freeboard and I am planning on building the dam up some over the current pipe with the excess dirt I take out for the spillway. Although some of the dirt will also be used to fix the dam on the overflow side where it is washed out. I would like some ideas as to if this is the best way to do it without spending a fortune. I am going to create a concrete and rock tailrace under the overflow pipe as well to keep it from eating away the dam on the overflow side.
The way I see it right now I have possibly 3 options, as listed below:
1) Dig out an emergency spillway on the area marked in the pic. It is probably about 75' to the ravine from the pond that I would need to dig out.
2) Remove the existing 18" overflow and create a concrete spillway wider that goes over the dam where the pipe was and forget the emergency spillway.
3) Remove the 18" overflow pipe and replace it with a larger 24" - 30" pipe.
Any other ideas or which of these sounds the best? Thanks!
The way I see it right now I have possibly 3 options, as listed below:
1) Dig out an emergency spillway on the area marked in the pic. It is probably about 75' to the ravine from the pond that I would need to dig out.
2) Remove the existing 18" overflow and create a concrete spillway wider that goes over the dam where the pipe was and forget the emergency spillway.
3) Remove the 18" overflow pipe and replace it with a larger 24" - 30" pipe.
Any other ideas or which of these sounds the best? Thanks!