Spillway pipe can be installed several ways.
Farm pond drain pipe repair.
Sometimes a drop inlet style pipe can replaced with a canopy inlet design.
Consult with your engineer about the possibility.
More than 30 years ago i leased a fish farm.
Pond lake management.
One three acre pond had a broken valve so i cut a round piece of plywood to insert into the lip of the concrete drain pipe inside the pond five feet deep on the bottom.
However draining the pond and sealing the entire bottom may cost thousands of dollars.
Replacement of a rusted outlet pipe or sealing a small leak near the top of the pond may be inexpensive.
Do not attempt to fill the old pipe with concrete.
Dam overflow repair standpipes siphons and overflows need to be regularly monitored to avoid clogging which can cause flooding and damage to your pond s integrity.
You may want to ask around or get several quotes before making a decision.
Agri drain is america s most complete manufacturer and supplier of products for drainage water management sub irrigation wetlands ponds lakes erosion control and land improvement.
Do not dig a vertical trench to dig out the old pipe or to install a pipe in a pond without a pipe.
Outlet structures are built to keep the water surface in the pond at its optimum level and to be able to drain the pond for maintenance.
A pipe can also allow you to set an exact water level with options to raise or lower the water level by adding or removing pipe extensions.
Sometimes a drain pipe at the pond bottom is connected to the spillway so you can lower or empty the pond for repairs fish harvests or weed cleanups.
Outlet structures are built to keep the water surface in the pond at its optimum level and to be able to drain the pond for maintenance.
It will wash out.
If there is too much water in your pond it may flow over the banks.
If you have a clog in a pipe and decide to unclog the pipe yourself understand the forces of water.
The use of local clay will be inexpensive compared to bentonite which may cost 50 to 100 per ton without hauling costs.
Structures valves gates.
Overflows can cause costly erosion damage to the infrastructure.
They may have a list of contractors that do pond work and may come out to look at the pipe.
Overflow pipes keep the water in your pond from overflowing the banks.
I suggest you contact your county conservation district.