Pond Boss Forums POND CONSTRUCTION Renovating a Pond or Lake? Old drain pipe leaking

Just a WAG here. There are companies that do hydraulic jacking with I believe a cement slurry. I wonder if they could pump cement into the culvert, displacing the water and sealing it up at the same time?

I've seen larger jobs where they pounded in "W" shaped long pieces of steel that interlocked, and kept the water at bay so excavation could be done on the outside of the steel. Once the work was completed, they had a vibrating grabber that lifted out the long pieces (an excavator was used for lifting power).