drm
Silver Member
Yes, riprap is the large boulders you see along the sides of an earthen dam on the lake. The large rocks take the beating of the waves so that erosion of the soil/gravel beneath is not washed away. It should be used on the up stream side of the pipe to direct the water into the culvert so that the sides of the culvert are not washed away and undermined. The down stream side could also be washed out so it may need to be installed in the bottom of the stream bed at the end of the pipe.
If you are talking to excavators who have experience in this type of work they will know how to install it and how much should be used. I have only installed little (18” – 24”) culverts and only need to worry about rain runoff so I am not sure of specific details. But, I would assume some type of fabric/plastic should be installed under the riprap.
…Derek
If you are talking to excavators who have experience in this type of work they will know how to install it and how much should be used. I have only installed little (18” – 24”) culverts and only need to worry about rain runoff so I am not sure of specific details. But, I would assume some type of fabric/plastic should be installed under the riprap.
…Derek