Slipline Example 2
The conduit through this dam was made of corrugated metal. A valve was placed at the downstream end by the owner. The combination of a downstream valve and a corrugated riser pipe led to significant leakage. The pipe was is good condition, but it wasn't made to be pressurized. Sliplining the conduit with HDPE pipe successfully restored the functionality of the dam.
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The CMP outlet of this dam needed rehabilitation. The downstream risk was relatively low.
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The conduit was sliplined with a fused HDPE pipe.
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A downstream valve was used, which is generally discouraged; however, fusion welds do not tend to leak. The valve was considered acceptable because many of the problems with upstream gates in cold climates were avoided.
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Sliplining this dam's conduit was advantageous because it was cheaper than full replacement and provided a reliable solution.
Revision ID: 1320
Revision Date: 06/23/2022