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Storm Drain / Culvert Pipe Restoration

Eliminate infiltration & settlement in collapsing storm drains.

Concrete and corrugated metal storm drains and culverts eventually deteriorate to the extent that they allow sand infiltration, water ex-filtration, and eventually they collapse. The most common consequences are that the ground above the storm drain settles or caves in, which endangers buildings, roads, homes and other structures. Of course, ordinary storm flow is interrupted which causes flooding.

Storm Drain Pipe Lining Using CIPP and Thermo-Formed Pipe

First the storm drains are cleaned using a vac-truck to remove sludge and physical debris. Next a pipe video inspection is performed to determine the distance of pipe to be lined. There are two common types of storm drain pipe lining:

Storm Drain Rehabilitation by Cured-In-Place Pipe (CIPP)

Corrugated Storm Drain Pipe Lining Using CIPP

This storm drain pipe lining technique installs a long fabric felt tube that has been saturated with resin. The lining is pulled into the pipe, inflated, and then cured using hot water or steam. The resulting new inner pipe is designed for load bearing applications such as storm drains located under roads or railways and is approved by the DOT.

Storm Drain Pipe Lining Using Thermo-Formed Pipe

Storm Drain Pipe Lining Using Deformed U-Shaped Liner That Is Later Inflated and Hardened In Place

Another common method used in storm drain pipe lining is the installation of a heated HDPE pipe that has been deformed into a u-shape and heated to make it flexible so that it will fit into the pipe. Next it is inflated until it matches the shape of the pipe and then it is cooled which hardens the pipe in place.

Storm Drain Replacement By Pipe Bursting

Sometimes storm drains are so badly damaged that the only pipe replacement option is pipe bursting. Unlike other pipe rehabilitation techniques, the initial step of cleaning the pipeline is not so important. What is critical however is that a video camera or jetter hose or some other tool can pass through the pipe from one end to the other so that a strong cable can be attached to it. The strong cable is then attached to a pointed conical “bursting” head, which in turn is attached to the new pipe that will be pulled into place behind the bursting head. Sections of new pipe are attached to one another using heat to fuse the pipes permanently. Generally High Density Polyethylene (HDPE) pipe is used. More…

Storm Drain Slip Lining

Sometimes the fastest and least expensive way to restore storm drains is by slip lining. This process literally pulls a new smaller diameter pipe into the old pipe. This reduces flow rate, but in some cases the original pipe was over-sized when originally installed.