Problems will arise working on existing infrastructure. It is important to develop a plan for existing buildings, roads and other structures so that individuals will face minimal disruption. When working with Storm or Sanitary Sewer we face all sorts of issues that require immediate attention prior to performing repair work.

Sanitary Sewer

In Sanitary Sewer systems there is no point where there will be no flow.   Sewers are always used for:  Dishwashers, showers, toiletry use, etc…  Because of this bypass pumping is commonly used when repairing the line section.

• Typical bypassing consists of installing a pump upstream from the pipe that is to be repaired.   A temporary pipeline or layflat is then placed from the pump to the manhole downstream of the repair.   Temporary plugs may also be used depending on additional flows coming into the line section.  Depending on the area will determine what size bypass will be required.

Storm Sewer

In Storm Sewer the water level is usually dictated by the groundwater level and recent rainstorm events.  In situations where we are bypassing storm sewer, sandbags are usually required to create a stopgap between the area of concern and the existing water entry way.

• Temporary bypass is not always necessary in storm so long as we can eliminate the flow into the repair pipe.  if more work is required above sandbags we may use a submersible pump or a 3 inch trash pump to detwater the site.

Our Practice:

Over the years we have used small bypass with lay flat materials to large bypass that is required to be installed by buttfusing the joints together.   The job will dictate the bypass and how we approach the work.  In our previous work we have performed as small as a 3″ bypass to the size of 2 – 12 inch bypass pumps running at all times.

• 3 inch bypass
• 4 inch bypass
• 6 inch bypass
• 8 inch bypass
• 12 inch bypass
• submersible pumps
• sand bag the area