sewer

Thomas R. Fuszard

Utility districts understand that water and sewer pipes deteriorate over time. This is especially true for concrete pipes installed in sanitary sewer systems. An inherent issue with sewage is the build-up of hydrogen sulfide (H2S) gas, which can have far-reaching effects that may not be noticeable until a major problem occurs.

NASSCO member Stephen Tilson, Collection Systems Operations Consultant, Tilson Associates

Of all sanitary sewer operations, blockage removal is perhaps the most demanding and highly visible. For the purpose of this discussion a blockage is defined as the “stopping or interruption of sanitary sewerage flow.”

NASSCO member Barry Howell, General Manager, Visu-Sewer, Inc.

Without a doubt, the most misunderstood facet of sewer cleaning is the relationship between flows and pressures. Generally, pressure is mistakenly viewed as the wildcard or the reason for concern, and flow is usually ignored. Operators often misunderstand the operation of their pump, the relationship to hose diameter and length to performance and other variables of jetting.

A team from Tarlton Corp. installed a temporary diversion around a portion of a 96-inch influent pipe--believed to be only the second 96-inch diversion yet completed in the United States.

Jeff Griffin, Senior Editor

For the first time in its nine-year history, demonstrations will be part of the RehabZone at the 2010 UCT Underground Construction Technology International Conference & Exhibition, better known simply as UCT.

The County Sanitation Districts of Los Angeles County, California, has awarded a contract to SAK Construction of CA LP for the Los Coyotes Water Reclamation Plant Interceptor Sewer Rehabilitation Phase II project.

The RehabZone will be hosting live product and technology demonstrations at the Underground Construction Technology International Conference & Exhibition (UCT) in Tampa, FL, on Jan. 19-21, 2010.

Jeff Griffin, Senior Editor

Advances in inspection technologies have played a significant role in the ability to effectively rehabilitate underground sewer infrastructure.

The Metro Wastewater Reclamation District (MWRD) of Denver, CO, successfully completed a significant manhole rehabilitation project on its South Thornton Interceptor this past summer.

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