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Trenchless Technology

Welcome to the Trenchless Technology Reference Library. Explore and expand your horizons with information for and about those who build, manage and maintain municipal infrastructure and systems.

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Documents

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Challenge of Change Challenge of Change

Date added: 08/07/2010
Date modified: 08/07/2010
Downloads: 0
It isn’t always easy to manage and maintain an older water distribution system in a historic city like Wilmington, Del. Lately, the one constant has been change. “Change is our biggest challenge,” admits Lawrence Carson, city engineer. Changes Carson has championed, in the forms of new data collection technology, rehabilitation techniques and GIS mapping, are helping this bustling city improve water quality and maintain its vital water distribution system in a highly efficient and cost-effective manner.

Highway and Canyon Highway and Canyon

Date added: 08/07/2010
Date modified: 08/07/2010
Downloads: 1
After several pipe failures and sewage spills in a critical piece of its Land Outfall Interceptor Sewer, the Vallecitos Water District (VWD) found innovative methods for replacing and rehabilitating the pipe in a timely and cost-effective manner.

Keeping The Lines Open Keeping The Lines Open

Date added: 08/07/2010
Date modified: 08/07/2010
Downloads: 0
The City of Atlanta wins support for major infrastructure projects with an extensive public participation and information initiative

Mains In Motion Mains In Motion

Date added: 08/07/2010
Date modified: 08/07/2010
Downloads: 0
It’s hard enough maintaining an aging sewer system under the best of conditions. It’s harder still when the terrain is challenging and the earth itself regularly moves. Stege Sanitary District, in California’s San Francisco Bay area, must cope with a geologically active area over a part of the San Andreas Fault, source of several major earthquakes and frequent tremors. The terrain is also hilly, and access to lines for cleaning and inspection is not always easy. Still, the district has steadily reduced stoppages and overflows on its 150 miles of mains and has created a system that can withstand seismic punishment.

Open To Suggestion Open To Suggestion

Date added: 08/07/2010
Date modified: 08/07/2010
Downloads: 1
Trenchless technology has opened up a world of opportunities for cost-effective wastewater infrastructure rehabilitation and life extension for the City of Nampa, Idaho. By being open-minded and willing to consider new technologies, the city can effectively maintain its system on time and on budget and add more projects to its capital improvement program than it could complete using digand-replace methods.

Racing Against The Clock Racing Against The Clock

Date added: 08/07/2010
Date modified: 08/07/2010
Downloads: 0
Could CCTV technology answer questions about the condition of a critical water supply line for one of California’s largest water agencies? That was the hope of Chris Beggs and his team at the Metropolitan Water District (MWD) of Southern California...

A Natural Path A Natural Path

Date added: 08/07/2010
Date modified: 10/11/2010
Downloads: 0
When five inches of rainfall in a two-hour period revealed that its system’s stream conflicts were more significant than originally thought, Johnson County Wastewater (JCW) decided to take a proactive approach to maintaining its sanitary sewer conveyance system. Its efforts have gained national recognition for forward-thinking system management and maintenance that uses asset-management information, multi-tier physical pipeline inspection, and analysis tools such as geomorphology, hydrology and plant taxonomy to develop the most effective and sustainable means of rehabilitation.

No Big Dig No Big Dig

Date added: 08/07/2010
Date modified: 08/07/2010
Downloads: 0
As a suburb of Boston, Mass., the Town of Dedham was all too familiar with the pitfalls, disruption and enormous costs of infrastructure projects involving a “big dig.” Not wishing to experience that firsthand, Dedham turned to trenchless technologies, especially cured-in-place pipe lining (CIPP), when looking for solutions to address its inflow and infiltration issues. A program of planned inspection, pipe cleaning, and follow-up rehabilitation with CIPP lining has significantly reduced I&I and as a result will bring savings in operational and wastewater treatment costs in the years ahead.

Digging Deep Digging Deep

Date added: 08/07/2010
Date modified: 08/07/2010
Downloads: 0
The City of Cambridge, Mass., one of the nation’s most densely populated cities, faced a critical need in 2000 to improve its stormwater infrastructure and stop significant flooding within one of its most populated and desirable neighborhoods. With the help of experts at SEA Consultants and MWH Americas Inc, the city’s Department of Public Works (known locally as The Works) devised an extraordinary solution: 1,000-footlong storage tanks under the busy, narrow streets.

Making I & I Reduction Manageable Making I & I Reduction Manageable

Date added: 07/27/2010
Date modified: 07/27/2010
Downloads: 1
The historic City of Alexandria, Va.,effectively uses outside resources with a “manageable chunks” approach to reduce I&I and rehabilitate aging infrastructure.

Blessing In Disguise Blessing In Disguise

Date added: 07/08/2010
Date modified: 07/08/2010
Downloads: 1
Facing a consent decree challenge head-on, the City of Atlanta has a multifaceted program to put its aging sewer system on a path toward becoming a model of healthy, sustainable underground infrastructure.

Something Old, Something New... Something Old, Something New...

Date added: 07/08/2010
Date modified: 07/08/2010
Downloads: 1
A new twist on a proven trenchless rehabilitation technology shows promise for resolving a California water company’s steel pipe replacement issues

Keeping Things Sweet In Hershey Keeping Things Sweet In Hershey

Date added: 07/08/2010
Date modified: 07/08/2010
Downloads: 0
Out of Sight but Always in Mind...Derry Township Municipal Authority combines inspection and maintenance to keep the pipes flowing freely in the community known as Chocolate Town, USA

Border Crossing Border Crossing

Date added: 07/08/2010
Date modified: 07/08/2010
Downloads: 0
A crew from Innerline Engineering inspects a tunnel found by the Department of Homeland Security at the U.S./Mexico border. Submitted by: Jim Aanderud, Innerline Engineering