Features

Jeff Griffin, Senior Editor

Finding ways to effectively address problems posed by deteriorating laterals is one of the most serious challenges municipal and utility districts face in rehabilitating sanitary sewer infrastructures.

In this article, several industry representatives say what they believe is necessary to make significant progress in bringing laterals up to acceptable standards. Industry representatives sharing their views for this report agree on many points, differ on others.

A U.S. Environmental Protection Agency (EPA) report published earlier this year contains a wealth of information about rehabilitation technologies available for sewer force mains. The report, “State of Technology Report for Force Main Rehabilitation,” was prepared as part of the EPA’s Sustainable Water Infrastructure Initiative. Here, the principal author of the report gives his summary of the contents.

Jeff Griffin, Senior Editor

Cobble -- usually rounded pieces of rock that can range in size from a marble to a basketball -- is considered one of the most difficult and challenging soil conditions for making a directional drilling installation.

“Cobble is not fun,” said Boyd Simon, P.E., field services division manager for Ranger Directional Drilling.

Jeff Griffin, Senior Editor

Projects requiring excavation are recognized as among the most dangerous in construction, and protecting personnel who must work in trenches and surrounding areas from cave-ins is a priority with life and death implications.

For small jobs, trench protection may be as simple as dropping a trench box into the excavation. Larger jobs are more complex. A major project often requires extensive engineering and the use of specialized shielding and shoring.

John English

In just a few short decades, the use of horizontal directional drilling, as a method to install pipelines and utilities, has become common place.

The advantages of HDD are two-fold. HDD has already saved billions if not trillions of dollars in bottom line construction costs.

Jeff Griffin, Senior Editor

Grouts have a multitude of uses for many types of construction.

For utility construction, grouts are most often thought of for sealing leaks and joints in water and sewer pipe infrastructure, manhole rehabilitation and filling annular space between pipes and surrounding structures.

Dale M. Smith, P.E. Collinsville Branch Manager, Geotechnology Inc.

When faced with a project that is 133 miles long, spans two states and dozens of counties and features a tight schedule, logistics can be a serious foe. Communicating to many design team members and being responsive to the many challenges encountered in the field only complicate the efforts to successfully complete a project on time and on budget. Developing organizational and coordination skills into a serious strength and planning appropriately are paramount to operating efficiently, performing well and providing quality results.

Traci Read, Senior Editor

When horizontal directional drilling (HDD) professionals discuss the size of an HDD rig, they usually refer to the maximum pullback force the unit can develop. The most common industry standard for a large directional drilling unit is defined as having a minimum of 100,000 pounds of pullback force. In addition to pullback, the most common specifications used to categorize HDD equipment are rotary torque of drill stem, rotation speed and the size of drill pipe.

Rita Tubb, Managing Editor

As of mid-year, international/offshore reports show planned pipeline miles remain higher than actual pipeline construction mileage. Figures show the international sector accounts for 81,752 miles of crude oil, natural gas and refined products pipelines under construction and planned. Of these, 50,355 miles represent pipelines in the feasibility and front end engineering design phase while 31,215 miles account for pipelines in various phases of construction.

Jeff Griffin, Senior Editor

A small, high-tech Ohio business has developed technology that monitors temperature readings along a full segment of pipe during the curing of the CIPP (cured-in-place-pipe) lining process.

The procedure uses sensors strung by cable inside the pipe to be relined before the liner is inserted into the pipe, explains Jack Conte, president and chief executive officer of Zia Systems LLC.

Syndicate content