HDD Used to Install New Force Main Under Lake Meade


HDD Used to Install New Force Main under Lake Meade

Authors:

Tim Marsh, Hampton Roads Sanitation District, Virginia Beach, VA
Brandon Beamon, Michael Baker International, Virginia Beach, VA
Rachel Maupin, Underground Solutions, Inc., Poway, CA

Abstract: Hampton Roads Sanitation District (HRSD) was facing an aging infrastructure undersized for continuing population growth within the City of Suffolk, Virginia. In addition to meeting increased demands, HRSD needed to minimize the likelihood of sewage overflows in wet weather conditions, compelling them to increase the capacity, to reduce system pressures and to improve operating conditions of its sewer system. One pipeline in their Suffolk service area was nearing 50 years in age and at 14-inch and 18-inch diameters, was undersized for the future service requirements. HRSD undertook a two-phase, 26,000-foot force main replacement project to install a new 24-inch pipeline. The new alignment ran along main roads and an abandoned railroad corridor which included a trenchless crossing of Lake Meade. Michael Baker International designed a 3,200-foot horizontal directional drill (HDD) to cross under the lake using a detailed drill geometry with varying vertical and horizontal curves to maneuver through the clayey soils. The development of the HDD design, material selection, and successful installation is examined in detail. This paper will also focus on the series of events that followed complications during pipe installation and how the driller’s ingenuity recovered the installation.

Publication Date: 2018

Presented at:
NASTT’s 2018 No-Dig Show Palm Springs, California
March 25-29, 2018 | Paper Number: MM-T2-05


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