A Study on the Design-Build Delivery of a 9,000-Ft Intersect Horizontal Directional Drill Under the Barnegat Bay


A Study on the Design-Build Delivery of a 9,000-Ft Intersect Horizontal Directional Drill Under the Barnegat Bay

Authors:

Rob Hotz, Laney Group, Spring, TX United States
Maureen Carlin, Laney Group
Kerby Primm, Laney Group
Mike Healy, Stantec
Marc Pannaccione, New Jersey Natural Gas
Nick Michels, Laney Group

Abstract: This case study discusses the recently constructed South Seaside Reinforcement Project for New Jersey Natural Gas (NJNG). It included the 9,000-ft HDD installation of a 12” diameter secondary pipeline from existing mainland infrastructure located in Berkeley Township, NJ under the Barnegat Bay to the South Seaside Peninsula. The geometry of the drill included multiple horizontal and vertical curves. Due to the substantial length this project was executed using the intersect method and utilized gyroscopic steering tools because wireline over the water was not permitted. Adding to the complexity of the drill was the presence of multiple geotechnical formation types over the long crossing including varying layers of sand, clay and gravel which required constant adjustments to drilling fluid properties and made it difficult to maintain returns over the 5,000+ feet drilled from each side for the pilot-hole intersect. Additional project challenges included being directly impacted by multiple Nor’easters during construction which left both entry and exit workspaces completely underwater during periods of high tide. On several occasions, drilling operations had to be suspended so that crew members could address the safety hazards of jobsite flooding. In the end, however, the project was completed successfully with zero lost time due to injury. In addition to the discussion specific to the construction execution of this project, this paper highlights the benefits of the design-build project approach that includes Laney Directional Drilling (Laney) in partnership with Stantec Consulting Ltd. (Stantec) for integrated HDD engineering design and project construction services.

Publication Date: 2019

Presented at:
NASTT’s 2019 No-Dig Show Chicago, Illinois
March 17-21, 2019 | Paper Number: MM-T2-01


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