Location
New York, New York
Date
16 Apr 2004, 8:00am - 9:30am
Abstract
The City of Grand Forks, North Dakota obtains drinking water from both the Red River and Red Lake River through a system of raw water intakes, shallow pipelines and pump stations. During flood events, the City often loses access to the system. In addition, the banks of the rivers are subject to land sliding, which can easily damage the shallow intakes. This proved particularly true during the record flood event in 1997, and resulted in the design of a new setback levee system by the U.S. Army Corps of Engineers. As a result, the City decided to construct a new gravity raw water intake system inland of the future levees. The design had to address the installation of pipe through soft and weak clay in a known landslide area to depths of up to 80 feet. Horizontal directional drilling (HDD) was chosen as the means of construction. Design issues associated with HDD included the potential for squeezing ground at the deepest sections of the alignment, the potential for hydraulic fracturing beneath the river bottom and at the exit points, river taps, penetrations though a large-diameter caisson pump station. Additional construction issues included bore accuracy and grade to handle design curves, control of squeezing ground at the caisson penetrations, and control of the bore annulus as a potential flow path for river water during construction.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
5th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 2004 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Dorwart, Brian C.; Fischer, Gregory R.; Gerszewski, Wayne L.; and Yavarow, Michael K., "Directionally Drilled Raw Water Intakes, Grand Forks, North Dakota" (2004). International Conference on Case Histories in Geotechnical Engineering. 14.
https://scholarsmine.mst.edu/icchge/5icchge/session06/14
Directionally Drilled Raw Water Intakes, Grand Forks, North Dakota
New York, New York
The City of Grand Forks, North Dakota obtains drinking water from both the Red River and Red Lake River through a system of raw water intakes, shallow pipelines and pump stations. During flood events, the City often loses access to the system. In addition, the banks of the rivers are subject to land sliding, which can easily damage the shallow intakes. This proved particularly true during the record flood event in 1997, and resulted in the design of a new setback levee system by the U.S. Army Corps of Engineers. As a result, the City decided to construct a new gravity raw water intake system inland of the future levees. The design had to address the installation of pipe through soft and weak clay in a known landslide area to depths of up to 80 feet. Horizontal directional drilling (HDD) was chosen as the means of construction. Design issues associated with HDD included the potential for squeezing ground at the deepest sections of the alignment, the potential for hydraulic fracturing beneath the river bottom and at the exit points, river taps, penetrations though a large-diameter caisson pump station. Additional construction issues included bore accuracy and grade to handle design curves, control of squeezing ground at the caisson penetrations, and control of the bore annulus as a potential flow path for river water during construction.
