BlueFox Engineering

Project Overview

‍BlueFox was retained by Mancal Energy and Hammerhead Resources to evaluate the feasibility of several HDD crossings of Patterson Creek in northwestern Alberta. The selected pipeline routes crossed over Patterson Creek at three different locations, each with moderately steep banks and a deeply incised Patterson Creek channel.

Subsurface Investigation

‍Due to difficult access conditions, a heli-portable geotechnical investigation was required to access the mid-point of the crossing location at the first Patterson Creek crossing location. Geotechnical investigations at the three crossings found clay tills, including significant sands, gravels, cobbles, and coal deposits, underlain by sandstone and mudstone bedrock. A geophysical analysis was selected to supplement borehole data gathered at the third crossing location.

Installation Method and Surface Casing

‍Temporary surface casing was installed on both sides at two of the locations, requiring execution by intersect method. The second crossing only required temporary surface casing to isolate unconsolidated materials from the bore path on entry side and was executed by conventional HDD method.

Engineering and Design

‍BlueFox Engineering completed preliminary engineering, geotechnical, and geophysical studies, and detailed HDD crossing design for each location. We provided HDD plan, profile, pullback, and lifting details for all crossings, along with a pullhead design, HDD contractor tendering, and supplied on-site HDD inspection and construction engineering during execution for all three locations.

 
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Patterson Creeks

Project Overview

Subsurface Investigation

Installation Method and Surface Casing

Engineering and Design

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