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Civic & Municipal Civil & Municipal Engineering

Hood River Outfall Project

Comprehensive redesign and management of the City's 60-inch combined sewer and sanitary outfall into the Columbia River.

Bell Design Company was contracted by the City of Hood River to oversee and manage the critical redesign of the municipal wastewater treatment plant's 60-inch combined sewer and sanitary outfall.

The Challenge & Scope

The core objective was to develop a new confluence zone capable of safely and efficiently flushing treated effluent into the Columbia River. This required extending the existing sewage pipeline under the Hook road and positioning it further into the active river currents on the Wells Island side of the plant, demanding precise environmental and hydraulic considerations.

The Solution

BDC delivered an integrated civil engineering solution by evaluating several alternative outfall locations to optimize environmental safety and structural integrity. Our team performed comprehensive mixing zone analyses and rigorously evaluated the wastewater treatment plant's hydraulics, ensuring the new outfall design met all municipal and environmental regulations while maintaining long-term operational resilience.

Key Deliverables

  • Civil Engineering 60-inch sewer & sanitary outfall redesign.
  • Environmental Analysis Comprehensive mixing zone assessments.
  • Hydraulic Analysis Wastewater treatment plant capacity modeling.
  • Project Management Municipal oversight and location routing.

Project Gallery

Crane operation and heavy construction activity at the outfall project, showing a large lifting operation in a river or shoreline construction setting.
Surveyor or field crew working at the outfall project, capturing the active site investigation and construction oversight in a rugged environment.
Tree and shoreline vegetation at the outfall site, showing the natural riverbank conditions in proximity to the infrastructure work.
Outfall pipe installation or pipework in progress, illustrating the municipal infrastructure and discharge system being constructed.
South-facing outfall site view showing the riverbank, pipe infrastructure, and shoreline conditions of the project.
Top-down or elevated aerial view of the outfall project area, showing the engineered water discharge features and surrounding river landscape.
West-facing view of the outfall structure, highlighting the riverbank and infrastructure geometry of the constructed discharge system.
North-facing view of the outfall project, showing the shoreline configuration and the installed pipe infrastructure.
East-facing view of the outfall system, illustrating the site’s orientation and the engineered municipal discharge arrangement.
Log and natural debris near the outfall shoreline, showing the riverbank conditions and environmental context around the constructed facility.
Rocky shoreline and river edge near the outfall project, capturing the natural terrain and infrastructure interface along the Columbia River setting.

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