Tay River Salmon Restoration Mapping | Faro, Yukon

Project Snapshot

Project Overview

Introduction

In 2020, Underhill was engaged to support salmon habitat restoration in the Tay River region of Yukon. A rocky outcrop was identified as a major barrier to upstream spawning. Using drone technology, Underhill helped environmental stakeholders visualize and assess the site with clarity and precision.

Project Challenges

The Tay River terrain is narrow, slippery, and difficult to access by traditional means. The rock formation constricting the river also accelerates water flow, making it impossible for salmon to swim upstream. Accurately mapping the obstruction was critical for restoration planning.

Underhill’s Approach

Underhill deployed RTK-enabled drones to capture high-resolution imagery and generate a detailed 3D model of the site. The drone-based mapping method allowed for safe, efficient, and precise data collection over rugged terrain without disturbing the sensitive environment.

Notable Outcomes

• Accurate 3D surface models enabled evaluation of removal options
• Provided baseline data for engineering, planning, and habitat restoration
• Helped identify the most viable solution to restore upstream salmon access
• Supported long-term environmental goals and expanded potential spawning grounds

Technical Highlights

• RTK-enabled drone photogrammetry
• High-resolution 3D model of riverbed and rock barrier
• Safe and non-invasive survey method for remote terrain
• Geospatial data to support environmental engineering plans
• Visual decision support for river restoration projects
• Enabled future access to upstream salmon spawning habitat

Legacy and Learnings

This project demonstrated how drone mapping can play a vital role in environmental restoration. By providing engineers with detailed terrain models, Underhill helped unlock actionable insights that could lead to the restoration of significant salmon habitat. It’s a strong example of how technology supports ecological stewardship.