Negotiating Restoration through Representation: The role of visualization in the public process of Riverside Dam

Abstract

As climate change intensifies ecological uncertainty and infrastructure risk, low-head dam removals have become sites where environmental, cultural, and political tensions converge. This thesis examines the case of Riverside Dam in Cambridge, Ontario (2008-2019), to explore how visualization acts not only as a tool of communication but as an active agent in shaping negotiations over the whether to remove, rebuild Riverside Dam. The Municipal Class Environmental Assessment (EA) for Riverside Dam including consultant drawings, City reports, and community responses based on eight “preferred alternative” designs for the dam. Visual materials play a decisive role in how potential futures are understood, aiding in understanding, participation, and decision-making. Drawings are political tools that can include or exclude voices, clarify or obscure impacts, and build or erode public trust. By closely studying the Municipal EA process for Riverside Dam, this thesis examines how values, trade-offs, and potential designs are communicated through visualizations and contested. Drawing from literature on landscape architecture visualization studies, Indigenous knowledge systems, and environmental design, the thesis proposes a framework for negotiated design to better support engagement with the community. Negotiated design in this thesis is an approach to environmental planning and restoration that prioritizes structured dialogue and collaboration among diverse stakeholders with often competing interests. This framework is a call for transparency, accessibility, and legibility in architectural drawings in so that the public is aware of what is at stake with each “preferred alternative” within the Environmental Assessment process. Within the proposed framework, this thesis lays out four visualization principles including: 1) contextual clarity, 2) embodied perspectives, 3) temporal layering, and 4) making conflict visible. Engagement principles also emphasize the use of physical space, co-creation, and writeable, decision-oriented drawings. Rather than producing an original design proposal, this thesis reinterprets three existing shortlisted design options (or “preferred alternatives”) for the Riverside dam: rebuilding, removing and naturalizing, and building an offline dam and naturalizing the river. Through different forms of visualization, the framework developed in the thesis are applied to visualize trade-offs, reveal biases, and imagine the realities of each design to best engage and educate the public. These River drawings are not final answers but rather invitations for further negotiation. By centering legibility over resolution, this work positions visualizing ecological projects as a collaborative and evolving act. It contributes to broader conversations on climate resilience and adaptation, decolonial landscape practice, and the role of design in environmental governance.