Construction equipment working near a waterfront development site

Environmental Assessments and Waterfront Projects: How the Process Works

By James Whitfield | November 23, 2025
Development

Before a shovel hits the ground on most major waterfront projects in Ontario, someone has to answer a fundamental question: what will this do to the environment? That answer comes through the environmental assessment process, a regulatory framework that has shaped development across the province since the 1970s. It is also a process that frustrates virtually everyone involved, from developers who see it as slow and expensive to environmentalists who consider it toothless.

Understanding how environmental assessments work is essential for anyone trying to follow waterfront development in Ontario. The process determines which projects proceed, which get modified, and which get blocked entirely. It also reveals a great deal about the balance of power between economic interests, community concerns, and environmental protection.

The Legal Framework

Ontario's Environmental Assessment Act, first enacted in 1975, requires that certain types of projects undergo an assessment before they can proceed. The act applies primarily to public sector undertakings: municipal infrastructure, provincial highways, transit projects, and waste management facilities. Private sector developments are generally not subject to the act, although they may trigger federal impact assessment requirements if they affect areas of federal jurisdiction, such as fisheries, navigable waters, or Indigenous rights.

Lush green wetland area adjacent to a development zone

For waterfront projects, this distinction matters. A municipal boardwalk, a public marina expansion, or a new wastewater treatment plant near the water will likely require a provincial environmental assessment. A private condominium development on the waterfront may not, even if its environmental impacts are comparable or greater.

The federal Impact Assessment Agency of Canada can step in when a project may cause significant adverse effects in areas of federal jurisdiction. On the Great Lakes, this often involves projects that could harm fish habitat, alter water flows, or affect species at risk. Federal assessments tend to be more rigorous than provincial ones, but they also apply to fewer projects.

What an Environmental Assessment Involves

A typical provincial environmental assessment in Ontario follows a structured process. The proponent, usually a municipality or government agency, begins by identifying the problem or opportunity the project is meant to address. They then evaluate alternative ways to solve the problem, including the option of doing nothing. For each alternative, the potential environmental effects are assessed, along with mitigation measures to reduce those effects.

The term "environment" in Ontario's act is defined broadly. It includes the natural environment (air, water, soil, wildlife), the social environment (community character, cultural heritage, recreation), and the economic environment (employment, property values, tax base). In theory, this means an environmental assessment considers the full range of impacts a project may have on a community.

Professional reviewing documents and maps at a desk

Public consultation is a required part of the process. Proponents must notify the public about the project, hold information sessions or open houses, and respond to comments and concerns. For waterfront projects, these consultations often draw large crowds. Residents who live near the proposed site tend to have strong opinions about what should and should not happen on their stretch of shoreline.

Once the assessment is complete, the proponent submits it to the Ministry of the Environment, Conservation and Parks for review. The minister can approve the project, approve it with conditions, or refer it to a formal hearing. In practice, most assessments are approved with conditions, which may include monitoring requirements, habitat compensation measures, or design modifications.

Where the Process Falls Short

Critics of Ontario's environmental assessment process point to several weaknesses. The most common complaint is that the process is reactive rather than proactive. Assessments are conducted project by project, with little consideration of cumulative effects. A single marina expansion along a shoreline might pass its assessment with flying colours. But when five marinas on the same stretch of coast all expand within a decade, the combined impact on water quality, fish habitat, and community character may be significant. The current process has no effective mechanism for evaluating these cumulative pressures.

Another criticism is that the process gives proponents too much control over the scope and quality of the assessment. The proponent hires the consultants, defines the study area, and selects the methodology. While the ministry reviews the final product, it rarely commissions independent analysis. This creates an inherent tension: the entity that wants the project approved is the same entity producing the evidence on which the approval decision is based.

Community groups in towns like Collingwood, Cobourg, and Port Hope have raised concerns about the quality of assessments submitted for waterfront infrastructure projects. In several cases, residents hired their own experts to review the proponent's work and identified gaps in data collection, flawed modelling assumptions, and understated impact predictions.

The Role of Conservation Authorities

Scenic waterfront with mountains and lake at golden hour

Conservation authorities play a critical but sometimes overlooked role in the environmental review of waterfront projects. Under Ontario's Conservation Authorities Act, these agencies regulate development in areas near watercourses, shorelines, wetlands, and hazard lands. Any project within a regulated area requires a permit from the local conservation authority, which conducts its own technical review independent of the provincial environmental assessment.

This can create overlap and confusion. A project may require both a provincial environmental assessment and a conservation authority permit, each with its own process, timeline, and requirements. Developers sometimes find themselves satisfying one agency's demands while running afoul of another's. Community members may attend consultations for both processes, unsure which one has the final say.

Efforts to streamline the process have been made, most recently through amendments to the Environmental Assessment Act in 2020 that created new exemptions for certain types of projects. Environmentalists warned that these exemptions would allow harmful projects to proceed without adequate review. The government argued they would reduce unnecessary duplication and speed up the approval of beneficial infrastructure.

What Communities Can Do

For residents concerned about a proposed waterfront project, the environmental assessment process provides the most formal opportunity to have their voices heard. Participating early and consistently matters. Submitting written comments during the public review period creates a paper trail that can be referenced later if the project causes problems. Attending public information sessions and asking pointed questions about methodology, data sources, and mitigation commitments puts pressure on proponents to be thorough.

Connecting with local advocacy groups can also help. Experienced organizations often know which aspects of an assessment to scrutinize and can help translate technical documents into plain language. In some cases, pooling resources to hire an independent technical reviewer can reveal weaknesses in the proponent's work that might otherwise go unnoticed.

The environmental assessment process is imperfect. It is slow, costly, and sometimes captured by the interests it is supposed to regulate. But it remains the primary mechanism through which environmental protection is built into waterfront development decisions in Ontario. Ignoring it means ceding the field to those who would build first and deal with consequences later.

James Whitfield

James Whitfield

James covers land use, zoning, and waterfront development across Ontario. Before joining The Shoreline Journal, he reported for community newspapers in Simcoe County.