Hilda Wind Power Project, Alberta

Location: Cypress County, Alberta
Owner / Operator: Hilda Wind LP
Developer: Renewable Energy Systems Canada Inc. (RES)

How HGC provided Post‑Construction Noise Compliance Assessment for a Wind Power Project

The Hilda Wind Power Project is a utility‑scale onshore wind facility designed to contribute renewable electricity to Alberta’s grid. The facility is a roughly 100 MW‑class development built around 20 Siemens Gamesa wind turbines each with a nameplate capacity of 5.2 MW.

Acoustical Design Challenge for a Utility‑Scale Wind Energy Facility in Rural Alberta

The project is located in a rural sound environment where measured noise can vary widely due to wind‑driven vegetation, wildlife, weather, and intermittent local activity. In this setting, post‑construction verification requires more than simply collecting sound data—it demands a defensible methodology that separates wind turbine sound from changing background conditions and assesses compliance at nearby residences.

In Alberta, that compliance framework is defined by the Alberta Utilities Commission’s AUC Rule 012 – Noise Control (“Rule 012”), which sets the permissible sound level requirements and establishes how noise compliance is evaluated for AUC‑regulated facilities, including wind projects.

HGC’s Acoustical Assessment Approach (Rule 012 Compliance)

HGC Noise Vibration Acoustics was retained to complete a post‑construction comprehensive sound level survey at two designated receptor locations near the facility, as required by the applicable AUC decision. The monitoring and analysis approach was structured around Rule 012 expectations for representative conditions and defensible screening—recognizing that real‑world datasets often include precipitation, shifting wind direction, and unrelated noise events.

Practically, this meant designing the monitoring program to capture turbine operation under conditions that best represent turbine‑to‑receptor propagation, and applying disciplined data review so that the final dataset reflects appropriate meteorology and consistent facility operation.

Environmental Noise and Low‑Frequency Sound Considerations

Rural environments can contain meaningful low‑frequency energy from natural sources and wind effects, which can complicate interpretation of long‑duration unattended monitoring. Rule 012 provides a consistent framework for evaluating low‑frequency and tonal characteristics when warranted, helping ensure these topics are assessed in a transparent and repeatable manner rather than assumed.

Compliance Verification and Confidence for Community and Owner/Operator Stakeholders

The intent of the post‑construction work was to verify that the project’s operational sound performance aligns with Alberta’s regulatory expectations and the compliance requirements applied to wind facilities. By applying a Rule 012‑aligned monitoring, screening, and reporting approach, HGC supported a clear compliance narrative grounded in Alberta’s established noise control guidance.

Acoustical Services Provided by HGC Noise Vibration Acoustics

• Post‑construction comprehensive sound level survey

• Environmental noise monitoring and analysis

• Low‑frequency noise assessment considerations

• Instrumentation deployment and remote data validation

• Regulatory compliance evaluation and reporting aligned with AUC Rule 012 – Noise Control