Tech Environmental: Focused Knowledge. Real Solutions.

  • Specialty:

    Noise / Vibration

  • Location:

    Energy / Power

  • Type:

    Permitting / Compliance

  • Timespan:

    2011

  • Location:

    Winona County, MN

Project Number:

3490

Juhl Wind: Gunderson Lutheran Wind Farm

SERVICE:

Noise and Shadow Flicker Study

DESCRIPTION:

Juhl Wind, Inc. has developed the 5-MW Gunderson Lutheran Wind Project in Winona County, Minnesota consisting of two Clipper C96 – 2.5 MW turbines.

Tech Environmental, Inc. (Tech) was retained by Juhl Wind to conduct a sound study and a shadow flicker analysis on the proposed Gunderson Lutheran Wind Project. Tech conducted acoustic modeling with Cadna-A that confirmed that the sound generated by the wind turbines complies with the nighttime Minnesota noise standards and does not produce a pure tone. Finally, Tech’s investigation found that the shadow flicker effect from the turbines is less than the industry standard of 30 hours per year.

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Key Points
  • Juhl Wind Inc. needed to know whether the proposed wind farm would comply with Minnesota Noise Standards, as well as industry standards for shadow flicker.
  • Tech conducted a thorough sound study and a shadow flicker analysis which demonstrated that the proposed wind farm complies with Minnesota Noise Standards as well as industry shadow flicker standards.