• Specialty

  Noise / Vibration
  

• SECTOR

  Energy / Power
  

• TYPE

  Permitting / Compliance
  

• CLIENTELE

  Private Sector
  

• TIMESPAN

  2011

• LOCATION

  Winona County, MN

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.