1. Requirements for Building-Mounted Wind Energy Systems (BWES)
a. Building-Mounted Wind Energy Systems (BWES) Building Permit Application Requirements
i. A BWES shall be a Special Use in all residential zoning districts.
ii. A BWES shall be allowed as a Permitted Use in any non-residential zoning district, provided that all building permit requirements and general regulations are met including the Building Code, Zoning Ordinance and the requirements referenced herein.
iii. On a property that is used for residential purposes, BWES shall be only Vertical Axis Wind Turbines (VAWT), and Horizontal Axis Wind Turbines (HAWT) shall be prohibited.
Building-Mounted Wind Energy Systems (BWES)
i. Name, address and phone number of Owner and Applicant.
ii. Project summary including the manufacturer information and number of proposed turbines.
iii. Photos of the proposed location of BWES.
iv. A front elevation depiction of the building showing location and proposed height of the top of the turbine from the top of the building.
i. Manufacturer's engineering specifications of the turbine, nameplate wattage capacity, dimensions of the turbine unit, mounting mechanisms, expected load and expected sound level production that must fit within the Sound Level standards below.
ii. All BWES facilities shall be designed to withstand a minimum wind velocity of one hundred (100) miles per hour, with an impact pressure of forty (40) pounds per square foot.
iii. Each BWES shall conform to applicable industry standards, including those of the American National Standards Institute (ANSI). Applicants shall submit certificates of design compliance that equipment manufacturers have obtained from one of the following: Underwriters Laboratories (UL), National Renewable Energy Laboratories (NREL), Det Norske Veritas (DNV), Germanischer Lloyd Wind Energie (GL), or an equivalent third party.
i. BWES facilities shall be equipped with automatic and manual braking systems.
ii. The Owner shall be required to immediately cease operations as reasonably requested by the Village of Deerfield.
Proof of homeowner or business liability insurance, as appropriate.
Approval letter from the local electric utility company, if the system is to be tied to the energy grid.
b. Additional Standards for Building-Mounted Wind Energy Systems (BWES)
i. BWES facilities must be installed according to manufacturer specifications.
ii. BWES devices may be structurally attached either on the roof or on the side of a building, in accordance with the Village of Deerfield's Building Code.
iii. Electrical connections must be made by a licensed electrician.
iv. The blade tip, at its lowest point, shall have ground clearance of not less than fifteen (15) feet.
v. No support structure tower used for a BWES shall be either a lattice tower or supported by guy wires.
BWES facilities shall be allowed at the height of fifteen (15) feet above the highest point of the building structure, but in no case shall exceed forty-five (45) feet above the ground in a residentially zoned district.
i. The average sound level from a BWES shall not exceed fifty (50) dB(A) at any point within neighboring, residentially zoned or used property. For neighboring industrial properties the sound level limit is sixty-five (65) dB(A) and for other neighboring non-residential properties, the sound level limit is sixty (60) dB(A) at any time of the day.
ii. No BWES shall operate with an average sound level more than 5 dB(A) above the non-operational ambient level, as measured within any neighboring residentially zoned or used property.
iii. If more than one (1) WES is located on a property, the average sound level shall be cumulative, and the total sound from all WES on the property shall not exceed the allowable decibel level.
iv. To limit the level of low-frequency sound, the average C-weighted sound level during BWES operation shall not exceed the A-weighted ambient sound level by more than twenty (20) dB.
v. Sound level meters used for sound measurement must be a Type 2 or better grade per ANSI S1.4 and must have an integrating feature that meets ANSI S1.43. Procedures must meet the applicable portions of ANSI S12.9. Measurements must be made when ground level winds do not exceed 5 miles per hour.
vi. The Village of Deerfield may require, at the Owner's expense, field tests or sound propagation modeling, conducted by or supervised by an acoustics specialist certified by the Institute of Noise Control Engineering as may be necessary, to determine whether a violation of said sound regulations is occurring or has occurred. The Owner shall be required to promptly remedy any such violations or discontinue operation.
i. The BWES shall be sited such that shadow flicker will not fall on any window of an existing residential dwelling of an abutting nonparticipating property for more than one hour a day.
ii. The Applicant may commit to a schedule for turning BWES turbines off during periods when shadow flicker would affect any nonparticipating residential dwelling.
iii. Subsequently constructed or modified residences shall not compromise the existing approval and operation of the BWES, as a legal non-conforming use, subject to the applicable regulations.
i. The diameter of the BWES shall not exceed twenty (20) percent of the width of the building's front elevation, for residential buildings and non-residential buildings abutting residentially used properties.
ii. The diameter of the BWES shall not exceed fifty (50) percent of the width of the building's front elevation for a non-residential building, not abutting residentially used properties.
BWES facilities shall be finished in a neutral color, as approved by the Village of Deerfield zoning code administrator. The finish shall be flat or matte, so as to reduce incidence of sun glint. The required coloration and finish shall be maintained throughout the life of the system.
(7) Electronic Interference
BWES facilities shall not operate so as to cause electromagnetic degradation in performance of microwave, television, radio, internet or other wireless transmissions, including public emergency communications systems, contrary to Federal Communication Commission (FCC) or other state or local laws.
No BWES shall have any advertising material, writing, picture, or signage, other than warning information or manufacturer identification.
i. The primary purpose of the BWES shall be the production of energy for consumption on the same property.
ii. It is permissible to sell excess energy that is produced by a BWES to the local electric utility company.
c. Maintenance, Complaints, and Decommissioning
(1) Maintenance and Complaints
i. BWES facilities shall be maintained in Operational Condition at all times, except for reasonable maintenance and repair outages.
ii. Should a BWES become inoperable, or should any part of the BWES become damaged, or should a BWES violate a permit condition, the Owner shall cease operations immediately and remedy the condition promptly.
i. For any BWES that has not been in Operable Condition within the above timeframe, the Village of Deerfield zoning compliance officer shall notify the Owner of the finding of Abandonment. The Owner shall remove all BWES structures within ninety (90) days of receipt of the finding of Abandonment.
ii. If such abandoned facility is not removed within ninety (90) days, the Village of Deerfield may remove all structures at the Owner's expense. In the case of such removal the Village of Deerfield has the right to file a lien for reimbursement, or any and all expenses incurred the Village of Deerfield without limitation, including attorney fees and accrued interest.
iii. Upon removal, the site shall be restored to its original pre-construction condition. See photos presented with Project Proposal.
2. Requirements for Small Wind Energy Systems (SWES)
a. Small Wind Energy Systems (SWES) Building Permit Application Requirements
i. An SWES shall be a Special Use in all zoning districts.
ii. In residential zoning districts, there shall be limit of one (1) SWES.
iii. On a property that is used for residential purposes, SWES shall be only Vertical Axis Wind Turbines (VAWT), and Horizontal Axis Wind Turbines (HAWT) shall be prohibited.
i. Name, address and phone number of Owner and Applicant.
ii. Photos of existing conditions for proposed SWES tower.
iii. Project summary including the manufacturer information, number of proposed turbines, and proposed height to the top of the turbine.
i. Manufacturer's engineering specifications of the tower, turbine and foundation, detailed drawing of electrical components and installation details, and expected sound level production are required (see Sound Level standards below).
ii. For turbines greater than twenty (20 kW) kilowatts of nameplate capacity, an Illinois licensed structural engineer's seal shall be required.
iii. All SWES facilities shall be designed to withstand a minimum wind velocity of one hundred (100) miles per hour, with an impact pressure of forty (40) pounds per square foot.
iv. Each SWES shall conform to applicable industry standards, including those of the American National Standards Institute (ANSI). Applicants shall submit certificates of design compliance that equipment manufacturers have obtained from one of the following: Underwriters Laboratories (UL), National Renewable Energy Laboratories (NREL), Det Norske Veritas (DNV), Germanischer Lloyd Wind Energie (GL), or an equivalent third party.
i. SWES facilities shall be equipped with automatic and manual braking systems.
ii. The Owner shall be required to immediately cease operations as reasonably requested by the Village of Deerfield.
Proof of homeowner or business insurance, as appropriate.
Approval letter from the local electric utility company, if the system is to be tied to the energy grid.
b. Site Planning and Site Capacity (SWES)
(1) Site plan, drawn to scale, including:
i. Existing and proposed contours, at a minimum of two foot intervals.
ii. Location, setbacks, exterior dimensions and square footage of all structures on the owner's property and abutting properties within one hundred (100) ft.
iii. Location and size of existing waterways, wetlands, one hundred-year floodplains, sanitary sewers, storm sewer systems, and water distribution systems.
iv. Location of any overhead or underground power lines and utility easements.
v. The locations and the expected duration of shadow flicker caused by the SWES facility.
i. Setbacks shall be measured from the base of the SWES tower.
ii. SWES facilities may not be constructed within or over (including the blades) any utility, water, sewer, or other type of recorded easement.
iii. SWES facilities may not be constructed within 50 ft. of all water bodies and wetlands and 100 ft. of High Quality Aquatic Resources.
iv. In residential zoning districts, SWES shall not be located in any front yard or corner side yard.
v. SWES facilities shall be set back a distance equal to one hundred ten percent, or 1.1 times the system height, from the base of the tower to all property lines, third party transmission lines, and communication towers.
vi. SWES located on a non-residential property abutting a property used for residential purposes shall be set back a distance equal to one hundred fifty percent, or 1.5 times the system height, and in no case may be less than 100 feet from the base of the tower to all property lines, third party transmission lines, and communication towers.
vii. The blade tip, at its lowest point, shall have ground clearance of not less than fifteen (15) feet.
viii. No tower used for a SWES shall be either a lattice tower or supported by guy wires.
i. In residentially zoned districts the system height for SWES shall be limited to a maximum of forty-five (45) feet.
ii. In non-residentially zoned districts the system height for SWES shall be limited to a maximum of seventy-five (75) feet.
i. The primary purpose of the SWES shall be the production of energy for consumption on the same property.
ii. It is permissible to sell excess energy that is produced by a SWES to the local electric utility company.
c. Additional Standards for Small Wind Energy Systems (SWES)
i. SWES facilities must be installed according to manufacturer specifications.
ii. Electrical connections must be made by a licensed electrician.
i. The average sound level from a BWES shall not exceed fifty (50) dB(A) at any point within neighboring, residentially zoned or used property. For neighboring industrial properties the sound level limit is sixty-five (65) dB(A) and for other neighboring non-residential properties, the sound level limit is sixty (60) dB(A) at any time of the day.
ii. No SWES shall operate with an average sound level more than 5 dB(A) above the non-operational ambient level, as measured within any neighboring residentially zoned or used property.
iii. If more than one (1) WES is located on a property, the average sound level shall be cumulative, and the total sound from all WES on the property shall not exceed the allowable decibel level.
iv. To limit the level of low-frequency sound, the average C-weighted sound level during SWES operation shall not exceed the A-weighted ambient sound level by more than twenty (20) dB.
v. Sound level meters used for sound measurement must be a Type 2 or better grade per ANSI S1.4 and must have an integrating feature that meets ANSI S1.43. Procedures must meet the applicable portions of ANSI S12.9. Measurements must be made when ground level winds do not exceed 5 miles per hour.
vi. The Village of Deerfield may require, at the Owner's expense, field tests or sound propagation modeling, conducted or supervised by an acoustics specialist certified by the Institute of Noise Control Engineering as may be necessary, to determine whether a violation of said sound regulations is occurring or has occurred. The Owner shall be promptly remedy any such violations or discontinue operation.
i. The SWES facility shall be sited such that shadow flicker will not fall on any existing residential building of a nonparticipating property within five hundred (500) feet of the SWES property for more than one hour a day.
ii. The Applicant may commit to a schedule for turning SWES turbines off during periods when shadow flicker would affect any nonparticipating residential dwelling.
iii. Subsequently constructed or modified residences shall not compromise the existing approval and operation of the SWES, as a legal non-conforming use, subject to the applicable regulations.
i. SWES facilities shall be finished in either off white, light gray, other neutral color, or a color as approved by the Village of Deerfield zoning compliance officer.
ii. The finish shall be flat or matte, so as to reduce incidence of sun glint.
iii. The required coloration and finish shall be maintained throughout the life of the system.
(5) Electronic Interference
SWES facilities shall not operate so as to cause electromagnetic degradation in performance of microwave, television, radio, internet or other wireless transmissions, including public emergency communications systems, contrary to Federal Communication Commission (FCC) or other state or local laws.
i. No SWES shall have any advertising material, writing, picture, or signage other than warning, turbine tower identification, or manufacturer or ownership information.
ii. This prohibition shall include the attachment of any flag, decorative sign, streamers, pennants, ribbons, spinners or waiving, fluttering or revolving devices, but not including meteorological/weather devices.
iii. One (1) warning sign, no less than eighteen (18) square inches and no greater than two (2) square feet in area, shall be posted at the base of the tower. The sign shall include a notice of no trespassing, a warning of high voltage, and 911 and the phone number of the Owner to call in case of emergency.
iv. Manufacturer's identification or ownership information signs shall be no larger than one (1) square foot.
The base of the tower shall not be climbable for a vertical distance of fifteen (15) feet from the base, unless enclosed with a seven (7) foot tall locked fence.
i. SWES facilities shall comply with all applicable Federal Aviation Administration (FAA) and any other Federal, State or local requirements.
ii. SWES facilities shall not be artificially lighted unless required by the FAA or appropriate authority.
iii. Any required lighting shall be shielded so that no glare extends substantially beyond the boundaries of the facility.
d. Maintenance, Complaints and Decommissioning (SWES)
(1) Maintenance and Complaints
i. SWES facilities shall be maintained in Operational Condition at all times, except for reasonable maintenance and repair outages.
ii. Should a SWES become inoperable, or should any part of the SWES become damaged, or should a SWES violate a permit condition, the Owner shall cease operations immediately and remedy the condition promptly.
i. For any SWES that has not been in Operable Condition within the above timeframe, a Deerfield zoning compliance officer shall notify the Owner of the finding of Abandonment. The Owner shall remove all SWES structures within ninety (90) days of receipt of notice.
ii. If such abandoned facility is not removed within ninety (90) days, the Village of Deerfield may remove all structures at the Owner's expense. In the case of such removal the Village of Deerfield has the right to file a lien for reimbursement, for any and all expenses incurred by the Village of Deerfield without limitation, including attorney fees and accrued interest.
iii. Upon removal, the site shall be restored to its original pre-construction condition. See photos presented with Project Proposal.
The Owner of the BWES or SWES project shall defend, indemnify and hold harmless the Village of Deerfield and its officials from and against any and all claims, demands, losses, suits, causes of action, damages, injuries, costs, expenses and liabilities whatsoever including attorney's fees arising out of the acts or omissions of the Owner concerning the operation of the WES project without limitation, whether said liability is premised on contract or on tort.