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Township of Northville, MI
Wayne County
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Table of Contents
Table of Contents
All activities, equipment, roadways and material storage areas shall be treated, covered, muffled or otherwise controlled to ensure compliance with the following performance standards:
A. 
Operations will be conducted in a way to minimize negative impacts on adjacent areas.
B. 
Operations will be conducted in a way to minimize negative impact on groundwater, watercourses, water bodies and wetlands.
C. 
Operations will be conducted in a way to minimize dust and dirt.
D. 
Equipment used shall be constructed, maintained and operated in such a manner as to eliminate, insofar as is practicable, noises and vibrations which are injurious or substantially annoying to persons living in the vicinity.
All mining sites shall be fenced prior to the commencement of extractive operations and prior to the placement on the site of machinery or buildings. The fence shall completely surround the borders of the subject property; provided, however, for good cause shown in relation to the protection of public safety in view of the operations conducted, the Township Board may, in its discretion, modify the precise location of fencing. The minimum specifications for the fencing shall be as follows: A six foot high farm-type fence of nine-gauge top wire, twelve-gauge bottom wire, fourteen-gauge stays and intermediate wire and spacing of six inches vertically by 12 inches horizontally; all stays shall be of fourteen-gauge wire; and support posts shall be spaced on sixteen-foot centers or less.
The perimeter of any mining site shall be conspicuously and adequately posted with signs in accordance with the sign provisions of Chapter 170, Zoning, as amended, to indicate the danger of trespassing in the area. In no event shall such signs be more than 200 feet apart and the same shall be constructed of a weather-resistant rigid and sturdy material and shall be maintained and replaced as needed.
All active excavations and mining operations shall be visually screened from view from all adjacent public highways and residentially used parcels. Any of the following methods shall be used for such screening as determined by the Township Board, following recommendation of the Township Planning Commission:
A. 
Construction of a raised earth berm along the boundary lines of the premises where such lines abut a public highway, abut privately owned property which is improved and occupied for residential purposes and at such places as are necessary to screen processing equipment from the view of a person standing at ground level on any parcel of land improved and occupied for residential purposes located adjacent to or which fronts on any of the road forming the boundaries of the mining site. When constructed along public highways, the berm shall be of a sufficient height to screen processing equipment from the view of the general public using the highway as required by Chapter 170, Zoning. Where the berm is constructed adjacent to residential property or to screen nonadjacent residential property, it shall be sufficient in length and height to screen that portion of the property actually improved and occupied for residential purposes as required by Chapter 170, Zoning. All beams constructed adjacent to residential property shall be designed to prevent soil erosion, encroachment and excessive water runoff. During the next planting season following the placement of the berm and as often as may be necessary thereafter to ensure the existence of a vegetative ground cover, the licensee shall seed or plant the berm in a manner suitable for the area and for soil conditions so as to provide vegetation to check erosion and to provide a visible ground cover substantially similar to the vegetation cover previously on the property and/or adjacent property. Topsoil shall be spread as needed to sustain growth of vegetation. Where the topography of the area acts as a natural screen, the Township Board may waive the berm requirement. The berm shall have slopes not in excess of one foot vertical and three feet horizontal; or
B. 
Planting of coniferous trees along the boundaries of the property with sufficient rows and depth to permit effective screening as determined by the Township Board and following recommendation of the Planning Commission.
A. 
Excavation, washing and stockpiling of extracted material and all truck movements associated with the hauling of extracted materials shall be restricted to weekdays between the hours of 7:00 a.m. and 7:00 p.m. except in cases of a public emergency declared by the Township Board of Trustees and described in detail in the license.
B. 
The Board of Trustees, upon review and recommendation of the Planning Commission, may permit extended hours of operation as a separate special land use, in accordance with the standards and procedures described below:
(1) 
Operations, specified in writing as part of the permit and special land use request, may begin no earlier than 6:30 a.m. on weekdays, excluding holidays, provided operations that involve trucks over one ton entering or exiting the site will cease by 5:30 p.m. and other operations shall cease by 6:00 p.m., instead of 7:00 p.m. otherwise allowed.
(2) 
Operations, specified in writing as part of the permit and special land use request, may be conducted on Saturdays, excluding holidays, to begin no earlier than 6:30 a.m. and to cease by 2:30 p.m.
(3) 
Conditions and restrictions can be imposed on the extended hours of operations to ensure compliance with the standards of this section.
(4) 
All hours of operation shall be consistent with the License Ordinance and mining permit.
(5) 
The Planning Commission shall find all of the following:
(a) 
The extended hours will not negatively impact surrounding existing uses as described in § 170-19.5E(11)(a), (b) and (c) of Chapter 170, Zoning, to a significantly greater degree than the regular hours.
(b) 
The extended hours will not discourage development in the surrounding area in accordance with the Township Master Plan.
(c) 
Site improvements to mitigate negative impacts have been maintained, the applicant has demonstrated compliance with the Township's operating standards and a good faith effort to respond to reasonable concerns expressed by the public regarding the operation.
(6) 
The operator shall post on a sign in clear view at the entrance the approved hours of operations.
(7) 
The special land use shall require review and renewal on an annual basis in accordance with the following procedures:
(a) 
The operator shall notify the Township of the request to continue the extended hours of operation at least 30 days before the expiration date, the applicant shall provide a written summary of complaints regarding the extended hours of operation and the response to such complaints during the year.
(b) 
A notice of the request for special land use renewal shall be published in a newspaper of general circulation in the Township and sent to all owners of property within 300 feet of the site. The notice will indicate that a public hearing may be requested, but that no hearing will be held unless such a request is made.
(c) 
The Planning Commission shall conduct a public hearing, if requested, and review the impact of the extended hours of operation based on the standards in Subsection B(5) above. The Planning Commission shall either approve, approve with conditions or deny the extended hours of operation. Any approval shall again be valid for one year. The Planning Commission shall provide a report of its findings and decisions to the Board of Trustees during its annual review of the mining permit.
All parcels being mined under the provisions of this chapter shall have direct access to a paved thoroughfare, which roadway shall be improved to the specifications of the Wayne County Department of Public Services. In the event the operation of a mined area shall cause any mined material, overburden and/or similar materials to be deposited upon the public highway in the Township, it shall be the responsibility of the operator to remove such materials within 12 hours of receipt of notice from the Planning and Zoning Administrator or his/her designate. This requirement shall not waive any other higher or more restrictive requirements by any other governmental entity or agency.
All roads within the mineral mining site shall be maintained by the operator at all times in a dust controlled condition by the use of hard surface paving material or the application of other dust retardants. Moreover, the location and maintenance of roads shall be such as to avoid harm and/or impairment to any bodies of water as well as to surface and/or groundwater.
A. 
All equipment and facilities used in the production, processing or transportation of sand, gravel or stone shall be constructed, maintained and operated in such a manner as to eliminate, insofar as practical, sounds, vibrations or dust which interfere with the reasonable use and enjoyment of surrounding property. At a minimum, the operations shall conform to all performance standards set forth in Chapter 170, Zoning, as amended, or any successor zoning ordinance, and Chapter 117, Noise, of this Code, except as specifically modified herein. Where feasible, the processing plant and accessory equipment shall be situated below the average grade of the surrounding parcels so as to effectuate screening from sight, sound, dust and vibration.
B. 
The intensity level of sounds shall not exceed the following decibel levels, as measured from the nearest property line of the following types of adjacent uses, where applicable; 55 decibels from residentially used property; 62 decibels from commercially used property; and 70 decibels from industrially used property. Measurements shall be made under this section on an "A" weighting scale.
C. 
All machinery and other operations conducted on or at the mining site which cause vibration shall be conducted so as to prevent transmission of ground vibration. The ground vibration shall be measured from any lot line adjoining the site and the vibrations shall not exceed the vibration perception threshold of an individual standing on said lot line.
All lighting used to illuminate the property and operation and each and every portion thereof shall be directed away from surrounding property. Shielding shall be required where lighting would otherwise be directed toward a residential use and/or county road.
No aspect of the operation, including, without limitation, mining storage and/or transportation of minerals, shall result in a danger to the public health or safety, and/or impairment and/or pollution of the ground water, surface water and/or watershed and surface water shall at all times, be directed in such a manner so as not to interfere with the adjoining property owners; provided, however, that maintenance of the direction and volume of the natural flow of surface water shall not be deemed an interference. Proper drainage shall be provided at all times to prevent the collection and stagnation of water, except in conformance with the reclamation plan as approved as part of the licensure permit.
Minimum setbacks for future excavation and operations areas, excavation-and-operations-in-progress areas, interim restoration-in-progress areas and interim restored areas:
A. 
Future excavation and operations areas, excavation-and-operations-in-progress areas, interim restoration-in-progress areas and interim restored areas shall be set back from the outer boundary of the subject property a minimum of 50 feet, except that a larger setback may be required by the Township Board of Trustees in circumstances where a greater setback is deemed necessary to adequately protect adjacent land areas. Grading and excavation activities may take place up to the property line beginning six months before the completion of excavation in an area when necessary to implement an approved restoration plan.
B. 
Excavation, washing and stockpiling of extracted material shall not be conducted closer than 300 feet to the margin of any stream or waterway without written permission from the Michigan Water Resources Commission.
Machinery, equipment and methods of operation on the mining site shall be limited to those specified in the permit application, unless approval for same is subsequently granted by the Township Board, in which case such approval shall be made part of the permit. In no event shall the activity of gravel crushing or concrete crushing be permitted unless specifically authorized by the license after a finding that such activity will not be a detriment to the health, safety and welfare of the surrounding properties.
Any and all activities of the mining operation, where applicable, shall be subject to all of the standards required in any other applicable law, ordinance or regulation for wetlands and watercourse protection, including this chapter.