6.8. SR 05-15-2000 - Laserfiche WebLink

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Biological Survey - A review of the DNR Minnesota Biological Survey did not indicate any Natural Communities or Rare Species on the subject property. Archaeological or Historic Resources - When the city did the EAW for the Tyler Street Extension, the State Historic Preservation Office (SHPO) indicated that they believe there is a good probability that unreported archaeological properties may be present within the urban service area associated with this road corridor, especially on sites that have not been previously disturbed. The site involved in this request is within the area of concern and has not been previously disturbed. Staff contacted SHPO regarding the need for conducting an archaeological survey on this site. SHPO is not recommending a survey. Farmland - No prime farmland, farmland of statewide significance, or farmland of local importance has been identified on the site in question. Wetlands - The US Fish and Wildlife "Wetland Inventory Map" indicates that a wetland exists on this site. The wetland has been identified on the attached plans. The proposed excavation does not infringe on this wetland and the plans include adequate erosion control to protect it. If additional erosion control is needed, staff will have the authority to require it. Power Line Easement - The plan as submitted shows mining activities encroaching into the easement for a main electrical transmission line. The Mineral Excavation Ordinance requires a five feet setback from such an easement. However, the city has made exceptions to this in the past with restrictions as set by the owner of the power line. This particular power line is owned by the City of Hutchinson. Staff recommends that the petitioner acquire permission in writing from the Hutchinson Utilities. The attached plans reflect Hutchinson's requirements. Setbacks -The minimum setback from a mining operation and adjacent properties is 50 feet. The attached plans reflect this minimum setback, which staff believes to be adequate in this particular situation. Haul Route - It has been indicated to staff that the material excavated will be used as general fill for projects adjacent to the excavation site. Staff is recommending that Tyler Street not be used as the haul route from this mine, but that the petitioner is allowed to cross Tyler Street, if need be, to gain access to the projects where the material will be used. Staff further recommends that on-road trucks be required to cross Tyler Street once curb for that road has been installed. Lastly, due to safety concerns regarding gravel trucks crossing a collector street at an uncontrolled location, staff recommends that hauling material from the site cease altogether, once Tyler Street is operational and open to the public, unless an alternative haul route is approved by the City Engineer. Slopes - Slopes during operations, other than the working face, shall be no steeper than 1 foot horizontal to 1 foot vertical, except that adjacent to roadways, other rights-of-way, and water bodies slopes shall be a maximum of 4 feet horizontal to 1 foot vertical. Slopes steeper than 1½ feet horizontal to 1 foot vertical and other areas that pose a danger to the public shall be controlled by a four foot tall fence.