Agenda - Public Works Committee - 08/15/2011

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Municode Page 2 of 5 h. A rehabilitation or restoration plan providing for the orderly and continuing rehabilitation of all excavated land. Such plan shall illustrate, using appropriate photographs, maps, and surveys drawn to a scale of one inch equals 100 feet and with a two -foot contour interval satisfactory to the engineer, the following: 1. The final or planned contours of the land when the mineral removal operations are completed. 2. Those areas of the work site that will be used for storage of top soil and overburden. 3. The elevation and location of all water bodies. i. Location of any and all existing wells and the size and depth thereof located on the work site. j. Location and description of any proposed dewatering operations. k. An analysis of the earth material to be used in the filling, which analysis shall include the following: 1. pH content. 2. Organic material content. 3. Determination of the presence or lack of hazardous substances as defined by the Minnesota Pollution Control Agency. I. The analysis as required herein shall be certified by a qualified testing laboratory. m. Any other information requested by the city staff, planning commission or council. (e) Performance standards. (1) General provisions. a. Weeds and other unsightly or noxious vegetation shall be cut or trimmed as may be necessary to preserve a reasonably neat appearance of the work site and to minimize seeding on adjacent property. b: All equipment used for grading mining or filling operations shall be maintained and operated in such a manner as to minimize, as far is practicable, noises, dust and vibrations adversely affecting surrounding properties. In addition, all machinery shall be kept in good repair and painted regularly. Abandoned machinery and rubbish shall be removed from the work site regularly. c. All hauling operations shall be completed so as to minimize noise, safety and dust concerns to adjacent residential properties. d. All grading, mining and filling work sites shall be properly safeguarded to prevent the general public from depositing garbage or other refuse in the work site. e. All structures that are not being used shall be removed from the work site. f. Existing tree and ground cover shall be preserved to the extent feasible, maintained and supplemented by selective cutting, transplanting and replanting of trees, shrubs and other ground cover along all setback areas. (2) Water resources. a. The grading, mining or filling operation shall be conducted in such a manner as to minimize interference with the surface water drainage outside of the boundaries of the operation. b. Excavation occurring below groundwater elevation may require an analysis performed by a hydrologist or other qualified professional. Such analysis shall address whether the proposed excavation shall have a significant impact on the adjacent groundwater quantity and quality. In general, excavations less than 15 acres shall be exempt from this requirement unless there is evidence of clay lenses or perched water table adjacent to the excavation, in which case some analysis may be required. (3) Safety fencing. Safety fencing may be required around all or portions of the grading, mining or filling operation at the discretion of the council. Fencing may be ordered by the council or city engineer any time the permit is in force and shall be installed within 24 hours' written notice. (4) Access roads. a. The location of the intersection of mining, grading or filling access roads with any public roads shall be selected such that traffic on the access roads will have sufficient distance of public roads in view so that any turns onto the public road can be completed with a margin of safety as determined by the city engineer. b. All access roads from grading, mining or filling operations to public highways, roads or streets shall be maintained in order to minimize dust considerations. (5) Fill materials. An analysis of all fill materials must be provided to and approved by the city engineer prior to commencing any filling activities. No filling materials shall be permitted which in the opinion of the city engineer would be undevelopable or create substandard soils. (6) Screening barrier. To minimize problems of dust and noise and to shield operations from public view, a screening barrier may be required between the work site and adjacent properties. A screening barrier may also be required between the work site and any public roads located within 500 feet of any grading, mining or filling operations. The screening barrier shall be planted with a species of fast growing trees, and where practical, stockpiles of overburden materials shall be used to screen the operation work site. (7) Slopes. The maximum permitted slope for any grading, mining or filling operation other than the working face shall be sloped on all sides at a maximum ratio of two feet horizontal to one foot vertical, unless a steeper slope shall be approved by the engineer. In no case shall the slope of the working face of the operation be left unattended with a slope greater than two feet horizontal to one foot vertical. Where excavations are adjacent to a public roadway or other right -of -way, the excavation shall have a maximum four to one slope. Slopes adjacent to or contiguous to bodies of water shall be sloped at a maximum of five to one. (8) Setback. Grading, mining or filling operation shall not be conducted closer than 30 feet to the right -of -way line of any existing or platted street, road or highway, except that excavating may be conducted within such limits in order to reduce or raise the elevation thereof in conformity to the existing or platted street, road or highway. (9) Security agreement. Prior to commencing any grading, mining or filling operations, a performance bond, cash escrow or irrevocable letter of credit, in such form and amounts as the city may require, shall be deposited with the city. The amount of http:// library. municode .com /print.aspx ?clientID= 14286 &HTMRequest = http %3a %2f /o2flibrary.municode.c... 8/11 /2011