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July 8, 1977 Page 3 start on the east side, proceed to the northeast and southwest corners and be completed on the northwest quadrant. A diagram of the proposed sequence is attached. It is anticipated that this may vary somewhat to meet conditions encountered, but the basic concept of east first-west second would prevail. 6. The concrete and other debris will be buried in a non-building area of the greenway. RESTORATION AND EROSION CONTROL 1. It is proposed that as the excavation proceeds, that the site would be restored in areas of approximately five acres. This would be done by seeding wi th a mi xture of grasses that meets the Mi nnesota Hi ghway Department specificaitons. We have been advised that this system has proved effective on other sites. The minimal amounts of clay and topsoil on the site would be utilized in finish grading. Other top dressing would be delivered and spread on the site. 2. The existing bank on the west boundary has stabilized and is not eroding at this time. It will not be cut so erosion is not anticipated. The slope presently supports a growth of wild grasses, weeds, shrubs, and cottonwood trees. There is a substantial tree growth at the southeast corner of the water reservoir property. It is proposed that the present growth will be supplemented with hardier tree stock and with grasses which will tend to choke the weeds. No filling on the site is anticipated. 3. The excavation of the gravel will tend to reduce any erosion problems ~'/hich may occur. Except for very small areas, almost all the surface", water on the site will flow to the new and existing ponds in the center of the site. The ponds have the potential to trap all except the heavipst rainfall. They meet with the approval of the Watershed Board. They re- quested a temporary dam between the ponds to control Silting which will be provided. They also suggested an area of cattails and similar marsh growth to dispose of the nutrients. FUTURE DEVELOPMENT The purpose of the Special Use application is two fold: 1. To extract the granular fill which is a valuable resource and in short supply. 2. To prepare the site for a housing development. It is anticipated that a submittal for a Planned Unit Development will be proposed by late 1977 or early 1978. It is proposed that the gravel extraction would commence this summer and continue until weather closes the operation. To reduce the density of truck hauling and to allow the greatest flexibility to the excavating contractors, it is proposed that the permit be issued for a period of five years and the start of restoration begin in eighteen months as previously indicated. It is proposed that the east half of the site will be prepared first with the expectation that the housing development will start in this area and work