Agenda - Parks and Recreation Commission - 09/14/2006

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_M'.________.~___'__M_..__'__.___'_'_'_ ._.._____..___._M______.____.__ .__ ._. _M~________.___.__._~____._.___, _. ___...___.____~_________~____.__._..___.__..._____..__.________._ trail system, south of TH 10. E. Existing ROW Information The topographic and property line information, used as a background for the trail layout drawings, was acquired from the City of Anoka and the City of Ramsey. The information within the City of Ramsey appears to be much more accurate than the City of Anoka inform'ation; however it is more than adequate for the purposes of this project. Existing right of way information was taken from half section drawings produced by the Anoka County surveyor's office. F. Flood Elevations 100 year flood elevation information was taken from Flood Insurance Rate Maps that are produced by the U.S. Department of Housing and Urban Development. G. Historical! Cultural Background Information At this time, it is unknown if there are any known or suspected archaeological properties in the area that will be affected by this project. The State Historical Preservation Office should be consulted for further information. H. Natural Resources Impacts This proie~t will include some clearing and grubbing, which will have a minimal affect on items such as native plant communities, and the existing trees. Construction of the trail through the Kings Island area may have a small impact on the existing wetlands, particularly for the crossing of the oxbow to connect with the Mississippi River Community Park. Wetland mitigation will be required for any wetland impacts associated With this project. Planners and designers will need to work with regulating agencies, such as the Corps of Engineers, Minnesota Department of Natural Resources and local watershed districts to ensure proper permits. IV. TYPICAL SECTION DISCUSSION The Minnesota Department of Transportation Bikeways Manual indicates that a trail pavement width of 10 feet is satisfactory for 2000 or less, pedestrians / bicycles on a summer day. In areas where there are restrictive conditions, the path may be narrowed to 8. feet. These MnDOT standards have been used as guidelines in the development of ,this study. For the purposes of this study, it has been assumed that a 8 to 10 foot, off the street path is preferred wherever possible and a signed on-street path is adequate where existing conditions restrict it from being off street. In order to provide enough room to construct a 10 foot path, a temporary easement of 10 feet will typically be needed adjacent to the path. If a temporary Page 4 22